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Journal articles on the topic 'Organic Light-Emitting Devices (OLEDs)'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Zhou, Yubu, Huayu Gao, Jing Wang, et al. "Organic Light-Emitting Diodes with Ultrathin Emitting Nanolayers." Electronics 12, no. 14 (2023): 3164. http://dx.doi.org/10.3390/electronics12143164.

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Organic light-emitting diodes (OLEDs) are promising for displays and lighting technologies because of their excellent advantages, such as high efficiency, high luminance, low power consumption, light weight, and flexibility. In recent years, ultrathin emitting nanolayers (UENs) have been used to develop OLEDs without the doping technique, which can simplify device structure, reduce material loss, achieve good exciton utilization, and realize comparable performance to doped devices such as the external quantum efficiency of 28.16%, current efficiency of 63.84 cd/A, and power efficiency of 76.70

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2

Odedara, Nisha, Niteen Borane, Rahul Patel, and Rajamouli Boddula. "A Review on the Milestones of Blue Light-Emitting Materials in India." Organic Materials 5, no. 01 (2023): 1–20. http://dx.doi.org/10.1055/s-0042-1757980.

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Since 1987 in the field of optoelectronics, organic light-emitting diodes (OLEDs) have secured their position because of their extreme use in panels of lighting applications such as TV and smartphone displays. At present, OLEDs are at top-notch position in the lighting market for their promising features. The field of OLEDs is rapidly growing day by day in academia and industry due to the success of OLEDs in the form of excellent efficiency, feasible methods, excellent lifetime, color purity, and superb device architecture. As a result, OLEDs are new profitable leading devices of the 21st cent

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3

So, Franky, Junji Kido, and Paul Burrows. "Organic Light-Emitting Devices for Solid-State Lighting." MRS Bulletin 33, no. 7 (2008): 663–69. http://dx.doi.org/10.1557/mrs2008.137.

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AbstractOrganic light-emitting devices (OLEDs) have been widely developed for flat-panel displays, but only recently the efficiency of white OLEDs has risen to the point where they can be considered for solid-state lighting (SSL) applications. In this review, we discuss the requirements of solid-state lighting as they relate to OLEDs. We focus on how the color, efficiency, and cost requirements of general illumination differ from those of displays and how these differences might have an impact on the design of organic SSL. We then present some recent developments in large-area fabrication tech

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Ivaniuk, Khrystyna, Stepan Kutsiy, Mykhailo Shchetinin, Tetiana Bulavinets, and Iryna Yaremchuk. "Application of carbazole derivatives as a multifunctional material for organic light-emitting devices." Chemical engineering 2, no. 3(76) (2024): 31–36. http://dx.doi.org/10.15587/2706-5448.2024.302968.

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The object of research is newly synthesized carbazole-derived compounds and organic light-emitting structures based on them. The problem lies in the complex solution of scientific and technical problems of improving the characteristics and stability of organic light-emitting diodes (OLEDs), namely improving the brightness and energy-efficient parameters. Organic light-emitting structures of blue, blue, and green radiation with color coordinates were formed by the thermovacuum sputtering method and the solution deposition method. The turn-on voltage of the white OLED is 6 V, the maximum brightn

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5

Huang, Cuiying, Yiwei Zhang, and Xinping Zhang. "End-emitting nano organic light emitting diodes (OLEDs) with directional output." Nanophotonics 9, no. 9 (2020): 2905–13. http://dx.doi.org/10.1515/nanoph-2020-0145.

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AbstractWe report a new strategy for the design of organic light emitting diodes (OLEDs), where nanoscale OLEDs are fabricated into a large-area periodic array with their emission propagating along the active layer and being coupled out through the end facets. A large-area template dielectric grating is produced by interference lithography. The OLED devices are then produced on the side walls of the template grating lines, where each device is carried by the back of a grating line and has a width of <300 nm and a height of about 270 nm. The emission is coupled out of the device on the end f

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SUN, DALI, TEK P. BASEL, BHOJ R. GAUTAM, et al. "GIANT MAGNETO-ELECTROLUMINESCENCE FROM HYBRID SPIN-ORGANIC LIGHT EMITTING DIODES." SPIN 04, no. 01 (2014): 1450002. http://dx.doi.org/10.1142/s2010324714500027.

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An important application that may boost the use of magnetic-field controlled organic devices is significant magnetically modulated electroluminescence (MEL) at room temperature (RT). Whereas inorganic magnetic tunnel junctions show RT magneto-resistance (MR)> 80%, these devices do not exhibit electroluminescence. In contrast, organic light-emitting diodes (OLED) show substantive electroluminescence. Alas, at RT both organic spin valves and spin-OLEDs have shown rather small MR and MEL. We report here a hybrid organic/inorganic magnetic-field controlled device (h-OLED) which comprises of an

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Ning, Weimin, Guoqi Xia, Kailong Wu, et al. "P‐15.31: Extremely High‐efficiency OLEDs by Phosphorescent Sensitized Devices." SID Symposium Digest of Technical Papers 55, S1 (2024): 1525–27. http://dx.doi.org/10.1002/sdtp.17415.

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In this paper, a method for further improving the efficiency of top emission organic light‐emitting diodes (TE‐OLEDs) by phosphorescent sensitized fluorescent organic light‐emitting diodes (PSF‐OLEDs) was provided. The maximum current efficiency (CE) of PSF‐OLEDs realized an improvement of nearly 40% compared with the phosphorescent device, which exhibited great potential in high‐efficiency OLEDs.

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8

Kim, J. Y., S. Cheon, H. Lee, et al. "Smart approach to liquid electrolyte-based multi-colored electrochemiluminescence for lighting applications." Journal of Materials Chemistry C 5, no. 17 (2017): 4214–18. http://dx.doi.org/10.1039/c7tc01031a.

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As potential lighting-emitting devices, electrochemiluminescence (ECL) devices are promising in terms of device structure and fabrication and involve low processing cost compared to organic light-emitting devices (OLEDs).

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9

Momodu, D. Y., T. Tong, M. G. Zebaze Kana, and W. O. Soboyejo. "Adhesion and Degradation of Organic and Hybrid Organic-Inorganic Light-Emitting Devices." Advanced Materials Research 1132 (December 2015): 185–203. http://dx.doi.org/10.4028/www.scientific.net/amr.1132.185.

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This paper presents the results of a combined analytical, computational and experimental study of adhesion and degradation of Organic Light Emitting Devices (OLEDs). The adhesion between layers that are relevant to OLEDs is studied using force microscopy during Atomic Force Microscopy. The interfacial failure mechanisms associated with blister formation in OLEDs and the addition of TiO2nanoparticles (into active regions) are then elucidated using a combination of fracture mechanics/finite element modeling and experiments. The blisters observed in the models are shown to be consistent with the

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10

Yadav, Rohit Ashok Kumar, Deepak Kumar Dubey, Sun-Zen Chen, Sujith Sudheendran Swayamprabha, Tzu-Wei Liang, and Jwo-Huei Jou. "Effect of dielectric character of electron transporting materials on the performance of organic light-emitting diodes." MRS Advances 3, no. 59 (2018): 3445–51. http://dx.doi.org/10.1557/adv.2018.365.

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AbstractOrganic light-emitting diodes (OLEDs) have progressively attracted generous attention because of their versatile applications in solid state lighting and full color displays. High-efficiency is crucial for OLED devices being energy saving and to have a longer lifespan. Numerous approaches have been attempted to attain high-efficiency OLEDs via newly synthesized organic materials, light-extraction structure design and energy-efficient device architectures. The organic materials used in optoelectronic devices have inherently low dielectric constant. In this work, we demonstrate a compreh

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11

Zhong, Gao Yu, Pei Yuan Fang, and Yong Ming Cao. "Organic Light-Emitting Diodes with Varying Thickness of Bathocuproine Layer." Materials Science Forum 694 (July 2011): 901–7. http://dx.doi.org/10.4028/www.scientific.net/msf.694.901.

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A series of organic light-emitting diodes (OLEDs) with or without a bathocuproine (BCP) layer inserted in the control device indium-tin-oxide (ITO)\ N,N'-bis-(1-naphthl)-diphenyl-1,1'- biphenyl-4,4'-diamine (NPB)\ tris(8-quinolinolato) aluminum (Alq)\LiF\Al have been fabricated and measured. Different influences of the BCP layer on electroluminescence (EL) of the OLEDs have been investigated. It is found that the highest efficiency of the OLED with a 1-nm BCP layer inserted between NPB and Alq increases to 3.99 cd/A, ~48% higher than that of the control device, while the EL efficiencies of the

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Naqvi, Syed, Mirza Baig, Tanveer Farid, et al. "Unraveling Degradation Processes and Strategies for Enhancing Reliability in Organic Light-Emitting Diodes." Nanomaterials 13, no. 23 (2023): 3020. http://dx.doi.org/10.3390/nano13233020.

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Organic light-emitting diodes (OLEDs) have emerged as a promising technology for various applications owing to their advantages, including low-cost fabrication, flexibility, and compatibility. However, a limited lifetime hinders the practical application of OLEDs in electronic devices. OLEDs are prone to degradation effects during operation, resulting in a decrease in device lifetime and performance. This review article aims to provide an exciting overview of OLED degradation effects, highlighting the various degradation mechanisms. Subsequently, an in-depth exploration of OLEDs degradation me

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13

Cho, Jung Yohn, and Ho Jung Chang. "Preparation and Characterization of Organic Light Emitting Devices Using QD Dopant." Materials Science Forum 449-452 (March 2004): 1021–24. http://dx.doi.org/10.4028/www.scientific.net/msf.449-452.1021.

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Two types of the organic light-emitting devices (OLEDs) with different emission structures were prepared using Alq3 (aluminum tris 8-hydroxyquinoline) host material and quinacridone (QD) dopant at the emission layer. One is the OLED device with emission layer consisting of Alq3 host material doped with QD dopant ("codoped OLED"). The another one has a seperated QD dopant film in the Alq3 emission layer ("undoped OLED"). The maximum brightness of the codoped and undoped OLEDs were 3207 cd/m2 and 1570 cd/m2, respectively. The wavelength of the maximum emission peak in the undoped sample was 527

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14

Wang, Ai. "The Design and Progress of Organic Light-Emitting Diode." Highlights in Science, Engineering and Technology 27 (December 27, 2022): 343–48. http://dx.doi.org/10.54097/hset.v27i.3776.

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Organic light emitting diode (OLED) is one of the main lighting devices and can be used as mobile phone screens, so its performance enhancement is worthy of an in-depth study. This paper discusses three types of devices with different light emitting principles in the history of OLED development in chronological order and their performances, as well as ways to enhance their external quantum efficiency (EQE). For fluorescent, phosphorescent and thermally activated delayed fluorescent (TADF) OLEDs, adding additional layers and doping are effective means of improving the performance. For fluoresce

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15

Islam, Amjad, Syed Hamad Ullah Shah, Zeeshan Haider, et al. "Biological Interfacial Materials for Organic Light-Emitting Diodes." Micromachines 14, no. 6 (2023): 1171. http://dx.doi.org/10.3390/mi14061171.

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Organic optoelectronic devices have received appreciable attention due to their low cost, mechanical flexibility, band-gap engineering, lightness, and solution processability over a broad area. Specifically, realizing sustainability in organic optoelectronics, especially in solar cells and light-emitting devices, is a crucial milestone in the evolution of green electronics. Recently, the utilization of biological materials has appeared as an efficient means to alter the interfacial properties, and hence improve the performance, lifetime and stability of organic light-emitting diodes (OLEDs). B

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POLOȘAN, Silviu. "ORGANIC LIGHT EMITTING DIODES (OLED)." Annals of the Academy of Romanian Scientists Series on Physics and Chemistry 8, no. 1 (2023): 46–57. http://dx.doi.org/10.56082/annalsarsciphyschem.2023.1.46.

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"Organic Light Emitting Diodes (OLED) now reach the third phase concerning efficiency. The first devices are based on pure organic materials, and the second and third generations are based on combinations between metals and organic ligands in so- called organometallics for which their emission external quantum efficiency is increased. The second generation is now widely used in large displays reaching high efficiency because of the spin-orbit coupling between metal and their ligands, which induces intersystem crossing processes. The third generation of OLED comprises an increased external quan

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17

Kagatikar, Sneha, and Dhanya Sunil. "Schiff Bases and Their Complexes in Organic Light Emitting Diode Application." Journal of Electronic Materials 50, no. 12 (2021): 6708–23. http://dx.doi.org/10.1007/s11664-021-09197-9.

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AbstractOptoelectronics is an active area of research and, for few decades, development of different semiconducting materials with a wide emission window has attracted researchers. Organic light emitting diodes (OLEDs) are primarily utilized in displays and light sources that greatly contribute towards the conservation of energy and do not need a backlight for displays. Development in device efficiency, lifetime and stability is now a major concern in this particular application, and designing efficient material for OLEDs has been an active field of research for decades. Metal-organic compound

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18

Liu, Junwei, Huanhuan Zhang, Min Zhang, et al. "P‐14.7: Research on the performance of blue‐green tetra‐Tandem organic light emitting diodes." SID Symposium Digest of Technical Papers 56, S1 (2025): 1702–4. https://doi.org/10.1002/sdtp.19190.

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In this work, we present a blue‐green tandem organic light emitting diodes (BG‐OLEDs) with triplex blue emitting units and single green emitting unit. The analysis results of optical performances such as front efficiency, spectral variation, and viewing angle in different BG‐OLED devices were explained. The blue‐green tandem OLEDs introduced in this work provides a cost‐effective way to extend the applications of QDs for full‐color displays.

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19

Yoo, Dong-Heon, and Cheol-Hee Moon. "Solution-Processed Organic Light-Emitting Diodes Using a Lamination Method." Applied Sciences 14, no. 24 (2024): 11671. https://doi.org/10.3390/app142411671.

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This study aimed to improve the luminous characteristics of laminated OLEDs using the electron injection layer as an adhesive layer by introducing several materials to overcome the limitations of previous studies. We improved the adhesiveness and electron injection ability at the same time by mixing polyethylene glycol (PEG) and D-sorbitol with polyethyleneimine (PEI). In addition, we introduced TPBi and PBD, which are electron-transport and hole-blocking (ET/HB) materials, to improve the electron-transport capability of laminated OLEDs. We fabricated a single-carrier device to analyze the bal

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Tagare, Jairam, Rajamouli Boddula, Sujith Swayamprabha Sudheendran, et al. "Efficient near ultraviolet emissive (CIEy < 0.06) organic light-emitting diodes based on phenanthroimidazole–alkyl spacer–carbazole fluorophores: experimental and theoretical investigation." Journal of Materials Chemistry C 8, no. 47 (2020): 16834–44. http://dx.doi.org/10.1039/d0tc03720f.

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Efficient near ultraviolet light-emitting materials are of particular importance in organic light emitting devices (OLEDs) because of their potential for application in high-quality flat panel displays and white OLEDs.

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21

Zhang, Jiaming, Yuanhe Wang, Shihao Liu, Hongwei Yu, Letian Zhang, and Wenfa Xie. "Color-tunable organic light-emitting diodes with ultrathin thermal activation delayed fluorescence emitting layer." Applied Physics Letters 120, no. 17 (2022): 171102. http://dx.doi.org/10.1063/5.0084137.

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Recently, organic light-emitting diodes (OLEDs) are becoming increasingly attractive to information security, wearable healthcare, and other fields. These fields propose different requirements for performances of OLEDs, especially for voltage-controlled color tunability. In this study, it is proposed to use an ultrathin layer consisting of thermally activated delayed fluorescence (TADF) material as an emitting layer of OLEDs. On the one hand, compared to devices with an ultrathin phosphorescent emitting layer, the OLEDs with TADF show observable color-tunability. On the other hand, the color-t

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22

Chandra, V. K., B. P. Chandra, and Piyush Jha. "Organic Light - Emitting Diodes and their Applications." Defect and Diffusion Forum 357 (July 2014): 29–93. http://dx.doi.org/10.4028/www.scientific.net/ddf.357.29.

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Organic light emitting diodes (OLEDs) have been the focus of intense study since the late 1980s, when the low voltage organic electroluminescence in small organic molecules such as Alq3, and large organic molecules such as polymers (PPV), was reported. Since that time, research has continued to demonstrate the potential of OLEDs as viable systems for displays and eco-friendly lighting applications. OLEDs offer full colour display, reduced manufacturing cost, larger viewing angle, more flexible, lower power consumption, better contrast, slimmer, etc. which help in replacing the other technologi

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23

Ding, Gui Ying, Wen Long Jiang, Guang De Wang, Qiang Han, and Xi Chang. "Improve the Efficiency of White Organic Light-Emitting Devices Using Double-Doped System." Advanced Materials Research 152-153 (October 2010): 687–90. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.687.

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The doped and non-doped white Organic light-emitting devices (OLEDs) were fabricated, using strong yellow emitting and hole-transporting ability of TPAHQZn. When the white OLED is a double-doped structure, greatly enhanced the efficiency of the device. The double-doped white device were fabricated as follows: ITO/2T-NATA (17 nm)/ CBP: 30% TPAHQZn: 8% Ir(ppy)3 (25 nm)/ NPBX (15 nm)/BCP(8nm)/TPBi: 10% Ir(ppy)3 (15nm)/Alq3 (20 nm)/LiF (1.3 nm)/Al. The double-doped white OLEDs were obtained with Commission International de L’Eclairage coordinates of (0.29,0.28) at 17 V, the maximum current efficie

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K., G. MANE P. B. NAGORE DR. S. R. PUJARI. "GREEN LIGHT EMITTING TRICOMPONENT LUMINOPHORS OF 2-NAPHTHOL FOR CONSTRUCTION OF ORGANIC LIGHT EMITTING DEVICES." JournalNX - A Multidisciplinary Peer Reviewed Journal 3, no. 9 (2018): 38–41. https://doi.org/10.5281/zenodo.1143805.

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This article presents a previous study and incredible progress in basic theoretical modeling, and working for organic light-emitting devices (OLEDs) including preparation and characteristic studies of Organo- Luminescent Materials by conventional solid state reaction technique.

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Brückner, R., V. G. Lyssenko, S. Hofmann, and K. Leo. "Lasing of Tamm states in highly efficient organic devices based on small-molecule organic semiconductors." Faraday Discuss. 174 (2014): 183–201. http://dx.doi.org/10.1039/c4fd00094c.

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We discuss approaches to increase the light outcoupling efficiency in organic microcavity (MC) lasers and organic light-emitting diodes (OLEDs). We find that the introduction of metals into the cavities leads to additional Tamm-plasmon polariton modes, while the corrugation of metal contacts, such as perforated μ-size holes or a periodic array of metal stripes, leads to 2D confinement of the cavity modes, which in turn reduces the lasing threshold in MCs. Furthermore, we elucidate light loss mechanisms in OLEDs and reveal how external dielectric layers and periodic gratings can be used to enha

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K., G. MANE, B. NAGORE P., and S. R. PUJARI DR. "GREEN LIGHT EMITTING TRICOMPONENT LUMINOPHORS OF 2-NAPHTHOL FOR CONSTRUCTION OF ORGANIC LIGHT EMITTING DEVICES." JournalNX - a Multidisciplinary Peer Reviewed Journal Volume 3, Issue 9 (2018): 38–41. https://doi.org/10.5281/zenodo.1420610.

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This article presents a previous study and incredible progress in basic theoretical modeling, and working for organic light-emitting devices (OLEDs) including preparation and characteristic studies of Organo-Luminescent Materials by conventional solid state reaction technique. https://journalnx.com/journal-article/20150438

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27

Yadav, Rohit Ashok Kumar, Mangey Ram Nagar, Deepak Kumar Dubey, Sujith Sudheendran Swayamprabha, and Jwo-Huei Jou. "Highly-Efficient Solution-Processed Organic Light Emitting Diodes with Blend V2O5-PEDOT:PSS Hole-Injection/Hole-Transport Layer." MRS Advances 4, no. 31-32 (2019): 1779–86. http://dx.doi.org/10.1557/adv.2019.261.

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ABSTRACTOrganic light-emitting diodes (OLEDs) have attracted huge concern because of their intrinsic characteristics and ability to reach the pinnacle in the field of high-quality flat-panel displays and energy-efficient solid-state lighting. High-efficiency is always a key crux for OLED devices being energy-saving and longer life-span. OLEDs have encountered enormous difficulties in meeting the requirements for large-sized devices due to a major limitation in vacuum thermal evaporation technology. In multilayered OLED devices, the characteristics of the charge injection/transport layer is a c

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28

Zhang, Yibo. "From Structure to Performance - Enhancing the Efficiency and Longevity of OLED Devices." Highlights in Science, Engineering and Technology 121 (December 24, 2024): 237–46. https://doi.org/10.54097/015wv788.

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Organic light-emitting diodes (OLEDs) have emerged as the most advanced and popular display technology, offering exceptional color quality, efficiency, and design flexibility. Despite their widespread adoption in consumer electronics, OLEDs, particularly Blue OLEDs, face significant challenges such as limited lifespan, efficiency constraints, and high production costs. This paper comprehensively illustrates the operational principle, device structures, and evaluation standards of OLED technology and devices. It explains the sandwich and multi-layer structures and the physical process of carrie

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29

B., Madhumitha, and Priyanka T. "OLED (Organic Light Emitting Diode) Technology." Journal of VLSI Design and its Advancement 6, no. 3 (2023): 27–31. https://doi.org/10.5281/zenodo.10258723.

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<i>Organic light-emitting diodes (OLEDs) have been regarded as one of the most promising technologies for future displays since Kodak's breakthrough in 1987. A variety of materials have been created and enhanced to meet the needs of this application. The structure of the materials varies from one another, as does the process that produces the electroluminescence (fluorescence versus phosphorescence). These materials, when stacked correctly, produce a device with the necessary extended lifetime and excellent efficiency. The centre of a display can then be created by combining these red, green,

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30

Lee, Gyeong Won, Yoonsuk Choi, Heejin Kim, Jongwoo Park, Jong-In Shim, and Dong-Soo Shin. "Analysis of Transient Degradation Behaviors of Organic Light-Emitting Diodes under Electrical Stress." Applied Sciences 11, no. 16 (2021): 7627. http://dx.doi.org/10.3390/app11167627.

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Despite the wide application of organic light-emitting diodes (OLEDs), the performance of OLED devices is sometimes limited by their reliabilities. In this paper, we report the transient degradation behaviors of fluorescent blue OLEDs, where both the current and luminance initially increase under electrical stress within a short stress time. We analyze the degradation mechanism in terms of the carrier recombination and transport. From the comprehensive analyses of electrical and optical characteristics, it is suggested that the electron transport is responsible for the initial transient behavi

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31

Nuyken, Oskar, Steffen Jungermann, Valerie Wiederhirn, Erwin Bacher, and Klaus Meerholz. "Modern Trends in Organic Light-Emitting Devices (OLEDs)." Monatshefte für Chemie - Chemical Monthly 137, no. 7 (2006): 811–24. http://dx.doi.org/10.1007/s00706-006-0490-4.

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Fan, Tianwen, Linxian Xu, Hao Tang, Lingyun Wang, and Derong Cao. "Chiral Perturbation Strategies for Circularly Polarized Thermally Activated Delayed-Fluorescence Small Molecules: Progress in the Application of Organic Light-Emitting Diodes." Nanomaterials 15, no. 13 (2025): 1053. https://doi.org/10.3390/nano15131053.

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The application of organic light-emitting diodes (OLEDs) has become widespread, with polarizers commonly employed to mitigate the influence of external light sources on OLED displays. However, when the light signal generated by the OLED emissive layer passes through the polarizer, approximately 50% of the light energy is inevitably lost. Circularly polarized luminescent (CPL) molecules, capable of emitting specific left- or right-handed circularly polarized light, theoretically enable 100% light energy utilization in corresponding OLED devices (CP-OLEDs). With this breakthrough, CPL mechanisms

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Wang, Jiong, and Shengdong Zhang. "High-efficiency tandem red organic light-emitting diodes adopting exciplex hosts." Journal of Physics: Conference Series 2842, no. 1 (2024): 012079. http://dx.doi.org/10.1088/1742-6596/2842/1/012079.

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Abstract Deep-red organic light-emitting diodes (OLEDs) exhibit significant potential for applications in infrared medical treatment and infrared imaging. However, the OLED performance drops significantly with increasing emission wavelength due to the energy gap law. To overcome this challenge, an efficient interfacial exciplex host, NPB/TPBi, has been developed. Simulation results indicate that the interfacial exciplex host demonstrates superior performance, compared with the bulk exciplex host and single host. To further boost the performance of red OLEDs, the interfacial exciplex host was i

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Kondakov, Denis Y. "Triplet–triplet annihilation in highly efficient fluorescent organic light-emitting diodes: current state and future outlook." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 373, no. 2044 (2015): 20140321. http://dx.doi.org/10.1098/rsta.2014.0321.

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Studies of delayed electroluminescence in highly efficient fluorescent organic light-emitting diodes (OLEDs) of many dissimilar architectures indicate that the triplet–triplet annihilation (TTA) significantly increases yield of excited singlet states—emitting molecules in this type of device thereby contributes substantially to their efficiency. Towards the end of the 2000s, the essential role of TTA in realizing highly efficient fluorescent devices was widely recognized. Analysis of a diverse set of fluorescent OLEDs shows that high efficiencies are often cor-related to TTA extents. It is the

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Kagatikar, Sneha, and Dhanya Sunil. "A systematic review on 1,8-naphthalimide derivatives as emissive materials in organic light-emitting diodes." Journal of Materials Science 57, no. 1 (2022): 105–39. http://dx.doi.org/10.1007/s10853-021-06602-w.

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AbstractOrganic light-emitting devices (OLEDs) have garnered significant research attention owing to their immense application prospects in leading technologies for full-color flat panel displays and eco-friendly solid-state lighting. They demonstrate exceptional features such as mercury-free construction, wide viewing angle, superior color quality and captivating flexibility. The requirements of light-emitting organic materials pertaining to high stability, lifetime and luminescence quantum yield, combined with the fabrication of devices with high performance efficiency, are highly challengin

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Jiang, Jixin, Suling Zhao, and Jun Yeob Lee. "45‐4: Investigation of Triplet‐induced Annihilation in Phosphorescent and Thermally activated delayed fluorescent organic light‐emitting diodes." SID Symposium Digest of Technical Papers 55, S1 (2024): 405–8. http://dx.doi.org/10.1002/sdtp.17094.

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Long‐lived triplets in phosphorescent organic light‐emitting diodes (PhOLEDs) and thermally activated delayed fluorescence (TADF) organic light‐emitting diodes (OLEDs) participate in triplet‐triplet annihilation and triplet‐polaron annihilation, dominantly deteriorating devices via defects serving as exciton quenchers. Although both PhOLEDs and TADF OLEDs suffer from the triplet exciton induced degradation mechanisms, detailed degradation processes are dissimilar in the two devices. Detailed degradation investigation of the PhOLEDs and TADF OLEDs was carried out by impedance spectroscopy and t

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Huang, Yongqi. "Recent research of materials for emissive layer of OLED." Journal of Physics: Conference Series 2608, no. 1 (2023): 012012. http://dx.doi.org/10.1088/1742-6596/2608/1/012012.

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Abstract As time has gone on, a lot of changes in display technology have taken place. Organic light-emitting diode (OLED) is the one of the many types of display technology. They have attracted many interests in the academic filed and commercial worlds, and developed rapidly since their earliest introduction. They are now highly regarded and used in the display and lighting industries due to a number of promising characteristics, such as environmentally friendly, high energy efficiency, large area, light weight, and thin shape. Among various light emitting materials, polymers have higher glas

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Kim, Sung Jin, Hyeon Jun Lee, Sung Kyu Kim, Chae Ryong Cho, and Se Young Jeong. "A Study on Spin Injection of Ferromagnetic Electrode for OLED Application." Advances in Science and Technology 52 (October 2006): 98–103. http://dx.doi.org/10.4028/www.scientific.net/ast.52.98.

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We have investigated the magnetic effect on the electrical properties of Al and Ni electrode based organic light-emitting devices (OLEDs). The Ni electrode-based OLEDs were compared to Al-based OLEDs in terms of their applied magnetic fields (0.3 T). We found that for current density-voltage on Al and Ni electrodes for OLEDs, Ni electrodes can be applied to OLEDs. The value of magneto-impedance or the resistance ratio decreased in comparison to situations with the absence of a magnetic field. The magneto-impedance or resistance effect indicated that the spin polarization was preserved through

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Sonar, Prashant, Sonsoles Garcia Santamaria, Ting Ting Lin, Alan Sellinger, and Henk Bolink. "Pyridine-Incorporated Dihexylquaterthiophene: A Novel Blue Emitter for Organic Light Emitting Diodes (OLEDs)." Australian Journal of Chemistry 65, no. 9 (2012): 1244. http://dx.doi.org/10.1071/ch12171.

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The synthesis and characterisation of 2,5-bis(5′-hexyl-[2,2′-bithiophen]-5-yl)pyridine (Th4PY) and its use as a blue emitter in organic light emitting diodes (OLEDs) is reported. Th4PY was synthesised in high yield using a straightforward Suzuki coupling route with commercially available starting materials. As Th4PY is both soluble and has low molecular weight, blue OLEDs were fabricated using both spin-coating and vacuum deposition thin film processing techniques to study the effect of processing on device performance. OLED devices using a spin-coated layer consisting of 4′,4′′-tris(N-carbazo

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Nan, Ji, Yupei Zhang, Zhi Huang, Long Chen, and Bong‐Geum Lee. "21‐2: Modulus Spectroscopy and Capacitance‐Voltage Measurement of OLEDs as Tools for Estimating Charge Dynamics." SID Symposium Digest of Technical Papers 55, no. 1 (2024): 260–63. http://dx.doi.org/10.1002/sdtp.17504.

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In the past few decades, the injection and transporting characteristics of charge carriers in organic light emitting diodes (OLEDs) have been analyzed using hole‐only and electron‐only devices (HODs and EODs). However, such methods cannot fully explain the dynamic characteristics of OLEDs such as charge accumulation and recombination. In this study, we well‐established the combination of modulus spectroscopy and capacitance‐voltage measurement and applied it to describe the carrier dynamics in OLED devices.

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Barah, Dhruvajyoti, Subhamoy Sahoo, Naga Sai Manoj Inaganti, Haripriya Kesavan, Jayeeta Bhattacharyya, and Debdutta Ray. "Investigation of 4,4′-bis[(N- carbazole) styryl] biphenyl (BSB4) for a pure blue fluorescent OLED with enhanced efficiency nearing the theoretical limit." Semiconductor Science and Technology 37, no. 3 (2022): 035006. http://dx.doi.org/10.1088/1361-6641/ac48db.

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Abstract 4,4′-bis[(N-carbazole) styryl] biphenyl (BSB4 or BSBCz) is one of the widely studied organic fluorescent materials for blue organic electroluminescent devices in the recent times. In this work, BSB4 is used as a guest material to construct the host-guest matrix for the emissive layer (EML) of a pure blue fluorescent organic light-emitting diode (OLED). A pure blue emission suitable for display application with a Commission Internationale de l’Eclairage coordinate of (0.147,0.070) is achieved by the blue-shift of the emission spectrum of the host-guest matrix from that of the pristine

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LI, Yilian, Na LIU, Pengchao ZHOU, Weixia LAN, Huayan PU, and Yingjie LIAO. "Efficient and Color-tunable Organic Light-emitting Diodes for Rear Light Application on the Motor Vehicle." Materials Science 27, no. 3 (2021): 264–68. http://dx.doi.org/10.5755/j02.ms.24678.

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By designing double emissive layers, orange light-emitting layer (EML) and red EML and a space layer of blending hole-transporting material (HTM) with electron-transporting material (ETM), we have achieved efficient and color-tunable organic light-emitting diodes (OLEDs). It is found that the red shift of EL spectrum was enhanced when the ratio of HTM to ETM was 5:1. And a maximum current efficiency of 41.17 cd/A was reached. It has been demonstrated that two ultra-thin emissive layers could improve the current efficiency of the OLEDs. The current efficiency of the OLEDs with a 1 nm o;6range E

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Cromwell, J., S. A. Adeniji, D. O. Oyewole, et al. "Effects of blister formation on the degradation of organic light emitting devices." AIP Advances 12, no. 3 (2022): 035308. http://dx.doi.org/10.1063/5.0082229.

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This paper presents the results of a combined experimental and computational study of the mechanisms of blister formation, and their effects on the degradation of organic light emitting devices (OLEDs). Blister formation is attributed to the effects of thermally induced mismatch stresses associated with applied bias. These result in interfacial cracking phenomena that are affected by the solvents that are used in OLED fabrication. The OLEDs are first fabricated using an electron transport layer of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) deposited on an active layer made from so

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Aleksandrova, Mariya. "Specifics and Challenges to Flexible Organic Light-Emitting Devices." Advances in Materials Science and Engineering 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/4081697.

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Several recent developments in material science and deposition methods for flexible organic light-emitting devices (OLEDs) are surveyed. The commonly used plastic substrates are compared, according to their mechanical, optical, thermal, and chemical properties. Multilayer electrode structures, used as transparent electrodes, replacing conventional indium tin oxide (ITO) are presented and data about their conductivity, transparency, and bending ability are provided. Attention is paid to some of the most popular industrial processes for flexible OLEDs manufacturing, such as roll-to-roll printing

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Daumann, S., D. Andrzejewski, M. Di Marcantonio, et al. "Water-free synthesis of ZnO quantum dots for application as an electron injection layer in light-emitting electrochemical cells." Journal of Materials Chemistry C 5, no. 9 (2017): 2344–51. http://dx.doi.org/10.1039/c6tc05571k.

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Large-area light emitters like organic (OLEDs) or quantum dot light-emitting devices (QLEDs) and light-emitting electrochemical cells (LECs) have gained increasing interest due to their cost-effective fabrication on various even flexible substrates.

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Bae, Eun-Jeong, Hyeong-Kyu Maeng, Ji-Soo Shin, Dong-Wook Park, Young-Wook Park, and Dong-Hyun Baek. "Micro-Sphere PDMS for Enhancing Light Extraction in Organic Light-Emitting Devices." Nanomaterials 12, no. 12 (2022): 2007. http://dx.doi.org/10.3390/nano12122007.

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We present a micro-sphere PDMS film to improve the external quantum efficiency (EQE) in OLEDs. The micro-sphere PDMS film was fabricated with the breath figure (BF) and replica molding process. The polymer template was prepared through stabilization of the water droplets at the polymer/water interface. The micro-sphere PDMS film was fabricated by pouring PDMS on the polymer template. At a 45 mg/mL concentration, the size of the spheres was approximately 12.3 µm and they had the most circular shape, so this condition yielded the best performance, with an improvement of 33% in the EQE and the wi

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FENG, TAO, XI WANG, FU MIN ZHANG, et al. "SILICON NITRIDE THIN FILMS PACKAGING FOR FLEXIBLE ORGANIC LIGHT EMITTING DEVICES." International Journal of Modern Physics B 16, no. 06n07 (2002): 1052–56. http://dx.doi.org/10.1142/s0217979202010841.

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We present a simple thin film encapsulation technique for organic light emitting devices (OLEDS), for use in flexible flat panel displays (FPDs). We systematically studied the moisture-resistant properties of silicon nitride thin films prepared by plasma-enhanced chemical vapor deposition (PECVD) and found that silicon nitride thin films have a low water vapor permeation (WVP) rate even deposited at low substrate temperature (20°C). Then OLEDs prototypes were successfully packaged by depositing silicon nitride thin films on them. Based on the analysis of the degradation of the OLEDs, we found

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Lee, Seok Je, Jun Li, Seung Il Lee, et al. "Effects of MEH-PPV Molecular Ordering in the Emitting Layer on the Luminescence Efficiency of Organic Light-Emitting Diodes." Molecules 26, no. 9 (2021): 2512. http://dx.doi.org/10.3390/molecules26092512.

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We investigated the effects of molecular ordering on the electro-optical characteristics of organic light-emitting diodes (OLEDs) with an emission layer (EML) of poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV). The EML was fabricated by a solution process which can make molecules ordered. The performance of the OLED devices with the molecular ordering method was compared to that obtained through fabrication by a conventional spin coating method. The turn-on voltage and the luminance of the conventional OLEDs were 5 V and 34.75 cd/m2, whereas those of the proposed OLEDs were

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Chiba, Takayuki, Yong-Jin Pu, and Junji Kido. "Solution-processable electron injection materials for organic light-emitting devices." Journal of Materials Chemistry C 3, no. 44 (2015): 11567–76. http://dx.doi.org/10.1039/c5tc02421h.

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Joly, D., P. A. Bouit, and M. Hissler. "Organophosphorus derivatives for electronic devices." Journal of Materials Chemistry C 4, no. 17 (2016): 3686–98. http://dx.doi.org/10.1039/c6tc00590j.

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This review presents the main class of organophosphorus compounds (triaryl phosphines, phosphazenes, phospholes, phosphetes and diphosphacyclobutanes), which have been used in electronic devices (organic light-emitting diodes (OLEDs), organic photovoltaic cells (OPV cells), dye-sensitized solar cells (DSSCs), organic field-effect transistors (OFETs), and electrochromic cells).

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