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
Color-stable WRGB emission from blue OLEDs with quantum dots-based patterned down-conversion layer
TL;DR: In this article, a color-stable white, red, green and blue emission was achieved from efficient blue bottom-emitting OLEDs with color filters and two types of patterned down-conversion films containing red and green quantum dots.
Journal ArticleDOI
Long-lasting and efficient inverted pure blue organic light-emitting diodes by inserting an ultrathin aluminum interlayer
Jiajie Liu,Yilian Li,Shuanglong Wang,Zhitian Ling,Hong Lian,Tao Xu,Xiaowen Zhang,Yingjie Liao,Bin Wei +8 more
TL;DR: In this paper, an ultrathin aluminum interlayer between the indium tin oxide (ITO) cathode and the electron injection layer of an inverted pure blue OLED was proposed to enhance the lifetime of the OLED.
Stacked inverted top-emitting white organic light-emitting diodes
TL;DR: In this article, a stacked inverted top-emitting white electrophosphorescent organic light emitting diodes (OLEDs) are demonstrated, which consist of orange and blue light emitting units interconnected with a connecting unit of 1,4,5,8,9,11-hexatriphenylene hexacarbonitrile/Al/LiF.
Journal ArticleDOI
An ultra-thin gold nanoparticle layer modified cathode for the enhanced performance of polymer light emitting diodes
Xiaoyan Wu,Xiaoyan Wu,Yuzhao Yang,Xin Chi,Tao Han,Muddasir Hanif,Linlin Liu,Zengqi Xie,Xudong Chen,Yuguang Ma +9 more
TL;DR: In this article, an ultra-thin gold nanoparticle layer on the cathode of polymer light emitting diodes has been used to enhance the performance of polymer optoelectronic devices through their electric properties.
Journal ArticleDOI
Hybrid organic light-emitting device based on ultrasonic spray-coating molybdenum trioxide transport layer with low turn-on voltage, improved efficiency & stability
Shihao Liu,Xiang Zhang,Shirong Wang,Haiwei Feng,Jiaxin Zhang,Huishan Yang,Letian Zhang,Wenfa Xie +7 more
TL;DR: In this paper, a hybrid organic light-emitting devices (OLEDs) employing inorganic oxides as carrier transport layer can further improve the performances of OLEDs, such as power efficiency, reduce turn-on voltage and enhance stability.
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.