Journal ArticleDOI
Development of high performance OLEDs for general lighting
Hisahiro Sasabe,Junji Kido +1 more
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TLDR
The first white organic light-emitting device (OLED) was developed in 1993, and the power efficiency and lifetime of this white OLED were reportedly only < 1 lm W−1 and < 1 day, respectively.Abstract:
Since the development of the first white organic light-emitting device (OLED) in 1993, twenty years have passed. The power efficiency and lifetime of this white OLED were reportedly only <1 lm W−1 and <1 day, respectively. However, recent rapid advances in material chemistry have enabled the use of white OLEDs for general lighting. In 2012, white OLED panel efficiency has reached 90 lm W−1 at 1000 cd m−2, and a tandem white OLED panel has realized a lifetime of over 100 000 hours. What is more important in OLEDs is to shed clear light on the new design products, such as transparent lighting panels and luminescent wallpapers. These fascinating features enable OLEDs as a whole new invention of artificial lighting. In this review, we would like to overview the recent developments of white OLED, especially three key elemental technologies related to material chemistry: (1) low operating voltage technology, (2) phosphorescent OLED technology and (3) multi-photon emission (MPE) device technology.read more
Citations
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Journal ArticleDOI
Efficient blue organic light-emitting diodes with low operation voltage by improving the injection and transport of holes
Xuesen Zhao,Xuesen Zhao,Liang Zhou,Qi Zhu,Yujia Wang,Rongzhen Cui,Yingjie Cui,Weiqiang Liu,Xiaoyun Mi +8 more
TL;DR: In this paper, the authors reported the highly efficient organic electroluminescent (EL) devices based on blue phosphorescent material FIr6, which achieved the maximum current efficiency, power efficiency, external quantum efficiency (EQE) and brightness up to 39.14cd/A, 38.68 lm/W, 24.73
Journal ArticleDOI
Novel benzonitrile-based AIE host with high triplet energy for highly efficient solution-processed blue TADF OLEDs
TL;DR: Wang et al. as discussed by the authors designed and synthesized three novel AIE-active materials with twisted donor-acceptor structures (3phCNCz, 3phCN-ICz and 3phCPCN-tCzICz) by modifying the donor unit, which exhibited high triplet energies (>2.80 eV) to prevent exciton returning and aggregation induced emission (AIE) property for suppressing exciton quenching.
Journal ArticleDOI
Asymmetric Spirobiacridine-based Delayed Fluorescence Emitters for High-performance Organic Light-Emitting Devices
TL;DR: Various asymmetric spirobiacridine-based TADF emitters with a unity photoluminescence quantum yield and high Θ ratio of over 80%, and the substitution effects of the triazine acceptor unit on the photophysical properties, including molecular orientations and OLED performance are studied.
Dissertation
New Color Patterning Techniques for OLED Displays
TL;DR: In this article, two color patterning techniques for organic light emitting devices (OLEDs) are proposed, which use laser-patterned polyimide (PI) sheets as shadow masks.
Journal ArticleDOI
Deep blue exciplex tandem OLEDs using n- and p-doped planar heterojunction as a charge generation layer
TL;DR: The conventional and inverted tandem organic light-emitting diodes (OLEDs) have the advantages of small current density, high current efficiency (CE), and long lifetime as mentioned in this paper .
References
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Journal ArticleDOI
Organic Electroluminescent Diodes
Ching Wan Tang,Steven A Vanslyke +1 more
TL;DR: In this article, a double-layer structure of organic thin films was prepared by vapor deposition, and efficient injection of holes and electrons was provided from an indium-tinoxide anode and an alloyed Mg:Ag cathode.
Journal ArticleDOI
Very high-efficiency green organic light-emitting devices based on electrophosphorescence
TL;DR: In this paper, the performance of an organic light-emitting device employing the green electrophosphorescent material, fac tris(2-phenylpyridine) iridium [Ir(ppy)3] doped into a 4,4′-N,N′-dicarbazole-biphenyl host was described.
Journal ArticleDOI
White organic light-emitting diodes with fluorescent tube efficiency
Sebastian Reineke,Frank Lindner,Gregor Schwartz,Nico Seidler,Karsten Walzer,Björn Lüssem,Karl Leo +6 more
TL;DR: An improved OLED structure which reaches fluorescent tube efficiency and focuses on reducing energetic and ohmic losses that occur during electron–photon conversion, which could make white-light OLEDs, with their soft area light and high colour-rendering qualities, the light sources of choice for the future.
Journal ArticleDOI
Charge Transport in Disordered Organic Photoconductors a Monte Carlo Simulation Study
Journal ArticleDOI
Management of singlet and triplet excitons for efficient white organic light-emitting devices
Yiru Sun,Noel C. Giebink,Hiroshi Kanno,Biwu Ma,Mark E. Thompson,Stephen R. Forrest,Stephen R. Forrest +6 more
TL;DR: This device challenges incandescent sources by exhibiting total external quantum and power efficiencies that peak at 18.7 ± 0.6 lm W-1, respectively, and two distinct modes of energy transfer within this device serve to channel nearly all of the triplet energy to the phosphorescent dopants, retaining the singlet energy exclusively on the blue fluorescent dopant.