Relevant bibliographies by topics / Optical concentrators

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Optical concentrators'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Optical concentrators"

1

Timinger, Andreas, Abraham Kribus, Harald Ries, Toni Smith, and Markus Walther. "Optical assessment of nonimaging concentrators." Applied Optics 39, no. 31 (November 1, 2000): 5679. http://dx.doi.org/10.1364/ao.39.005679.

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Chen, Yi-Cheng, and Chia-Chi You. "Optimal Design of a Secondary Optical Element for a Noncoplanar Two-Reflector Solar Concentrator." International Journal of Photoenergy 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/861353.

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This paper presents the results of a parametric design process used to achieve an optimal secondary optical element (SOE) in a noncoplanar solar concentrator composed of two reflectors. The noncoplanar solar concentrator comprises a primary parabolic mirror (M1) and a secondary hyperbolic mirror (M2). The optical performance (i.e., acceptance angle, optical efficiency, and irradiance distribution) of concentrators with various SOEs was compared using ray-tracing simulation. The parametric design process for the SOE was divided into two phases, and an optimal SOE was obtained. The sensitivity to assembly errors of the solar concentrator when using the optimal SOE was studied and the findings are discussed.
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Yiu-Wing Leung. "Lightpath concentrators for all-optical networks." Journal of Lightwave Technology 24, no. 9 (September 2006): 3259–67. http://dx.doi.org/10.1109/jlt.2006.878496.

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Fraidenraich, N., and G. J. Almeida. "Optical properties of V-trough concentrators." Solar Energy 47, no. 3 (1991): 147–55. http://dx.doi.org/10.1016/0038-092x(91)90073-6.

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Mansour, A. F. "Optical efficiency and optical properties of luminescent solar concentrators." Polymer Testing 17, no. 5 (August 1998): 333–43. http://dx.doi.org/10.1016/s0142-9418(97)00061-5.

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Xuan, Qingdong, Guiqiang Li, Yashun Lu, Xudong Zhao, Yuehong Su, Jie Ji, and Gang Pei. "A general optimization strategy for the annual performance enhancement of a solar concentrating system incorporated in the south-facing wall of a building." Indoor and Built Environment 29, no. 10 (September 29, 2019): 1386–98. http://dx.doi.org/10.1177/1420326x19878217.

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A solar concentrating system incorporated to the south-facing wall could be a promising solution to alleviate the energy demand pressure in buildings. However, concentrating systems incorporated in south-facing walls would require wide acceptance range of concentrators with the purpose of static installation. In order to tackle this problem, this article proposes a novel unitary asymmetric concentrator structure for incorporating the concentrating system in the south-facing wall. A general optimization strategy for the annual performance enhancement of the concentrator is reported. Four kinds of concentrators were designed based on the proposed structure. The annual performance enhancement by this optimization strategy was analysed and compared through the ray-tracing simulation and experimental validation for four typical types of solar concentrators, i.e. Mirror Concentrator, Lens-Mirror Concentrator, Dielectric Concentrator and Air-Gap-Lens-Mirror Concentrator. The optical performance of these concentrators was studied and compared. Their application was analysed and validated through the analysis. The findings have illustrated the optical efficiency of the concentrators for concentrating the photovoltaics or photovoltaic-thermal system incorporated to the south-facing wall either by attachment or embedded into a building structure like a window. These concentrators can be engineered as the main component as a part of the design for a building.
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Ferrara, Maria Antonietta, Valerio Striano, and Giuseppe Coppola. "Volume Holographic Optical Elements as Solar Concentrators: An Overview." Applied Sciences 9, no. 1 (January 7, 2019): 193. http://dx.doi.org/10.3390/app9010193.

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Generally, to reduce the area of a photovoltaic cell, which is typically very expensive, solar concentrators based on a set of mirrors or mechanical structures are used. However, such solar concentrators have some drawbacks, as they need a tracking system to track the sun’s position and also they suffer for the overheat due to the concentration of both light and heat on the solar cell. The fundamental advantages of volume holographic optical elements are very appealing for lightweight and cheap solar concentrators applications and can become a valuable asset that can be integrated into solar panels. In this paper, a review of volume holographic-based solar concentrators recorded on different holographic materials is presented. The physical principles and main advantages and disadvantages, such as their cool light concentration, selective wavelength concentrations and the possibility to implement passive solar tracking, are discussed. Different configurations and strategies are illustrated and the state-of-the-art is presented including commercially available systems.
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Durán, J. C., and R. O. Nicolás. "Comparative optical analysis of cylindrical solar concentrators." Applied Optics 26, no. 3 (February 1, 1987): 578. http://dx.doi.org/10.1364/ao.26.000578.

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PANCOTTI, L. "Optical simulation model for flat mirror concentrators." Solar Energy Materials and Solar Cells 91, no. 7 (April 16, 2007): 551–59. http://dx.doi.org/10.1016/j.solmat.2006.11.007.

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Zitelli, M. "Nonimaging optical concentrators using graded-index dielectric." Applied Optics 53, no. 10 (March 31, 2014): 2256. http://dx.doi.org/10.1364/ao.53.002256.

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Dissertations / Theses on the topic "Optical concentrators"

1

Pancotti, Lorenzo <1977&gt. "Optical concentrators for photovoltaic use." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/349/.

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Green, Adam. "Optical properties of luminescent solar concentrators." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/8361/.

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This thesis on luminescent solar concentrators (LSC) presents work carried out as part of the Electronic and Photonic Molecular Materials (EPMM) group of the department of physics and astronomy at the University of Sheffield. The work is presented in five experimental chapters looking at a range of research aspects from film deposition and measurement instrumentation, to exploring LSC optical properties and device performances by spectral based analytical methods. A Gauge R & R (GRR) study design is used to assess sources of variance in an absolute fluorescence quantum yield measurement system involving an integration sphere. The GRR statistics yield the total variance split into three proportions; equipment, day-to-day and manufacturing variances. The manufacturing variance, describing sample fabrication, was found to exhibit the smallest contribution to measurement uncertainty. The greatest source of variance was found to be from fluctuations in the laser intensity whose uncertainty is carried into the quantum yield determination due to not knowing the exact laser intensity at the time of measurement. The solvation phenomenon is explored as a potential way to improve LSC device yields; this occurs due to excitation induced changes to a fluorophore's dipole moment which leads to a response by the surrounding host medium resulting in shifts in fluorophore emission energy. This effect is shown to improve self-absorption efficiency by reducing the overlap of absorption and emission for particular organic fluorophores. This is expected to greatly improve energy yields but current dopant materials are too costly to employ according to the cost evaluations of this thesis. A spray coating deposition tool is considered for the deposition of thin film coatings for bi-layer LSC devices. A screening study design of experiment is constructed to ascertain the level of control and assess the tool's ability to meet thin film requirements. Despite poor control over the roughness of the thin film layer this property was found to lie close to the acceptable roughness limit in most samples. The biggest issue remains the film thickness achieved by the deposition, which was an order of magnitude too small according to Beer-Lambert absorption models. This spray-coating tool is thus unsuitable for the requirements of a bi-layer LSC. Concentration quenching is explored in the context of LSC device efficiency. Different fluorophores are seen to exhibited varied quenching decay strengths by looking at quantum yield versus fluorophore concentration. For two fluorophores, 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM) and 2,3,6,7-Tetrahydro-9-methyl-1H,5H-quinolizino(9,1-gh)coumarin (C102), the quenching process is explored further using quantum yield and lifetime measurements to extract the quenching rate from rate equations. The form of the quenching rate as a function of molecular separation is shown to be of a monomial power law but distinct from the point-like dipole-dipole coupling of Förster resonant energy transfer (FRET). Additional quenching modes including surface-point and surface-surface interactions are considered to explain the power law form. Spectral analytical models have been constructed to model performance metrics for square-planar LSC devices. In this model the input solar irradiance is considered to be incident normal to the LSC collection face. Device thickness optimisation is explored to ensure maximisation of the absorption efficiency by the fluorophore using Beer-Lambert absorption modelling. The normalised fluorophore emission spectrum is converted to an equivalent irradiant intensity spectrum based on the amount of energy absorbed. Propagation of this energy through the LSC structure is considered in terms of the mean path length of light rays waveguided by total internal reflection and again Beer-Lambert absorption modelling. Self-absorption and host transport losses are included in some detail. Out-coupling of LSC irradiance at the harvesting edges to connected solar cells is then modelled, using c:Si and GaAs power conversion efficiency spectra, and the resultant power output performance can therefore be estimated. Comparison with real devices from literature show that the model works reasonably well compared to these single device configurations and is somewhat conservative in its estimates. Cost efficiency models based on reasonable assumptions conclude the scope of this work showing that current materials fall short of delivering competitive energy solutions by at least factor of 2 in the case of the best dye modelled here.
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Buie, Damien Charles William. "Optical considerations in solar concentrating systems." University of Sydney. Physics, 2004. http://hdl.handle.net/2123/587.

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To optimise the performance of concentrating solar power systems, a detailed knowledge of the resultant flux distribution in the imaging plane is required. To achieve this, an accurate model of the direct solar beam impinging on the concentrator is essential. This thesis presents an empirical model of the terrestrial solar distribution that has both a high-correlation to observed data and an invariance to a change in location. The model is based on the amount of circumsolar radiation in the direct beam and takes into account the small variations that are due to atmospheric scattering. A modelling framework is developed to simulate the flux distribution in the imaging plane of a generic solar concentrating system. Algorithms are developed to include the following: the spatial solar energy distribution; the systemic effect of reflecting that distribution off a non-ideal mirrored surface; the spectral energy distribution; the transmission, absorption and reflection characteristics of optical thin films; and the coordinates of the solar vector. The framework is then used to investigate the performance of anti-reflection coatings on silicon substrates and the performance of linear Fresnel systems. Combined, these algorithms and simulation tools can be applied to create comprehensive optical models of solar concentrating systems.
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Giannuzzi, Alessandra <1980&gt. "Enhancing the efficiency of solar concentrators by controlled optical aberrations." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6224/.

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The diameters of traditional dish concentrators can reach several tens of meters, the construction of monolithic mirrors being difficult at these scales: cheap flat reflecting facets mounted on a common frame generally reproduce a paraboloidal surface. When a standard imaging mirror is coupled with a PV dense array, problems arise since the solar image focused is intrinsically circular. Moreover, the corresponding irradiance distribution is bell-shaped in contrast with the requirement of having all the cells under the same illumination. Mismatch losses occur when interconnected cells experience different conditions, in particular in series connections. In this PhD Thesis, we aim at solving these issues by a multidisciplinary approach, exploiting optical concepts and applications developed specifically for astronomical use, where the improvement of the image quality is a very important issue. The strategy we propose is to boost the spot uniformity acting uniquely on the primary reflector and avoiding the big mirrors segmentation into numerous smaller elements that need to be accurately mounted and aligned. In the proposed method, the shape of the mirrors is analytically described by the Zernike polynomials and its optimization is numerically obtained to give a non-imaging optics able to produce a quasi-square spot, spatially uniform and with prescribed concentration level. The freeform primary optics leads to a substantial gain in efficiency without secondary optics. Simple electrical schemes for the receiver are also required. The concept has been investigated theoretically modeling an example of CPV dense array application, including the development of non-optical aspects as the design of the detector and of the supporting mechanics. For the method proposed and the specific CPV system described, a patent application has been filed in Italy with the number TO2014A000016. The patent has been developed thanks to the collaboration between the University of Bologna and INAF (National Institute for Astrophysics).
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Schultz, Ross Dane. "On the characterisation of diffused light and optical elements in high concentrator photovoltaic modules." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/5170.

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High Concentrated Photovoltaics (H-CPV) promise a more efficient, higher power output than traditional photovoltaic modules. This is achieved by concentrating sunlight onto a small triple junction (CTJ) InGaP/InGaAs/Ge cell (ranging from 3.14 mm2 to 1 cm2) by using precision optical systems. These systems utilise non-imaging optics to concentrate and distribute the incident solar flux uniformly onto the CTJ device receiver to achieve maximum performance and power output from an H-CPV module. However, the performance of the device can be reduced due to the partial or complete absorption of a range of wavelengths present in the solar spectrum by the optical materials that are used for concentration. An investigation to determine the current density topographies of each subcell in a CTJ cell by multiple raster scans of an optical fibre receiver of a spectrometer in the plane of the aperture of the secondary’s optical element was conducted. Results showed that the physical properties of the optical elements’ material absorbed different amounts of the spectral content with respect to the subcell photosensitive wavelength regions. The facet properties of the primary optical Fresnel lens showed that the more rounded the Fresnel facets were, the lower the concentration of sunlight incident onto the CTJ cell. The increase in facet numbers showed an increase in scattering of the incident sunlight and chromatic aberrations. Chromatic aberration created by the refractive optics showed a variation in the amount of concentration on each individual subcell as well as the difference in intensity profiles across for the different subcells. Based on these results and the development of new multi-junction devices by industry, the performance of a four and six-junction device with the optical materials was investigated by simulations. The simulations showed that the careful integration of an additional subcell in a multi-junction device could rectify current mismatch between the subcells in the device. Based on the simulations, the best performing multi-junction cell was identified as the four-junction device that showed a cell and module efficiency under operation of 42.5 % and 35.5 %, respectively. Additionally, based on the performance results observed from the H-CPV module, the development of an HCPV module that would attempt to harness the incident tracked diffuse sunlight available to a concentrator photovoltaic (CPV) module for additional energy yield was undertaken. The part of the study comprised of measurements of the solar source, design of a prototype Hybrid High Concentrator Photovoltaic (HH-CPV) module. Results showed that power generation from the H-CPV system was highly dependent on the DNI levels and fluctuates greatly with variation in the DNI. The irradiance levels within the diffuse regions of the H-CPV module showed that the baseplate and vertical sides had an average irradiance range of 140-450 and 50-225 W.m-2, respectively. Irradiance topographic raster scans revealed that the baseplate and vertical sides had a relatively uniform intensity distribution and was identified as favourable sites for diffuse cell population. Simulations of various PV technologies showed the most suitable technology for the placement within the cavity of the HH-CPV module. The developed HH-CPV module was finalized with the utilization of CIS modules to harness the diffuse irradiance. During a 3 month power monitoring of the HH-CPV system, it was determined that the major power generation for the HH-CPV module come from the CPV component, while the CIS modules showed a minor power contribution. The total energy yield for the monitoring period was 45.99, 3.89 and 1.76 kW.h for the CPV, four-vertical sides and baseplate components, respectively. The increase in energy yield of the HH-CPV module when compared to the standard H-CPV module was determined to be 12.35 % for the monitoring period. The incorporation of the CIS modules into the H-CPV module to create the HH-CPV module did increase the energy yield of the module during high DNI conditions and did offset the almost zero power generation during low DNI conditions.
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Mulder, Carlijn Lucinde. "Engineering the optical properties of luminescent solar concentrators at the molecular scale." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/71482.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 121-128).
Luminescent Solar Concentrators (LSCs) concentrate solar radiation onto photovoltaic (PV) cells using an inexpensive collector plate to absorb incoming photons and waveguide fluorescently re-emitted photons to PVs at the edge. This thesis addresses the two main energy loss mechanisms in LSCs, namely transport losses and trapping losses. We used phycobilisomes, a biological light-harvesting complex, as dyes in the LSC collector to circumvent transport losses caused by photon re-absorption. The selfassembled structure of phycobilisomes couples numerous donor chromophores to a handful of acceptor chromophores through an internal F6rster energy pathway that isolates the absorption and emission spectra. We established that energy transfer within intact phycobilisomes reduces LSC self-absorption losses by approximately (48±5)% by comparing intact and partly decoupled phycobilisome complexes. To reduce trapping losses in LSCs, we leveraged the anisotropic emission pattern of dichroic dye molecules. We aligned their dipole moments normal to the face of the waveguide by embedding them in a liquid crystal host. Vertical dye alignment increased the fraction of the power emitted below the critical angle of the waveguide, thereby raising the trapping efficiency to 81% from 66% for LSCs with unaligned dyes. The enhanced trapping efficiency was preserved for geometric gains up to 30, and an external diffuser can enhance absorption in LSCs with vertically-aligned dyes. This thesis also explores an energy harvesting strategy for portable electronics based on LSCs with dye molecules that are aligned in-plane. The purely absorptive polarizers used to enhance contrast ratios in displays can be replaced with two linearly polarized luminescent concentrators (LSCs) that channel the energy of absorbed photons to PVs at the edge of the display. We coupled up to 40% of incoming photons to the edge of a prototype LSC that also achieved a polarization selection ratio of 3. Finaly, we investigated the contribution of self-absorption and optical waveguiding to triplet exciton transport in crystalline tetracene (Tc) and rubrene (Rb). A timeresolved imaging technique that maps the triplet distribution showed that optical waveguiding dominates over diffusion and can transport energy several micrometers at the high excitation rates commonly used to probe the exciton diffusion constants in organic materials.
by Carlijn Lucinde Mulder.
Ph.D.
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7

Wilson, Lindsay Robert. "Luminescent solar concentrators : a study of optical properties, re-absorption and device optimisation." Thesis, Heriot-Watt University, 2010. http://hdl.handle.net/10399/2336.

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This thesis presents the results of work on the optical properties and design optimisation of the luminescent solar concentrator (LSC). The optical properties of a range of uorophores were measured and it was found that the Lumogen F Rot 305 organic dye exhibited properties which make it ideal for use in LSCs, namely a wide absorption range (300-650 nm), 100% quantum yield at concentrations up to 1700 ppm, and the highest photostability of all the Lumogen F dyes, although the overlap of the absorption and emission spectra results in reabsorption (RA) losses. Despite these optimum properties, a detailed analysis showed that LSCs based on Rot 305 cannot compete with conventional glass/glass laminate modules on grounds of either cost or embodied energy. Since Rot 305 represents an optimum dye, this suggests it is unlikely that LSCs based on organic dyes will ever be competitive with conventional technologies. The only solution is the use of a uorophore with greatly reduced RA losses, for example a rare-earth (RE) complex. The RA losses of a europium-containing complex were found to be less than those of the Rot 305 dye, despite the lower quantum yield of the complex (86 %). The solar-to-electric conversion e ciencies of several LSC modules based on Rot 305 were measured. Modules with dimensions of 10 cm x 10 cm and 60 cm x 60 cm had e ciencies of 2.7% and 1.84% respectively, both measured without a back re ector. In addition, the technique of current-matching the edge cells was successfully demonstrated, resulting in a 15% increase in power output from an edge using matched cells relative to an edge using unmatched cells.
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Weatherby, Clive K. "Reducing the cost of photovoltaic energy conversion : the development of low-cost optical concentrators." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288026.

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Reusswig, Philip David. "Sensitized energy transfer for organic solar cells, optical solar concentrators, and solar pumped lasers." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/93831.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2014.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 123-130).
The separation of chromophore absorption and excitonic processes, such as singlet exciton fission and photoluminescence, offers several advantages to the design of organic solar cells and luminescent solar concentrators (LSCs) for the end goal of achieving a lower cost solar energy generation. This thesis explores three new device architectures to overcome limited solar absorption in singlet-exciton-fission based solar cells and neodymium based LSCs. The process of singlet exciton fission is de-coupled from photon absorption, exciton diffusion, and charge transport in singlet-exciton-fission based solar cells by inserting a singlet fission material at the donor-acceptor interface of an organic solar cell. Singlet excitons generated in the singlet exciton donor are transferred to the singlet fission material through near field energy transfer. In this device structure, the singlet donor can be chosen for high photon absorption, exciton diffusion, and charge transport, and the singlet fission sensitizer can be selected for high singlet fission efficiency. We demonstrated a doubling of the external quantum efficiency from 12.8% to 27.6% in a singlet donor (TPTPA) through the introduction of thin film singlet fission sensitizer (rubrene) for high efficiency organic solar cells. To reduce the cost of electricity generated by sunlight via LSC systems, replacing the expensive high efficiency visible photovoltaic (PV) elements with cheap, high efficiency, earth abundant near-infrared PV elements made with silicon. This requires replacing within the LSC the visible emitting chromophores with near infrared emitters. Here, we present the use of a lanthanide ion, neodymium--colloidal nanocrystal energy cascade system as a promising LSC emitter scheme for the silicon spectral region. Peak optical quantum efficiencies of 43% in a Nd³+:glass based LSC are demonstrated with simulated high geometric gain performance. With cascade energy transfer, the optical quantum efficiency in the visible of a Nd³+:glass is significantly improved with peak efficiency of 28%. The enhanced solar absorption of Nd³+:glass through cascade energy transfer can be extended into the infrared with more optimal sensitizers. The idea of directly converting broad-band solar radiation into coherent and narrow-band laser radiation could enable many attractive technologies for solar energy. Here, we present an architecture for solar pumped lasers that uses a luminescent solar concentrator to decouple the conventional trade-off between solar absorption efficiency and the mode volume of the optical gain material. We report a 750-[mu]m-thick Nd³+-doped YAG planar waveguide sensitized by a luminescent CdSe/CdZnS (core/shell) colloidal nanocrystal, yielding a peak cascade energy transfer of 14%, a broad spectral response in the visible portion of the solar spectrum, and an equivalent quasi-CW solar lasing threshold of 20 W-cm2 , or approximately 200 suns. The efficient coupling of incoherent, spectrally broad sunlight in small gain volumes should allow the generation of coherent laser light from intensities of less than 100 suns.
by Philip David Reusswig.
Ph. D.
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Correia, Sandra Filipa Henriques. "Organic-inorganic hybrid materials for green photonics: luminescent solar concentrators." Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/17407.

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Doutoramento em Física
Luminescent solar concentrators are inexpensive devices that aim to increase the efficiency of photovoltaic cells and promote the urban integration of photovoltaic devices, with unprecedented possibilities of energy harvesting through the façade of buildings, urban furniture or wearable fabrics. Generally, they consist of a transparent matrix coated or doped with active optical centres that absorb the incident solar radiation, which is re-emitted at a specific wavelength and transferred by total internal reflection to the edges where the photovoltaic cells are located. The main objective of this work is the production of luminescent solar concentrators whose optically active layer is based on organic-inorganic hybrid materials doped with europium ions or organic dyes, in particular, Rhodamine 6G and Rhodamine 800. Rhodamine 800, as opposed to europium ions and Rhodamine 6G which emit in the visible range, emits in the near infrared (NIR) range, which is an advantage for crystalline Si-based photovoltaic cells, whose efficiency is greater in the NIR. In this work, although the luminescent solar concentrators with planar geometry are addressed, the main focus is the use cylindrical geometry. The use of this type of geometry allows the effect of concentration to be higher relative to the planar geometry, since the ratio between the exposed area and the area of the edges is increased. The cylindrical geometry is exploited by producing luminescent solar concentrators based on polymer optical fibre (plastic) where the optically active layer is on the outside (as a coating) or inside (as a filling in the hollow core) of the optical fibre. Furthermore, the possibility of increasing the exposed area was also dealt with the production of bundles of luminescent solar concentrators in which the plastic optical fibres are placed side by side and, also, by fabricating luminescent solar concentrators with length in the metre scale.
Os concentradores solares luminescentes são dispositivos de baixo custo que têm como objetivo aumentar a eficiência de células fotovoltaicas e promover a integração de dispositivos fotovoltaicos em elementos do dia-a-dia, tornando possível a captura de energia solar, através da fachada de edifícios, mobiliário urbano ou em têxteis. Geralmente, consistem numa matriz transparente coberta ou dopada com centros óticos ativos, capazes de absorver a radiação solar incidente e reemiti-la com um comprimento de onda específico que será transportada, através de reflexão interna total, para as extremidades da matriz onde se encontra(m) a(s) célula(s) fotovoltaica(s). O principal objetivo deste trabalho consiste na produção de concentradores solares luminescentes cuja camada ótica ativa é baseada em materiais híbridos orgânicos-inorgânicos dopados com iões lantanídeos (európio, Eu3+) ou corantes orgânicos, nomeadamente, Rodamina 6G e Rodamina 800. A Rodamina 800, ao contrário dos iões de európio e da Rodamina 6G que emitem na gama do visível, emite na região espetral do infravermelho próximo (NIR), que se revela uma vantagem quando a célula fotovoltaica em uso é composta de silício cristalino, cuja gama de maior eficiência é no NIR. Neste trabalho, apesar de serem abordados concentradores solares luminescentes com geometria planar, o principal foco é a utilização da geometria cilíndrica. Este tipo de geometria permite que o efeito de concentração seja superior, relativamente à geometria planar, uma vez que a razão entre a área exposta e a área das extremidades é aumentada. A geometria cilíndrica é explorada, através da produção de concentradores solares luminescentes com base em fibra ótica polimérica (plástica) em que a camada ótica ativa se encontra no exterior (como um revestimento) ou no interior (como um preenchimento do núcleo oco). Além disso, a possibilidade de aumentar a área exposta foi, também, abordada com o fabrico de uma matriz de concentradores solares luminescentes colocados lado a lado e, também, com o fabrico de concentradores solares luminescentes na escala do metro.
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Books on the topic "Optical concentrators"

1

Williams, Michael D. Influence of refractive index and solar concentration on optical power absorption in slabs. Hampton, Va: Langley Research Center, 1988.

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Piszczor, Michael F. A high-efficiency refractive secondary solar concentrator for high temperature solar thermal applications. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2000.

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Zacharopoulos, Aggelos. Optical design modelling and experimental characterisation of line-axis concentrators for solar photovoltaic and thermal applications. [s.l: The Author], 2001.

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O'Neill, M. J. Conceptual design study of a 5 kilowatt solar dynamic Brayton power system using a dome Fresnel lens solar concentrator. [Cleveland, OH: National Aeronautics and Space Administration, 1990.

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Optical evaluation of a refractive secondary concentrator. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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Suzuki, Akio, and Ralf Leutz. Nonimaging Fresnel Lenses: Design and Performance of Solar Concentrators (Springer Series in Optical Sciences). Springer, 2001.

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A high-efficiency refractive secondary solar concentrator for high temperature solar thermal applications. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2000.

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P, Macosko Robert, and NASA Glenn Research Center, eds. A high-efficiency refractive secondary solar concentrator for high temperature solar thermal applications. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2000.

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A high-efficiency refractive secondary solar concentrator for high temperature solar thermal applications. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2000.

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P, Macosko Robert, and NASA Glenn Research Center, eds. Refractive secondary concentrators for solar thermal applications. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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Book chapters on the topic "Optical concentrators"

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Leutz, Ralf, and Akio Suzuki. "Optimization of Stationary Concentrators." In Springer Series in OPTICAL SCIENCES, 127–53. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-540-45290-4_8.

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Goetzberger, Adolf. "Fluorescent Solar Energy Concentrators: Principle and Present State of Development." In Springer Series in Optical Sciences, 277–95. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22864-4_12.

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Wu, Yupeng, Mervyn Smyth, Philip Eames, and Tapas Mallick. "Optical and Thermal Analysis of Different Asymmetric Compound Parabolic Photovoltaic Concentrators (ACPPVC) Systems for Building Integration." In Proceedings of ISES World Congress 2007 (Vol. I – Vol. V), 1440–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75997-3_292.

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Weik, Martin H. "optical fiber concentrator." In Computer Science and Communications Dictionary, 1167. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_12995.

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Shanks, Katie, Sundaram Senthilarasu, and Tapas K. Mallick. "High-Concentration Optics for Photovoltaic Applications." In High Concentrator Photovoltaics, 85–113. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15039-0_4.

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Mohedano, Rubén, and Ralf Leutz. "CPV Optics." In Handbook of Concentrator Photovoltaic Technology, 187–238. Chichester, West Sussex: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781118755655.ch04.

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Vant-Hull, L. L. "Concentrator Optics." In Solar Power Plants, 84–133. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-61245-9_3.

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Leutz, Ralf, and Akio Suzuki. "Solar Thermal Concentrator Systems." In Springer Series in OPTICAL SCIENCES, 217–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-540-45290-4_11.

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Hernández, Maikel. "Characterization of Optics for Concentrator Photovoltaics." In Handbook of Concentrator Photovoltaic Technology, 615–38. Chichester, West Sussex: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781118755655.ch11.

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Weik, Martin H. "fiber optic concentrator." In Computer Science and Communications Dictionary, 586. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_6932.

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Conference papers on the topic "Optical concentrators"

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Narasimhan, B., P. Benitez, Juan C. Miñano, Julio Chaves, D. Grabovickic, Milena Nikolic, and J. Infante. "Freeform aplanatic concentrators." In SPIE Optical Engineering + Applications, edited by Roland Winston and Jeffrey M. Gordon. SPIE, 2015. http://dx.doi.org/10.1117/12.2189092.

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Winston, Roland. "Thermodynamically efficient solar concentrators." In SPIE Optical Engineering + Applications, edited by Roland Winston and Jeffrey M. Gordon. SPIE, 2011. http://dx.doi.org/10.1117/12.899364.

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Winston, Roland. "Thermodynamically efficient solar concentrators." In SPIE Optical Engineering + Applications, edited by Roland Winston and Jeffrey M. Gordon. SPIE, 2012. http://dx.doi.org/10.1117/12.931727.

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Unger, Blair L., Greg R. Schmidt, and Duncan T. Moore. "Dimpled Planar Lightguide Solar Concentrators." In International Optical Design Conference. Washington, D.C.: OSA, 2010. http://dx.doi.org/10.1364/iodc.2010.itue5p.

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Shatz, Narkis, John Bortz, and Roland Winston. "Thermodynamic efficiency of nonimaging concentrators." In SPIE Optical Engineering + Applications, edited by Roland Winston and Jeffrey M. Gordon. SPIE, 2009. http://dx.doi.org/10.1117/12.824195.

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Francini, F., D. Fontani, D. Jafrancesco, L. Mercatelli, and P. Sansoni. "Optical control of sunlight concentrators." In SPIE Optics + Photonics, edited by Martha Symko-Davies. SPIE, 2006. http://dx.doi.org/10.1117/12.678249.

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Ferry, Vivian E. "Nanophotonic Luminescent Solar Concentrators." In Optical Nanostructures and Advanced Materials for Photovoltaics. Washington, D.C.: OSA, 2015. http://dx.doi.org/10.1364/pv.2015.pw3b.1.

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Wang, Chunhua, Roland Winston, Weiya Zhang, Dave Pelka, and Sue Carter. "Optical enhancement for luminescent solar concentrators." In SPIE Optical Engineering + Applications, edited by Roland Winston and Jeffrey M. Gordon. SPIE, 2010. http://dx.doi.org/10.1117/12.863250.

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Benitez, Pablo, Ruben Mohedano Arroyo, and Juan C. Minano. "Manufacturing tolerances for nonimaging concentrators." In Optical Science, Engineering and Instrumentation '97, edited by Roland Winston. SPIE, 1997. http://dx.doi.org/10.1117/12.290214.

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Ries, Harald, and Jeffrey M. Gordon. "Double-tailored imaging concentrators." In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, edited by Roland Winston. SPIE, 1999. http://dx.doi.org/10.1117/12.368245.

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Reports on the topic "Optical concentrators"

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Romero, V. CIRCE2/DEKGEN2: A software package for facilitated optical analysis of 3-D distributed solar energy concentrators. Theory and user manual. Office of Scientific and Technical Information (OSTI), March 1994. http://dx.doi.org/10.2172/10142374.

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Katardjiev, Ilia. Optical Characterisation of a Fractal Solar Concentrator. Uppsala University, January 2021. http://dx.doi.org/10.33063/diva-430393.

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Katardjiev, Ilia. Optical Characterisation of a Fractal Solar Concentrator. Uppsala University, January 2021. http://dx.doi.org/10.33063/diva-430393.

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Mourant, J. R., I. J. Bigio, D. A. Jack, T. M. Johnson, and H. D. Miller. Optical measurement of drug concentrations in tissue. Office of Scientific and Technical Information (OSTI), October 1997. http://dx.doi.org/10.2172/532514.

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Robert Lucht. Development of New Optical Sensors for Measurements of Mercury Concentrations, Speciation, and Chemistry. Office of Scientific and Technical Information (OSTI), September 2008. http://dx.doi.org/10.2172/966353.

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Baker, Kevin. MEMS Refocusing Secondary Concentrator for Free Space Optics, CRADA No. TC02073.0. Office of Scientific and Technical Information (OSTI), July 2013. http://dx.doi.org/10.2172/1115599.

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Baker, K., and M. Cohn. MEMS Refocusing Secondary Concentrator for Free Space Optics, CRADA No. TC02073.0. Office of Scientific and Technical Information (OSTI), March 2021. http://dx.doi.org/10.2172/1773590.

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Lewis, Jennifer, Ralph Nuzzo, and John Rogers. Transfer Printed Microcells with Micro-Optic Concentrators for Low Cost, High Performance Photovoltaic Modules. Office of Scientific and Technical Information (OSTI), April 2011. http://dx.doi.org/10.2172/1060277.

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Lei, Junting, Zhihau Cai, and Charles R. Martin. Effect of Reagent Concentrations Used to Synthesize Polypyrrole on the Chemical Characteristics and Optical and Electronic Properties of the Resulting Polymer. Fort Belvoir, VA: Defense Technical Information Center, July 1991. http://dx.doi.org/10.21236/ada238900.

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Jerald A. Caton and Kalyan Annamalai. Development of All-Solid-State Sensors for Measurement of Nitric Oxide and Ammonia Concentrations by Optical Absorption in Particle-Laden Combusion Exhaust Streams. Office of Scientific and Technical Information (OSTI), September 2003. http://dx.doi.org/10.2172/902507.

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