Relevant bibliographies by topics / Dye-sensitized Solar Cells (DSSCs)

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Academic literature on the topic 'Dye-sensitized Solar Cells (DSSCs)'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 September 2023

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Journal articles on the topic "Dye-sensitized Solar Cells (DSSCs)"

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Jang, Yu Jeong, Suresh Thogiti, Kang-yong Lee, and Jae Hong Kim. "Long-Term Stable Solid-State Dye-Sensitized Solar Cells Assembled with Solid-State Polymerized Hole-Transporting Material." Crystals 9, no. 9 (August 30, 2019): 452. http://dx.doi.org/10.3390/cryst9090452.

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The long-term stability of liquid-state dye-sensitized solar cells (liquid-DSSCs) is a primary problem for the upscaling and commercialization of this technology. The solid-state dye-sensitized solar cell (ss-DSSC) has been instigated to overcome the liquid-DSSC’s inherent production and instability issues and advancement has been made to achieve low-cost high-power conversion efficiency. The photovoltaic performance of ruthenium-based complex Z907 dye was studied in ss-DSSCs using a solid-state polymerized conductive polymer as hole-transporting material (HTM). We investigated the long-term stability of both liquid and solid-state DSSCs and the findings revealed an improved photovoltaic performance and long-term stability of ss-DSSC. This mainly depends on the transport phenomena of the HTM throughout the interface. The present results show a pavement for manufacturing highly stable and inexpensive ss-DSSC and the practical use is promising.
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Thomas, Ankit Stephen. "High-Efficiency Dye-Sensitized Solar Cells: A Comprehensive Review." Computational And Experimental Research In Materials And Renewable Energy 5, no. 1 (May 31, 2022): 1. http://dx.doi.org/10.19184/cerimre.v5i1.31475.

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Keeping in mind our community's dependency on non-renewable sources of energy, it is a gravitating issue that seeks our attention and requires us to switch to renewable sources of energy at the earliest. A Dye-Sensitized Solar Cell (DSSC) is a third-generation photovoltaic technology that has immense capability to become highly commercial in a few years. Along the same lines, it is necessary to highlight that current DSSCs have shallow lifetime values, stability and performance. The efficiency of current DSSCs and the need to tackle their choice of materials and long-term stability is a concern. Some of the highest recorded efficiency values are around 12%, and this calls for severe replacement of conventional DSSC materials, modifications in the device structure and molecules, and improvement in testing and scaling-up measures. This review article underlines an introduction to DSSCs, working principle, components, high-efficiency DSSCs, strategies to improve device performance, DSSCs research in India, the advantages and disadvantages of the device, and recent research on fruit and flower-based DSSCs. Keywords: Dye-Sensitized Solar Cells, Solar Cell Materials, Third Generation Photovoltaics, High-Efficiency Dye-Sensitized Solar Cells, Solar Cells.
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M.Z., Najihah, and Winie Tan. "Dye extracted from Costus woodsonii leave as a natural sensitizer for dye-sensitized solar cell." Science Letters 15, no. 1 (January 3, 2021): 58. http://dx.doi.org/10.24191/sl.v15i1.11794.

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Current work employs dye extracted from leaves of Costus woodsonii as a new sensitizer for dye-sensitized solar cells (DSSCs). The leave was extracted in three different solvents namely ethanol, methanol, and acetone. Extraction of leaves was carried out by the freezing method. DSSCs with the configuration of TiO2/dye/electrolyte/Pt were assembled. The dyes in DSSCs were Costus woodsonii leaves extracted in methanol, ethanol, and acetone. DSSC with methanol extract of leaves has an efficiency of 0.23 % and short-circuit current density (Jsc) of 0.63 mA cm-2. DSSC sensitized with ethanol extract of leaves has an efficiency of 0.37 % and Jsc of 0.85 mA cm-2. DSSC sensitized with acetone extract of leaves shows the highest efficiency of 0.48 % and Jsc of 1.35 mA cm-2. The performance of the DSSCs in this work is compared with other natural dye-based DSSCs. The efficiency obtained in this work is better or at par with the works reported by other researchers. Keywords: Natural dye; Costus woodsonii; Leave; Dye-sensitized solar cells
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Lee, Kyoung-Jun, Jeong-Hoon Kim, Ho-Sung Kim, Dongsul Shin, Dong-Wook Yoo, and Hee-Je Kim. "A Study on a Solar Simulator for Dye Sensitized Solar Cells." International Journal of Photoenergy 2012 (2012): 1–11. http://dx.doi.org/10.1155/2012/834347.

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Dye-sensitized solar cells (DSSC) are emerging low-cost, simple alternatives to conventional solar cells. While there has been considerable study on improving the efficiency of DSSCs, there has not been sufficient research on a photovoltaic power conditioning system adaptable to DSSCs or on a solar simulator for DSSCs. When DSSCs are commercialized in the near future, the DSSC modules must be connected to an adaptable power conditioning system in order to manage the energy produced and provide a suitable interface to the load. In the process of developing a power conditioning system, a solar simulator with the characteristics of DSSCs is essential to show the performance of the maximum power point tracking. In this paper, a virtual DSSC is designed and simulated in PSIM. Irradiation factors, temperature and shadow effects are considered in dynamic link library block in PSIM which is linked to the external C routine. A 100 W converter is built to show the performance of a DSSC as the solar simulator controlled by a digital signal processor.
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Karki, Indra B., Jeevan J. Nakarmi, Pradeep K. Mandal, and Suman Chatterjee. "Dye-sensitized solar cells sensitized with natural dye extracted from Indian Jamun." BIBECHANA 11 (May 8, 2014): 34–39. http://dx.doi.org/10.3126/bibechana.v11i0.10377.

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Dye sensitized solar cell (DSSC) is a device which absorbs light from the sun with a layer of dye molecules and directly converts into electric energy. DSSCs based on ZnO have drawn attention worldwide due to their low cost and easy preparation techniques compared to conventional silicon based photovoltaic devices. Silicon based solar cells were the most popular before the emerging of dye-sensitized solar cells. These silicon based solar cells devices have dominated photovoltaic industry until now. The objectives of this study is to make DSSC using ZnO on ITO coated glass substrate as anode and characterize the DSSC properties such as conversion efficiency, short current density, open circuit voltage, and fill factor. ZnO thin films have been prepared on Indium tin oxide (ITO) glass substrate. These films were used to construct ITO/ZnO/Natural Dye/C/ITO, DSSCs with natural anthocyanin sensitizer extracted from wild Jamun fruits. The cells show open circuit voltage (Voc) of 0.58V, short-circuit current (I sc) of 1.66 mA and 0.58 fill factor (FF) with an conversion efficiency (η) of 1.23%. DOI: http://dx.doi.org/10.3126/bibechana.v11i0.10377 BIBECHANA 11(1) (2014) 34-39
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Chen, Mengdan. "Development of dye sensitized solar cells." E3S Web of Conferences 261 (2021): 01046. http://dx.doi.org/10.1051/e3sconf/202126101046.

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With the development of society, the demand for energy is increasing significantly, and the environmental problems are becoming more and more serious. Therefore, it is urgent to find efficient and clean new energy. Among the many new energy sources, solar energy has been favoured most for its universality, harmlessness and low cost. In 1991, the photoelectric conversion efficiency of dye-sensitized solar cells (DSSCs) has been greatly improved, which has attracted the attention. In recent 30 years, the researches on DSSCs have been increasing and expanding. Dye sensitizer is the most important component of DSSC, and also a key issue of researchers. This paper aims to summarize the types, structures and development trends of dye sensitizers, and provide inspiration for us to design and evaluate new dye sensitizers.
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Kohn, Sophia, Daria Wehlage, Irén Juhász Junger, and Andrea Ehrmann. "Electrospinning a Dye-Sensitized Solar Cell." Catalysts 9, no. 12 (November 21, 2019): 975. http://dx.doi.org/10.3390/catal9120975.

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Dye-sensitized solar cells (DSSCs) offer new possibilities to harvest solar energy by using non-toxic inexpensive materials. Since they can generally be produced on flexible substrates, several research groups investigated possibilities to integrate DSSCs in textile fabrics, either by coating full fabrics with the DSSC layer structure or by producing fiber-shaped DSSCs which were afterwards integrated into a textile fabric. Here we show a new approach, electrospinning all solid layers of the DSSC. We report on electrospinning the counter electrode with a graphite catalyst followed by a thin nonconductive barrier layer and preparing the front electrode by electrospinning semiconducting TiO2 from a polymer solution dyed with natural dyes. Both electrodes were coated with a conductive polymer before the system was finally filled with a fluid electrolyte. While the efficiency is lower than for glass-based cells, possible problems such as short-circuits—which often occur in fiber-based DSSCs—did not occur in this proof-of-concept. Since graphite particles did not fully cover the counter electrode in this first study, and the typical bathochromic shift indicating adsorption of dye molecules on the TiO2 layer was not observed, several ways are open to increase the efficiency in forthcoming studies.
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Isah, Kasim Uthman, Umar Ahmadu, Adamu Idris, Mohammed Isah Kimpa, Uno Essang Uno, Muhammed Muhammed Ndamitso, and Noble Alu. "Betalain Pigments as Natural Photosensitizers for Dye-Sensitized Solar Cells: The Effect of Dye pH on the Photoelectric Parameters." International Letters of Chemistry, Physics and Astronomy 55 (July 2015): 86–93. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.55.86.

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Dye-sensitized solar cells (DSSC) were fabricated using red Bougainvillea glabra flower dye extracts as natural dye sensitizers at three dye pH values of 1.23, 3.0 and 5.7. Water was used as dye extracting solvent. Dye-sensitized solar cells (DSSCs) from dye extract of pH 3.0 had the highest photocurrent density J of 3.72 mA/cm2 and fill factor FF of 0.59. While the DSSCs from dye sensitizer pHs of 1.23 and 5.7 had Jsc of 1.13 mA/cm2 and 2.27 mA/cm2, and fill factors of 0.43 and 0.61 respectively. The maximum powers Pmax of the DSSCs were 0.50, 1.64 and 0.94 mW/cm2 for dye sensitizer pH of 1.23, 3.0 and 5.7 respectively.
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Isah, Kasim Uthman, Umar Ahmadu, Adamu Idris, Mohammed Isah Kimpa, Uno Essang Uno, Muhammed Muhammed Ndamitso, and Noble Alu. "Betalain Pigments as Natural Photosensitizers for Dye-Sensitized Solar Cells: The Effect of Dye pH on the Photoelectric Parameters." International Letters of Chemistry, Physics and Astronomy 55 (July 3, 2015): 86–93. http://dx.doi.org/10.56431/p-nw0514.

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Dye-sensitized solar cells (DSSC) were fabricated using red Bougainvillea glabra flower dye extracts as natural dye sensitizers at three dye pH values of 1.23, 3.0 and 5.7. Water was used as dye extracting solvent. Dye-sensitized solar cells (DSSCs) from dye extract of pH 3.0 had the highest photocurrent density J of 3.72 mA/cm2 and fill factor FF of 0.59. While the DSSCs from dye sensitizer pHs of 1.23 and 5.7 had Jsc of 1.13 mA/cm2 and 2.27 mA/cm2, and fill factors of 0.43 and 0.61 respectively. The maximum powers Pmax of the DSSCs were 0.50, 1.64 and 0.94 mW/cm2 for dye sensitizer pH of 1.23, 3.0 and 5.7 respectively.
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Iftikhar, Haider, Gabriela Gava Sonai, Syed Ghufran Hashmi, Ana Flávia Nogueira, and Peter David Lund. "Progress on Electrolytes Development in Dye-Sensitized Solar Cells." Materials 12, no. 12 (June 21, 2019): 1998. http://dx.doi.org/10.3390/ma12121998.

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Dye-sensitized solar cells (DSSCs) have been intensely researched for more than two decades. Electrolyte formulations are one of the bottlenecks to their successful commercialization, since these result in trade-offs between the photovoltaic performance and long-term performance stability. The corrosive nature of the redox shuttles in the electrolytes is an additional limitation for industrial-scale production of DSSCs, especially with low cost metallic electrodes. Numerous electrolyte formulations have been developed and tested in various DSSC configurations to address the aforementioned challenges. Here, we comprehensively review the progress on the development and application of electrolytes for DSSCs. We particularly focus on the improvements that have been made in different types of electrolytes, which result in enhanced photovoltaic performance and long-term device stability of DSSCs. Several recently introduced electrolyte materials are reviewed, and the role of electrolytes in different DSSC device designs is critically assessed. To sum up, we provide an overview of recent trends in research on electrolytes for DSSCs and highlight the advantages and limitations of recently reported novel electrolyte compositions for producing low-cost and industrially scalable solar cell technology.
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Dissertations / Theses on the topic "Dye-sensitized Solar Cells (DSSCs)"

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Hasin, Panitat. "Developing New Types of Electrode Materials for Dye-Sensitized Solar Cells (DSSCs)." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1258071882.

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LONGHI, ELENA. "MOLECULAR DESIGN AND SYNTHESIS OF DYES FOR DYE-SENSITIZED SOLAR CELLS (DSSCS)." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/168368.

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ABSTRACT Background Solar energy plays a critical role in meeting the global energy challenge and represents one of the most promising energy sources for the future of the planet. Solar or photovoltaic cells are currently a hot topic on the market, these are devices that convert the energy of sunlight directly into electricity trough the photovoltaic effect. Strong and competitive research is currently devoted to lower the material costs of solar cells, and to increase their energy conversion efficiency. Up to now, commercially available photovoltaic technologies are based on inorganic materials, mainly crystalline silicon (first generation) and other semiconductors, such as gallium arsenide, indium phosphide and cadmium telluride (second generation In addition to high costs, also in terms of energy consuming, in fabrication processes, several of those materials are toxic and have low natural abundance. Therefore, in the last two decades the research focused on the development of a third generation of solar cells based on hybrid or organic materials, that offers a number of advantages, such as: high molar extinction coefficients, versatility of the chemical design for modulating the electronic properties, easy processability as well as low manufacturing costs. Although the efficiencies of organic-based photovoltaic cells ( 8%) are still at the moment a long way behind those obtained with purely inorganic based photovoltaic technologies ( 20%), the power conversion efficiency of organic solar cells have been significantly improved and there are expectations for more important results. Among the third generation of solar cells, the Dye-Sensitized Solar Cells (DSSC), also called Grätzel cells, have emerged as very promising candidates for low-cost alternative to conventional semiconductor photovoltaic devices. A DSSC cell scheme is shown in Figure 1. The cell components are: a mesoporous film of TiO2 (anode), a dye-sensitizer, an electrolyte, an electrochemical mediator and a cathode. The photovoltaic process in this cells can be resumed as follows: the dye-sensitizer (S), linked to semiconducting TiO2 surface (usually through a carboxylic group), absorbs a photon passing to the excited state S*, which transfers an electron to the conduction band of TiO2. The oxidized S+ thus obtained, is reduced by a redox mediator, generally I- from the couple I-/I3- dissolved in the electrolyte. The electron injected in TiO2 through the external circuit arrives to the cathode, where the reduction of I3- regenerates the iodide, closing the circuit. (Figure 1). Figure 1 The DSSC technology separates two requirements as: i) the charge generation, done at the semiconductor-dye interface and ii) the charge transport, done by the semiconductor and the electrolyte. Consequently, carrier transport properties can be improved by optimizing the semiconductor and electrolyte composition, while the spectral properties and thus charge generation can be improved by modifying the dye structure, that can be tailored in many ways by organic chemistry contribution. Many kinds of dyes have been studied for DSSCs application and in principle they could be divided in two classes (Figure 2): 1. metal complexes (N719, Zn-porphyrine e.g YD2-o-C8) , , 2. metal-free system Donor-Spacer-Acceptor (TA-St-CA) Figure 2 Up to now the best efficiencies (~11%) have been reached using ruthenium complexes, thanks to their large absorption range from visible to near infrared (NIR), and their capability to easily inject electrons in the conducting band of the semiconductor. The metal based chromophores still have several disadvantages such as not very high molar extinction coefficient and the presence of the expensive metal, such as ruthenium, which involves complicated synthesis and hard purification steps. On the contrary, metal-free dyes are simple and cheap to prepare and it is possible to easily modulate their photo- and electrochemical properties varying the functionalization, but very high efficiencies have not been achieved yet. The obtainment of new and more efficient dyes is therefore object of competitive international researches. Within this context, the present Ph.D. research project has focused on the synthesis of new metal-complexes and metal-free organic dyes characterized by a Donor-Spacer-Acceptor (D-π-A) structure, (Figure 3) in which the novelty is represented by the presence of benzo-condensed thiophene units as π bridge spacer. Figure 3 Aim of the work In such chromophores the π spacer plays a fundamental role, as it is responsible for the electronic communication between acceptor and donor moiety and for the extension of the conjugation that lead to wider and red-shifted absorption spectra. To date a number of new π-conjugated aromatic and heteroaromatic systems have been investigated and among these, thiophene or thienothiophene π-bridges have been reported to give remarkable efficiency. Benzodithiophenes systems BDT and BDT1 (Figure 4) attracted our attention because their rigid, π-conjugated, condensed-polycyclic structure , leads to unique electronic properties such as conductivity, high field effect mobility and tunable stacking in the solid state; rigid structures hamper the roto- vibrational modes responsible for the deactivation of the excited states in functional materials. Figure 4 In this Ph. D. work we investigated synthesis of suitably functionalized BDT and BDT1 derivatives as well as their use for the construction of two classes of dyes: 1) Zn-porphyrin based dyes (in collaboration with the research group of Prof. Pizzotti and Prof. Ugo) and 2) metal-free dyes and, Zn-porphyrin based dyes In addition the design of the new dyes have been oriented by preliminary theoretical calculations, done in collaboration with Dr. Filippo De Angelis of CNR-ISTM in Perugia, that allowed to gain insight into the molecular, ground and excited state electronic structure of the new chromophores. 1. Synthesis of new benzodithiophene containing Zn-porphyrins Metal porphyrins, characterised by very strong absorption bands around 450 nm (Soret band) and 600-700 nm (Q band) are potentially interesting as dyes for DSSC. For example, some push-pull type porphyrins bearing a carboxylic acid moiety as an anchoring group, have disclosed a remarkably high power conversion efficiency (6-7%), therefore in the recent years some research efforts have been devoted to the design, synthesis and application of new porphyrin-based chromophores for DSSC. , , The unique feature of these sensitizers is that the porphyrin chromophore itself constitutes the π-bridge of the D-π-A structure and with the aim of increasing the conjugation of the system, some new Zn porphyrins, containing the BDT1 unit (Figure 5), have been designed in our group. These porphyrin molecules are differently functionalized in 5,15 and 10,20 meso positions. In positions 5 and 15, aromatic rings bearing bulky groups are needed to avoid aggregation on the semiconductor surface, that drastically Figure 5 reduce the dye light-harvesting by a filtering effect. In 10,20 meso positions the structure presents two π-delocalized aromatic systems with opposite (electron-withdrawing or electron-donating) properties, in order to realize a push-pull system in which is possible to modulate the position and the intensity of the Q band and to favor the electron flow. The most promising structures were selected on the basis of preliminary theoretical calculations done by Dr. De Angelis and synthesized in collaboration with Prof. Ugo and Prof. Pizzotti’s research group. The novel Zn-porphyrin system 1 (Figure 6) was first synthesized, whose structure is characterized by the presence of BDT1 system in the acceptor part of the molecule. The suitable 2,6 di-functionalized BDT1 derivative was prepared and then linked to the porphyrin core. Figure 6 The resulting new Zn-porphyrin 1 was completely characterized from the analytical and photophysical point of view and used in preliminary tests as dye in Grätzel solar cells, giving an efficiency of 0.6%. Slightly optimization of the cell structure and in the composition of the electrolyte led to an increased efficiency of 2,54%. This result, although unsatisfactory, served as a starting point for the set-up of a number of synthetic protocols and for designing more targeted substitution and variation in the molecule structure. This part of the work is currently under progress. 2. Synthesis of benzodithiophene containing metal-free dye As already mentioned, the general structure of a metal-free dye, reported in Figure 3, presents a donor and an acceptor unit linked by a π-conjugate system. The most efficient structures reported in the literature contain triarylamines as donor unit, because of the prominent electron-donating ability and hole-transport of such molecules. Within this topic we designed novel metal-free triarylamine-containing organic dyes endowed with the innovative spacers BDT1 and its isomer BDT. Also in this case the design of the new compounds was oriented by preliminary TD-DFT calculations made by Dr. De Angelis, on two parent BDT1-containing structures 15 and 16, which differ from each other by the presence of a triple or a double bond. (Figure 7) With the aim to investigate the structure-performance relationship of the dyes in the cell, we designed a small library of structures, changing the BDT-bridge (17), the acceptor group (18) or the donor (19, 20) with respect of the model compound 16. (Figure 7). This allowed us to investigate the potentiality of BDT and BDT1 in the dyes in combination with double or triple bond in order to elongate the conjugation, and to obtain band gap reduction and enlarge the absorption spectra. In particular, the presence of the triple bond should ensures more planarity and therefore conjugation and avoids energy losses due to photoisomerization. The series of synthesized dyes are reported in figure 7. Figure 7 Almost all the dyes synthesized have also been characterized from a photophysical as well as electrochemical point of view, with the aim of identifying, among them, the most interesting and promising compounds for application in solar cells and try to clarify the relationship between the chemical structure and photovoltaic performances. Preliminary test in DSCs have been carried out for some of the dyes and among these dye 16 has emerged as the most promising one leading to an efficiency in liquid state cell of 5.11% and confirming the potential of BDT1 π-spacer for application in DSSCs. The cell efficiency found for 16, which is however still under optimization, allows us to say that this dye ranks among the promising dyes to date reported in literature. In addition, it must be pointed out that dye 16 seems to possess most of the essential chromophore characteristics required for obtaining high-performance DSSCs. The systematic study developed during the present Ph.D. thesis will be very useful for future improvement of the synthesized structures and their photovoltaic performances in DSSCs.
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Hua, Yong. "Design and synthesis of new organic dyes for highly efficient dye-sensitized solar cells (DSSCs)." HKBU Institutional Repository, 2014. https://repository.hkbu.edu.hk/etd_oa/71.

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Dye-sensitized solar cell (DSSC) has attracted increasing interest as a promising hybrid organic-inorganic solar cell. At the heart of the device is a photosensitizer, which is anchored onto a wide-bandgap semiconducting metal oxide. It harvests solar light and transfers the energy via electron transfer to a suitable material (e.g. TiO2) to produce electricityas opposed to chemical energy in plant. The topic of this thesis focuses on the design and synthesis of metal-free organic dyes for applications in DSSCs. Specific attention has been paid to the correlation between the molecular structures and physical properties, as well as their performances in DSSCs. Chapter 1 presents the major components and working principle of DSSC, following by a brief overview of the development of organic dyes and their application in DSSCs. In chapter 2, we have designed two types of new phenothiazine-based dyes to investigate the positioning effect a donor group on the cell performance. The structural features of a donor aryl group at the C(7) position of phenothiazine core extend the π-conjugation of the chromophore and efficiently suppress the dye aggregation on TiO2 film. As a result, Type 1 dyes have better light harvesting properties in contact with TiO2 films, and give much better photovoltaic performance than Type 2 dyes. Chapter 3 presents the synthesis and characterization of a series of simple phenothiazine-based dyes, in which, a linear electron-rich (4-hexyloxy)phenyl group at C(7) of the phenothiazine periphery as the donor, and an alkyl chain with different length at N(10). The dye molecules show a linear shape which is favorable for the formation of a compact dye layer on the TiO2 surface, while their butterfly conformations can sufficiently inhibit molecular aggregation. Moreover, the alkyl substituents with different chain length at N(10) could further optimize the performance through complete shielding the surface of TiO2 from the Iˉ/I3ˉ electrolyte. Under simulated AM 1.5G irradiation, the PT-C6 based DSSC produces a short-circuit photocurrent of 15.32 mAcm−2, an open-circuit photovoltage of 0.78 V, a fill factor of 0.69, corresponding to a power conversion efficiency (PCE) of 8.18%. Moreover, we designed a stepwise approach for co-adsorption of the organic dye PT-C6 with a porphyrin dye (ZnP) for DSSCs. Upon optimization, the device made of the PT-C6 + ZnP system yielded Jsc = 19.36 mA cm-2, Voc =0.735 V, FF = 0.71 and η = 10.10%. In chapter 4, we further developed five organic dyes appended with T, TT, E, ET, or EE (T and E denote thiophene and 3,4-ethylenedioxythiophene (EDOT), respectively) on the C(7) atom of phenothiazine core as electron donors. We have also analyzed the structure-performance corelations of dye molecules in the aspect of dye aggregation, electron injection, dye regeneration and interfacial charge recombination of electrons with electrolytes and/or oxidized dye molecules, through DFT calculation, impedance analysis and transient photovoltage studies. In chapter 5, we extended our studies by using phenothiazine as a building block to construct 3D bulky organic dyes. We systematically investigated the influence of 3D bulky substituents on dye aggregation and charge recombination, as well as photovoltaic performance of DSSCs. The molecular design strategy demonstrates that high Voc can be realized by employing 3D-phenothiazine dyes featuring a bulky substituent, such as, hexylcarbazole and dihexylfluorene units. Impressively, the co-adsorbent-free DSSCs based on dye TP3 exhibits a photovoltaic performance with efficiency up to 8.00 %. In order to realize a panchromatic absorption and further enhance the energy conversion efficiency of DSSCs, we also designed a stepwise approach for co-adsorption of the organic dye TP3 with a NIR dye YR6 for co-sensitized DSSCs. Upon optimization, the device made of the TP3 + YR6 system yielded Jsc = 19.18 mA cm-2, Voc =0.721 V, FF = 0.712 and η = 9.84 %. The power-conversion efficiency is the highest reported efficiency for a squaraine dye-based co-sensitized panchromatic DSSCs. From chapters 6 and 7, a series of new simple panchromatic dyes based on thiadiazolo[3,4-c]pyridine (PyT) have been designed for panchromatic DSSCs. These new organic dyes exhibit broad absorption spectrum in the range of 300~850 nm and high molar extinction coefficients. The electrochemical analyses demonstrate that the incorporation of the auxiliary electron-deficient thiadiazole[3,4-c]pyridine unit can fine-tune the HOMO and LUMO energy levels and red-shift the absorption spectra to NIR region. The overall conversion efficiencies of liquid-electrolyte DSSCs based on these sensitizers range from 0.46 to 6.30 %. We draw some conclusions in chapter 8 together with the outlooks in DSSCs
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Almodôvar, Vítor Alexandre da Silva. "Diketopyrrolopyrroles for dye-sensitized solar cells." Master's thesis, Universidade de Évora, 2017. http://hdl.handle.net/10174/22074.

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Com foco nos últimos seis anos, o sistema bicíclico dicetopirrolopirrol tem sido cada vez mais utilizado como ”bloco de construção” de materiais (polímeros e moléculas pequenas) para utilização em células solares. Isso deve-se principalmente à sua alta estabilidade ambiental (principalmente fotoestabilidade) e capacidades de transferência de carga. Apesar dos estudos serem ainda recentes, os resultados já alcançados mostraram o tremendo potencial dos dicetopirrolopirróis em células solares. O trabalho descrito nesta tese de Mestrado envolveu a síntese de vários derivados de dicetopirrolopirrol com o objetivo de introduzir unidades fotossensibilizantes ligadas covalentemente ao sistema dicetopirrolopirrol. Os novos compostos podem vir a incorporar um grupo carboxílico para suportar o corante na superfície de um óxido semicondutor das células solares sensibilizadas por corantes (DSSCs). A primeira parte do trabalho consistiu na alquilação ou arilação dos grupos NH de dicetopirrolopirróis comerciais. Posteriormente, foram estudados métodos de funcionalização dos grupos arilo nas posições 3 e 6 dos DPP por reações catalisadas por paládio ou por clorossulfonação. Todos os dicetopirrolopirróis sintetizados foram caracterizados por ressonância magnética nuclear, espetrometria de massa e espectrofotometria de UV-visível. Alguns compostos foram também caracterizados por fluorescência; Abstract: With a focus on the last six years, the bicyclic diketopyrrolopyrrole (DPP) system has been increasingly used as an active building block in materials (polymers and small molecules) used in solar cells. That is mainly due to its high environmental stability (mainly photostability) and charge transfer capabilities. Despite its infancy, the results already achieved have shown the tremendous potential of diketopyrrolopyrroles in solar cells. The work reported in this Master thesis involved the synthesis of several diketopyrrolopyrrole derivatives aiming introducing photosensitizing units covalently linked to the diketopyrrolopyrrole system. The new compounds may be functionalized with carboxylic groups to support the dye firmly at the surface of a semiconductor oxide of dye-sensitized solar cells (DSSCs). The first part of the work consisted in the alkylation or arylation of the NH groups of commercially available DPP. Then, new methods for the functionalization of the aryl groups at 3 and 6 positions of DPP were studied, mainly by palladium catalysed reactions or by chlorosulfonation. All diketopyrrolopyrrole derivatives synthesized were characterized by nuclear magnetic resonance, mass spectrometry and UV-vis spectrophotometry. Some compounds were also characterized by fluorescence.
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Li, Sin-lai Emily, and 李倩麗. "Theoretical study of dye-sensitized solar cell (DSSC)." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B41897195.

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Li, Sin-lai Emily. "Theoretical study of dye-sensitized solar cell (DSSC)." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B41897195.

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DELL'ORTO, ELISA CAMILLA. "Dye sensitized solar cells: materials and processes." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2012. http://hdl.handle.net/10281/28476.

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During the thesis the DSSCs optimization was analyzed mainly through two strategies: the study of new sensitizers and the study of alternatives materials for photo-cathode fabrication. Two class of sensitizers were be analyzed: squaraine dyes and cyclometalated-based dyes. Then a study on dye-loading process will be presented, with implication in an industrialization process. For the photo-cathode fabrication two di erent materials were studied, a carbon based material and a polymeric material. Then a part of the work concerned the study of devices analysis system. In particular electrochemical impedance spectroscopy was studied to propose a new set up to analyze electric processes in different cell components.3
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Hernández, Redondo Ana. "Copper(I) polypyridine complexes : the sensitizers of the future for dye-sensitized solar cells (DSSCs) /." [S.l.] : [s.n.], 2009. http://edoc.unibas.ch/diss/DissB_8757.

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MARCHINI, EDOARDO. "New Components for Dye Sensitized Solar Cells." Doctoral thesis, Università degli studi di Ferrara, 2022. http://hdl.handle.net/11392/2496481.

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Due to the strong increase in the world energy consumption, and need of exploiting carbon neutral energy sources, increasing efforts have been devoted to the exploitation of solar energy technology. For their unique properties, Dye Sensitized Solar Cells (DSSC) could complement the established silicon junctions. This Ph.D. thesis is mainly focused on the understanding of the (photo)/electrochemical properties of new components for DSSCs. The first chapter, realized in collaboration with the Prof. Stagni’s group, is about the characterization of new examples of Ru(II)-tetrazolato dyes as thiocyanate-free sensitizers for solar cell applications. Four complexes (D1-D4) have been analyzed together with the well know standard N719. The combination of the electrochemical and spectroscopic analyses revealed ground and excited states thermodynamic properties suitable for efficient interfacial charge separation. These features resulted in external quantum yield of photon to electron conversions higher than 80%. The best performances have been recorded in the case of D4 thanks to the combinations of the broader harvesting, efficient regeneration, and electron injection. Three chapters of my thesis report about the collaborative research carried out with the groups led by Dr. P.C. Gros and Dr. M.C. Pastore, involving the investigation of the electronic properties of Fe(II)NHC (NHC=N-Heterocyclic-Carbene) sensitizers. First, we tried to rationalize the charge transfer dynamics of C1 a homoleptic complex bearing σ-donating NHCs and π-accepting carboxylic groups, which initially reported rather low performances (0.13 % of PCE%). We achieved a substantial progress in cell efficiency (PCE = 1%). We estimated an injection quantum yield (Φinj) of ca. 50% that, is believed to be the main limitation for the rather low PCE. In consideration of the excited state energetics, nearly optimal for injection into TiO2, this relatively low Φinj could be due to a non-optimal electronic coupling arising from the symmetric design of the homoleptic C1. For this reason, we moved to Fe(II)NHC heteroleptic designs characterized by an asymmetric coordination sphere. The first complex was the asymmetric analogue of C1 named ARM13, while other design incorporated spacers between the anchoring moieties and the pyridine linked to the metal center, in particular, a thiophene in the case of ARM7 and a phenyl ring in the case of ARM11. The rationale behind such designs was to increase the electron-hole separation and the light harvesting capability. We were able to obtain the highest power conversion efficiency (ARM13 ca. 1.5%) ever reported for a Fe(II) sensitizer. In a third project, we designed, realized and characterized a new family of heteroleptic Fe(II)NHC complexes bearing electron withdrawing or donating substituents on the ancillary ligands. In particular, among the new series, ARM130 bearing a dimethoxyphenyl group, exhibited the best performance, thanks to its improved light harvesting capability introduced by the electron-donating -OMe moieties. We obtained a Power Conversion Efficiency of 1.83%. The last chapter of my thesis is about the investigations of alternative counter electrode (CE) materials for DSSCs based on the poly(3,4-ethylenedioxythiophene) (PEDOT) conductive polymer. The best and well-known electrocatalyst PEDOT/ClO4 (PER) involves the use of organic solvents, greener and sustainable alternative deposition routes are desirable. We explored the electrochemical properties of PEDOT/Nafion CE (NAF), produced through water- based electropolymerization. The electrocatalytic behavior of PER and NAF has been investigated in STLC by means of LSV and EIS, in the presence of either Co- or Cu- based electrolyte, NAF rivals the kinetic and mass transport properties of PER. This result was confirmed by the performance of D35 sensitized solar cells, where NAF counter electrodes generated comparable efficiency of those recorded for PER.
A causa dell’aumento della richiesta energetica e della necessità di esplorare risorse sostenibili, ingenti sforzi sono rivolti verso l’applicazione di tecnologia solare. Grazie alle loro peculiarità, le Celle Solari Sensibilizzate con Colorante (DSSCs) potrebbero essere uno strumento complementare alla tecnologia al silicio. Questa tesi di Dottorato è incentrata nella comprensione delle proprietà (foto)/elettrochimiche di nuovi componenti per DSSCs. Il primo capitolo sperimentale, realizzato in collaborazione con il gruppo del Prof. Stagni, ha avuto come scopo la caratterizzazione di nuovi sensibilizzatori di Ru(II)-tetrazolati come esempio di complessi privi di leganti tiocianati. Quattro complessi (D1-D4) sono stati studiati assieme al ben noto standard di rutenio N719. La combinazione dell’analisi elettrochimica e spettroscopica ha evidenziato come la termodinamica dello stato fondamentale ed eccitato sia in grado di favorire un’efficiente separazione di carica. Queste caratteristiche hanno portato ad una resa quantica di conversione di fotoni in elettroni superiore all’80%. D4 è risultato essere il complesso più efficiente grazie alla combinazione della più estesa estensione spettrale, efficiente rigenerazione ed efficiente iniezione di carica. Gran parte della mia attività, tuttavia, è stata rivolta allo studio di sensibilizzatori per DSSCs a base di ferro. Tre capitoli, in collaborazione con i gruppi del Dr. P. C. Gros e dalla Dr. M. C. Pastore, riportano l’investigazione delle proprietà elettroniche di sensibilizzatori di Fe(II)NHC. Nel primo di questi abbiamo studiato le proprietà di trasferimento dinamiche di un complesso omolettico denominato C1, caratterizzato da leganti NHC σ-donatori e gruppi carbossilici π-accettori, il quale aveva inizialmente restituito valori di efficienza dello 0.13%. Abbiamo ottenuto un sostanziale aumento di efficienza ottenendo valori vicini all’1%. Il rendimento quantico di iniezione di carica è risultato essere attorno al 50% e costituisce il principale fattore limitante per le DSSCs a base di ferro. L’energetica dello stato eccitato è risultata ottimale per un’efficiente iniezione di carica quindi, le limitate prestazioni esibite da C1 derivano dal suo design simmetrico che porta ad un accoppiamento elettronico non favorevole con la superficie. Abbiamo così analizzato complessi carbenici eterolettici, il primo di questi era l’analogo asimmetrico di C1, ARM13, altri due invece erano caratterizzati dall’introduzione di un anello tiofenico (ARM7) e uno fenilico (ARM11) aventi la funzione di spaziatori fra le funzionalità ancoranti e le piridine coordinate al metallo centrale. L’idea di questo nuovo design era quella di aumentare la separazione di carica ed incrementare la capacità di raccolta di fotoni. Abbiamo ottenuto la più alta efficienza di cella riportata in letteratura del 1.5% per ARM13. In un terzo progetto abbiamo analizzato una nuova famiglia di complessi eterolettici caratterizzati dall’introduzione di gruppi elettron-donatori o elettron-attrattori sui leganti ancillari. ARM130, caratterizzato da una funzionalità dimetossifenilica, ha restituito le migliori performances dell’1.83%. L’ultimo capitolo della mia tesi riguarda invece lo studio di un controelettrodo (CE) alternativo per DSSCs basato su polimeri conduttori a base di poli(3,4-etilendiossitiofene) (PEDOT), fra questi il ben noto PEDOT/ClO4 (PER), elettropolimerizzato da solventi organici, risulta essere il miglior materiale elettrocatalitico. Al fine di studiare soluzioni più sostenibile, abbiamo esplorato le proprietà elettrochimiche di CE a base di PEDOT/Nafion (NAF) prodotti in ambiente acquoso. Il comportamento elettrocatalitico di PER e NAF è stato investigato in celle simmetriche mediante LSV ed EIS e in celle solari in presenza di D35, quest’ultimo ha generato efficienze di cella comparabili a quelle registrate in presenza di PER.
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Delices, Annette. "Organized Organic Dye / Hole Transporting Materials for TiO2- and ZnO- based Solid-State Dye-Sensitized Solar Cells (s-DSSCs)." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCC066/document.

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En raison des problèmes d'instabilité à moyen termes des cellules solaires à colorant (DSSC), l'électrolyte liquide à base d'iodure a été remplacé par plusieurs types de matériaux solides transport de trous (HTM) pour obtenir des DSSCs à l'état solide (s-DSSCs). Parmi ces matériaux, l’utilisation des polymères conducteurs(PC) a attiré une attention considérable en raison de leur bonne stabilité, de leur haute conductivité et de la facilité de leur dépôt sur le semi-conducteur mésoporeux TiO2. Dans ce travail de thèse, plusieurs s-DSSCs basées sur des PC utilisés comme HTM ont été développés dans le but d'améliorer leurs performances photovoltaïques en tenant compte des deux objectifs suivants: (i) l'optimisation des processus de transfert inter facial de charge dans la cellule solaire, et (ii) l'optimisation du transport de charge dans le semi-conducteur d'oxyde de type n. Pour atteindre ces objectifs, chaque composant de la s-DSSC a été modifié afin d'étudier son effet sur les performances du dispositif final. En première tentative, une étude analytique est réalisée en faisant varier le sensibilisateur afin de déterminer les fragments de la structure du colorant, qui ont un effet important sur le processus de photopolymérization électrochimique in-situ (PEP) à la fois en milieu organique et en milieu aqueux mais aussi sur les performances des s-DSSCs. Sur la base de ces résultats, un nouveau concept a été développé et consiste en la suppression totale de l'interface entre le colorant et le HTM. Ceci est obtenu par la synthèse de nouveaux colorants liés de façon covalente à un monomère électroactif qui est co-polymérisé par la PEP in-situ. Le copolymère résultant, utilisé comme HTM, est lié de manière covalente au colorant. En outre, la nature de la liaison chimique, reliant le résidu triphénylamine TPA au monomère, est également étudiée comme un facteur clé dans les performances de s-DSSC. En outre, et pour optimiser les processus de transport de charges dans ce type de s-DSSC, de nouvelles s-DSSC basées sur ZnO ont été réalisées et étudiées
Due to instability problems of dye sensitized solar cells (DSSCs) in longtime uses, the iodine based liquidelectrolyte has been replaced by several types of solid hole transporting materials (HTM) to perform solidstate DSSCs (s-DSSCs). Among them, the substitution by conducting polymers (CP) has attractedconsiderable attention because of their good stability, high hole-conductivity and simple deposition withinthe mesoporous TiO2 semiconductor. In this thesis work, several s-DSSCs based on CPs used as HTM havebeen developed in order to improve their photovoltaic performances taking into account the following twoobjectives: (i) the optimization of the interfacial charge transfer processes within the solar cell, and (ii) theoptimization of the charge transport within the n-type oxide semiconductor. To reach these goals, eachcomponent that constitutes the device was varied in order to investigate its effect on the device’sperformances. As first attempt, an analytical study is carried out by varying the sensitizer in order todetermine the fragments of the dyes structures, that have an important effect on the in-situ photoelectrochemical polymerization process (PEP) both in organic and in aqueous media and hence on theperformances of the s-DSSCs. Based on these results, a new concept of removing completely the interfacebetween the dye and the HTM is developed. This is achieved by the synthesis of new dyes covalently linkedto an electroactive monomer which is co-polymerized by in-situ PEP. The resulting co-polymer, used asHTM, is covalently linked to the dye. In addition, the nature of the chemical bond linking the triphenylamineresidue TPA to the monomer is also investigated as a key factor in the s-DSSCs performances. Besides, andto optimize the charge transport processes within this type of s-DSSC, the elaboration of novel ZnO baseds-DSSCs has been achieved and investigated
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Books on the topic "Dye-sensitized Solar Cells (DSSCs)"

1

Kosyachenko, Leonid A. Solar cells: Dye-sensitized devices. Rijeka, Croatia: InTech, 2011.

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Travino, Michael R. Dye-sensitized solar cells and solar cell performance. Hauppauge, N.Y: Nova Science Publisher, 2011.

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A new sight towards dye-sensitized solar cells: Material and theoretical. Stafa-Zurich: Trans Tech Publications, 2011.

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Yun, Sining, and Anders Hagfeldt, eds. Counter Electrodes for Dye-sensitized and Perovskite Solar Cells. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527813636.

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Arakawa, Hironori. Shikiso zōkan taiyō denchi no saishin gijutsu. Tōkyō: Shīemushī Suppan, 2001.

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Z, Zhang Jin, Clark Hal, California Energy Commission. Energy Innovations Small Grant Program., and California Energy Commission. Public Interest Energy Research., eds. Development and characterization of improved solid state dye-sensitized nanocrystalline solar cells. [Sacramento, Calif.]: Public Interest Energy Research, California Energy Commission, 2003.

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Pandikumar, Alagarsamy, and R. Jothilakshmi. Potential development in dye-sensitized solar cells for renewable energy. Durnten-Zurich: Trans Tech Publications Ltd, 2014.

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Yŏnʼguwŏn, Hanʼguk Chŏnja Tʻongsin, and Korea (South) Chŏngbo Tʻongsinbu, eds. Chʻa sedae PC-yong ioniksŭ soja kaebal =: Development of ionics device for operating next-generation PC. [Seoul]: Chŏngbo Tʻongsinbu, 2005.

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Jinkō kōgōsei to yūkikei taiyō denchi: Saishin no gijutsu to sono kenkyū kaihatsu = Artificial photosynthesis and organic solar cell. Kyōto-shi: Kagaku Dōjin, 2010.

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Dye-Sensitized Solar Cells. Elsevier, 2022. http://dx.doi.org/10.1016/c2018-0-03160-6.

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Book chapters on the topic "Dye-sensitized Solar Cells (DSSCs)"

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Ma, Lanchao, and Xiaowei Zhan. "Dye-Sensitized Solar Cells (DSSCs)." In Organic Optoelectronics, 437–65. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527653454.ch10.

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Zhou, Xiao, Chen Wang, Yangliang Zhang, Wen Fang, Yuzhi Hou, Chen Zhang, Xiaodong Wang, and Sining Yun. "Cell Efficiency Table of DSSCs with Various Counter Electrode Electrocatalysts." In Counter Electrodes for Dye-sensitized and Perovskite Solar Cells, 531–617. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527813636.app1.

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Kumar, Rahul, and Parag Bhargava. "Counter Electrodes in DSSCs Based on Carbon Derived from Edible Sources." In Counter Electrodes for Dye-sensitized and Perovskite Solar Cells, 71–92. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527813636.ch4.

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Ayele, Delele W., Wei-Nein Su, John Rick, Hung-Ming Chen, Chun-Jern Pan, Nibret G. Akalework, and Bing-Joe Hwang. "Organometallic Compounds for Dye-Sensitized Solar Cells (DSSC)." In Advances in Organometallic Chemistry and Catalysis, 501–11. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118742952.ch38.

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Alami, Abdul Hai, Shamma Alasad, Haya Aljaghoub, Mohamad Ayoub, Adnan Alashkar, Ayman Mdallal, and Ranem Hasan. "Third-Generation Photovoltaics: Dye-Sensitized Solar Cells (DSSC)." In Advances in Science, Technology & Innovation, 77–91. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-31349-3_7.

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Munukutla, Lakshmi V., Aung Htun, Sailaja Radhakrishanan, Laura Main, and Arunachala M. Kannan. "Dye-Sensitized Solar Cells." In Solar Cell Nanotechnology, 159–84. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118845721.ch6.

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Zhang, Chunfu, Jincheng Zhang, Xiaohua Ma, and Qian Feng. "Dye-Sensitized Solar Cell." In Semiconductor Photovoltaic Cells, 325–72. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9480-9_8.

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Hara, Kohjiro, and Shogo Mori. "Dye-Sensitized Solar Cells." In Handbook of Photovoltaic Science and Engineering, 642–74. Chichester, UK: John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9780470974704.ch15.

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Hara, Kohjiro, and Hironori Arakawa. "Dye-Sensitized Solar Cells." In Handbook of Photovoltaic Science and Engineering, 663–700. Chichester, UK: John Wiley & Sons, Ltd, 2005. http://dx.doi.org/10.1002/0470014008.ch15.

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Godin, Biana, Elka Touitou, Rajaram Krishnan, Michael J. Heller, Nicolas G. Green, Hossein Nili, David J. Bakewell, et al. "Dye Sensitized Solar Cells." In Encyclopedia of Nanotechnology, 604. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_100196.

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Conference papers on the topic "Dye-sensitized Solar Cells (DSSCs)"

1

Nguyen, Crystal, Daniel Volpe, William Wilson, Mansour Zenouzi, and Jason Avent. "Efficiency Experiments on Modified Dye Sensitized Solar Cells." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68773.

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Dye Sensitized Solar Cells (DSSC) is a relatively new form of solar panels which use a photo reactive dye and electrolytic cell to capture sunlight and turn it into electricity. The efficiency of DSSCs is about 10% but they are much less expensive to produce than silicon solar cells. The carbon dioxide release from DSSC manufacture is much less than a silicon solar cell, so DSSCs pay back their greenhouse gas emissions rapidly, while many silicon panels may never pay back the pollution they require to manufacture. Because of greater efficiency, silicon solar cells still produce power more cheaply than DSSC. Slight improvements to efficiency or reduction in cost would make these solar panels a more cost effective solution for photovoltaic power. A standard DSSC was built and compared to a modified version using a graphite layer instead of platinum. Surprisingly, the graphite panel outperformed the platinum panel. This is thought to be a result of inexperienced manufacturing. Recommendations for improvements for the experiment are outlined.
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Li, Jinwei, and Yong Shi. "Electron Transport and Recombination in TiO2 Nanofiber Dye Sensitized Solar Cell." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64979.

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Dye sensitized solar cells (DSSCs), a new type of photo-electrochemical solar cells, are a promising alternative to the silicon based photovoltaic because they hold advantages of low cost, simple manufacturing processes and higher conversion efficiency compared with other types of excitonic solar cell. DSSCs with conversion efficiencies of up to 11% have been achieved with a highly stable electrolyte under AM1.5G conditions. Recently, one dimensional (1D) electrospun TiO2 nanofibers have been used as the DSSC photoanode to improve the electron transport efficiency and enhance the light harvest efficiency by scattering more light in the red part of the solar spectrum. In this paper, stepped light induced transient measurement of photocurrent and voltage (SLIM-PCV) has been employed to study electron transport and recombination in DSSCs. Electron diffusion coefficients and electron lifetimes were measured with differing light intensities. The electron diffusion coefficients and electron lifetimes strong correlate with intensity, which indicates the trap limited diffusion process for electrons in the TiO2 nanofiber DSSC.
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James, Sagil, Rinkesh Contractor, Chris Veyna, and Galen Jiang. "Fabrication of Efficient Electrodes for Dye-Sensitized Solar Cells Using Additive Manufacturing." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6709.

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Dye-Sensitized Solar Cells (DSSC) are third generation solar cells used as an alternative to c-Si solar cells. DSSC are mostly flexible, easier to handle and are less susceptible to damage compared to c-Si solar cells. Additionally, DSSC is an excellent choice for indoor application as they perform better under diverse light condition. Most DSSCs are made of liquid medium sandwiched between two conductive polymer layers. However, DSSCs have significantly lower efficiencies compared to silicon solar cells. Also, use of liquid medium resulting in leaking of liquid, and occasional freezing during cold weather, and thermal expansion during hot weather conditions. DSSC can be manufactured in small quantities using relatively inexpensive solution-phase techniques such as roll-to-roll processing and screen printing technology. However, scaling-up the DSSC manufacturing from small-scale laboratory tests to sizeable industrial production requires better and efficient manufacturing processes. This research studies the feasibility of using additive manufacturing technique to fabricate electrodes of DSSC. The study aims to overcome the limitations of DSSCs including preventing leakage and providing more customized design. Experimental studies are performed to evaluate the effects of critical process parameters affecting the quality of electrodes for DSSC. Volume resistivity test is performed to evaluate the efficiency of the electrodes. In this study, the electrodes of DSSC are successfully fabricated using Fused Disposition Modeling (FDM) 3D printing technique. The results of this study would enable additive manufacturing technology towards rapid commercialization of DSSC technology.
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Sheehan, Stephen, Mahfujir Rahman, and Denis Downling. "Influence of Atmospheric Plasma Jet Pre-Treatments of TiO2 Electrodes on Dye Adhesion and DSSC Cell performance." In 13th International Conference on Plasma Surface Engineering September 10 - 14, 2012, in Garmisch-Partenkirchen, Germany. Linköping University Electronic Press, 2013. http://dx.doi.org/10.3384/wcc2.1-5.

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Dye-sensitized solar cells (DSSC) based on nanocrystalline TiO2 were invented by O’Regan and Gratzel in 1991. DSSC are third generation, thin film solar cells. They are photoelectrochemical devices whose operating principle closely resembles the photosynthesis reaction of green plants. There is increasing interest in dye-sensitized solar cells (DSSCs) due to their relatively low cost and ease of manufacture. However, the performance of the DSSC solar cell in many cases is limited by the presence of oxygen vacancy (- Ti3+ defects site) along with surface contamination in the TiO2 electrode. To improve current density and the overall efficiency of the DSSCs surface contamination and surface defects need to be reduced. This study investigated the influence of plasma surface treatments of nanocrystalline TiO2 films on photovoltaic performance of the corresponding DSSCs. Two surface treatments, PlasmaTreat™ an atmospheric air plasma system and a Microwave (MW) plasma system were used for the first time to study the effect of plasma surface treatment of TiO2 on DSSC performance.
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James, Sagil, and Karan Parikh. "Study on Selective Electroless Plating of 3D Printed Counter Electrodes for Dye-Sensitized Solar Cells." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2887.

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Abstract Dye-Sensitized solar cells (DSSC) are considered to be the replacement for traditional silicon solar cells. DSSCs have been noticed widely due to its simplified material handling, easy fabrication, durability and their ability to perform better under diverse lighting conditions. However, there are significant challenges that are faced by DSSCs such as lower efficiency, chemical instability, and leakage of the electrolyte under high-temperature conditions. The fabrication of counter electrodes for DSSCs require the use of expensive materials and techniques which increases the cost as well as limits mass production. These limitations can be addressed through a cost-effective fabrication process for counter electrodes of DSSCs. This research focuses on enhancing the conductivity and catalytic activity of the counter electrodes of DSSCs through a novel selective electroless plating technique. The proposed selective electroless plating technique helps to overcome the issues of high cost, toxicity, and complex manufacturing processing of conventional DSSC. Moreover, the fabrication of the DSSC is supplemented using additive manufacturing technology. The technique further helps to enhance the performance, provide excellent design flexibility while reducing the manufacturing cost. The results of the study show selective electroless plating is an effective technique for the fabrication of low-cost counter electrodes for DSSCs. The efficiencies of the DSSC are comparable with DSSC fabricated through conventional expensive and toxic materials.
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Li, Jinwei, Shiyou Xu, and Yong Shi. "TiO2 Nanofibers Based Dye-Sensitized Solar Cells." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-13027.

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Dye sensitized solar cells (DSSCs) are promising photovoltaic devices as they offer advantages such as low cost and easy for fabrication et al. The key part of the original DSSC is a sintered film of nanoparticles which has a large surface area for the absorption of dyes. It has been reported that boundaries of nanoparticles diminish the efficiency of charge transport in the nanoparticle network, and lead to charge–carrier recombination. The one dimensional morphology of the nanofiber is believed to improve electron transport efficiency without sacrificing the high specific surface area for the adsorption of dyes. In this paper, TiO2 nanofibers are used to replace TiO2 nanoparticles in the DSSC. The film of nanofibers was synthesized by electrospinning process and collected on the transparent conductive glass substrate. The precursor used for the electrospinning of the nanofiber consists of titanium (IV) isopropoxide, acetate acid, ethanol and polyvinylpyrrolidone(PVP). After the electrospinning process, nanofibers were pretreated at 120°C for 2 hours and annealed at 500°C in atmosphere for another 2 hours. Then DSSC with the film of TiO2 nanofibers were assembled and characterized through electrical measurements. Open circuit voltage of 0.7V and short circuit current densities of 0.45mA/cm2 were achieved.
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Shakir, Sehar, and Hafiz M. Abd-ur-Rehman. "Enhancement in Photovoltaic Performance of Dye Sensitized Solar Cells Using Cu and Cu:Ag Co-Doped TiO2 Photoanode." In ASME 2016 Power Conference collocated with the ASME 2016 10th International Conference on Energy Sustainability and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/power2016-59477.

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Dye Sensitized Solar Cells (DSSCs) are low cost solar cells offering big room for improvements in its photovoltaic performance by maneuvering semiconductor properties, dye adsorption, electrolyte stability etc. For the first time, we have co-doped TiO2 with silver (Ag) and copper (Cu) to enhance both charge collection and light absorption as well as reduce recombinations for DSSCs. For high solar cell efficiency 3wt% Cu and 3wt% Cu:Ag doped TiO2 nps were successfully prepared for Dye Sensitized Solar Cells (DSSCs). Modified photoanode was prepared using surface adsorbed N719 dye on doctor blade coated TiO2, Cu:TiO2 and Cu:Ag:TiO2 thin films. It was observed that optimum doping concentration of Cu and silver was 3wt% each. DSSCs with Cu:Ag:TiO2 thin film showed higher conversion efficiency under full sunlight illumination when compared to DSSCs assembled using Cu:TiO2 and undoped TiO2. The obtained efficiencies for DSSCs with undoped TiO2, Cu:TiO2 and Cu:Ag:TiO2 photoanodes were 2%, 2.7% and 4.5% respectively. Solar cells assembled with Cu only doped TiO2 electrode when compared with cells assembled using pristine TiO2, showed an increase in Voc while Jsc was decreased Furthermore, cells doped with both Ag and Cu showed enhancement in both Voc and Jsc. The enhancement in cell performance has been discussed in context of morphology, crystal phase, presence of bonds etc. in nanoparticles. Considering overall better performance, Cu:Ag doped TiO2 photoanodes can be considered as potential photoanodes in DSSCs.
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Sayer, Robert A., Stephen L. Hodson, and Timothy S. Fisher. "Improved Efficiency of Dye Sensitized Solar Cells Using Aligned Carbon Nanotubes." In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90331.

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Dye sensitized solar cells (DSSCs) offer many advantages in comparison to their Si-based counterparts, including lower cost of raw materials, faster manufacturing time, and the ability to be integrated with flexible substrates. Although many advances have been made in DSSC fabrication over recent years, their efficiency remains lower than commercially available Si photovoltaic cells. Here we report improved efficiency of TiO2/anthocyanin dye solar cell using aligned arrays of carbon nanotubes (CNTs) as a counter electrode. Dense vertically oriented CNT arrays are grown directly on the counter electrode using microwave plasma chemical vapor deposition and a tri-layer (Ti/Al/Fe) catalyst. The resulting arrays are 30 micrometers in height and have a number density of approximately five hundred million per square millimeter. By directly growing the CNTs on the counter electrode substrate, electrical interface conductance is enhanced. The performance of both as-grown and N-doped (using a nitrogen plasma) CNT arrays is reported. The fabricated DSSCs are tested under AM1.5 light. Increased short circuit current is observed in comparison to graphite and Pt counter electrodes. We attribute this improvement to the large surface area created by the 3D structure of the arrays in comparison to the planar geometry of the graphite and Pt electrodes as well as the excellent electrical properties of the CNTs.
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Peng, Edwin, and Halil Berberoglu. "Fabrication of a Dye Sensitized Solar Cell and Its Performance Dependence on Temperature and Irradiance." In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44349.

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This paper reports the temperature and irradiance dependence of dye-sensitized solar cells (DSSCs) with acetonitrile-based electrolytes. The prototyped DSSCs had nanocrystalline titanium dioxide photoanodes and platinum thin film cathode. The photoanodes were sensitized with N-749 dye. The current-voltage characteristics of the DSSCs were measured at temperatures from 5 to 50 °C and under 500, 1000, and 1500 W m−2 irradiance. The open circuit voltage, VOC, decreased linearly with increasing temperature and had positive, logarithmic relation with irradiance. At temperatures lower than 15 °C, short circuit current density, JSC, was limited by the diffusion of I3− in the electrolyte and increased with increasing temperature. At higher temperatures the recombination of electrons injected into the TiO2 conduction band was dominant over diffusion and JSC decreased with increasing temperature. Moreover, JSC increaed linearly with increasing irradiance. The DSSC photoconversion efficiency did not vary appreciably at temperatures lower than 15 °C but decreased with increasing temperature. Finally, the efficiency increased with increasing irradiance.
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Subodro, Rohmat, Budi Kristiawan, Ari Handono Ramelan, Sayekti Wahyuningsih, Hanik Munawaroh, Qonita Awliya Hanif, and Liya Nikmatul Maula Zulfa Saputri. "Dye-Sensitized Solar Cells (DSSCs) reengineering using TiO2 with natural dye (anthocyanin)." In INTERNATIONAL CONFERENCE ON ENGINEERING, SCIENCE AND NANOTECHNOLOGY 2016 (ICESNANO 2016). Author(s), 2017. http://dx.doi.org/10.1063/1.4968357.

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Reports on the topic "Dye-sensitized Solar Cells (DSSCs)"

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Sweeney, Charles B., Mark Bundy, Mark Griep, and Shashi P. Karna. Ionic Liquid Electrolytes for Flexible Dye-Sensitized Solar Cells. Fort Belvoir, VA: Defense Technical Information Center, September 2014. http://dx.doi.org/10.21236/ada611102.

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James, Keith. The Effects of Phosphonic Acids in Dye-Sensitized Solar Cells. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.2946.

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HANNA, LAUREN, and PATRICK WARD. ENHANCING CHARGE INJECTION IN POLYOXOMETALATE-BASED DYE-SENSITIZED SOLAR CELLS. Office of Scientific and Technical Information (OSTI), September 2022. http://dx.doi.org/10.2172/1891252.

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Cramer, Hailey E., Mark H. Griep, and Shashi P. Karna. Synthesis, Characterization, and Application of Gold Nanoparticles in Green Nanochemistry Dye-Sensitized Solar Cells. Fort Belvoir, VA: Defense Technical Information Center, June 2012. http://dx.doi.org/10.21236/ada568748.

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Hamann, Thomas. Molecular and Material Approaches to Overcome Kinetic and Energetic Constraints in Dye-Sensitized Solar Cells. Office of Scientific and Technical Information (OSTI), August 2016. http://dx.doi.org/10.2172/1338205.

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Elliott, C. Michael, and Amy L. Prieto. Transition Metal Polypyridine Complexes: Studies of Mediation in Dye-Sensitized Solar Cells and Charge Separation. Office of Scientific and Technical Information (OSTI), February 2017. http://dx.doi.org/10.2172/1342993.

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Chauhan, Rahul. Development of dye-sensitized solar cells using algal-based natural dyes for climate change mitigation. Peeref, December 2022. http://dx.doi.org/10.54985/peeref.2212p1968754.

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