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
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Journal ArticleDOI
Emergence of White Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence
TL;DR: In this article, the fundamental concepts of thermally activated delayed fluorescence (TADF) have been firstly introduced and main approaches to realize WOLEDs based on TADF have been summarized.
Journal ArticleDOI
Flexible organic light-emitting diodes for solid-state lighting
Min-Ho Park,Tae Hee Han,Young-Hoon Kim,Su-Hun Jeong,Yeongjun Lee,Hong-Kyu Seo,Himchan Cho,Tae-Woo Lee +7 more
TL;DR: In this article, the authors review and discuss progress made in these three technologies for solid-state lighting using flexible organic light-emitting diodes (OLEDs) and discuss the technical challenges associated with the development of high performing flexible substrates, electrode materials compatible with these substrates and good encapsulation techniques.
Journal ArticleDOI
Aggregation-Induced Delayed Fluorescence Luminogens for Efficient Organic Light-Emitting Diodes.
Jiajie Zeng,Jingjing Guo,Hao Liu,Jacky Wing Yip Lam,Zujin Zhao,Shuming Chen,Ben Zhong Tang,Ben Zhong Tang +7 more
TL;DR: Inspired by their AIDF nature, the green-emission non-doped OLEDs based on them are fabricated, which afford good electroluminescence performances, with low turn-on voltages and very small efficiency roll-off.
Journal ArticleDOI
Optical and charge transport properties of N-butyl-1,8-naphthalimide derivatives as organic light-emitting materials: A theoretical study
TL;DR: In this paper, a series of N-butyl-1,8-naphthalimide derivatives have been designed to explore their optical, electronic, and charge transport properties as charge transport and/or luminescent materials for organic light-emitting diodes (OLEDs).
Journal ArticleDOI
Probing photophysical properties of isomeric N-heterocyclic carbene Ir(iii) complexes and their applications to deep-blue phosphorescent organic light-emitting diodes
Yang-Jin Cho,So-Yoen Kim,Jin-Hyoung Kim,Ji-won Lee,Dae Won Cho,Seungjun Yi,Ho-Jin Son,Won-Sik Han,Sang Ook Kang +8 more
TL;DR: Two isomeric N-heterocyclic carbene Ir(III) complexes were isolated and systematic investigation of their photophysical and electrochemical properties was carried out in this paper, where the crystal structure of the meridional isomer, m-Ir-(dbfmi)3, was determined.
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.
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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.
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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.