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
Transition Metal Dichalcogenide‐Based Transistor Circuits for Gray Scale Organic Light‐Emitting Displays
TL;DR: In this article, two transition metal dichalcogenide (TMD) transistors are applied to demonstrate their possibility as switching/driving elements for the pixel of organic light-emitting diode (OLED) display.
Journal ArticleDOI
High-performance hybrid white organic light-emitting diodes exploiting blue thermally activated delayed fluorescent dyes
TL;DR: In this paper, the bipolar interlayer was proposed to enhance the lifetime of TADF-based hybrid white organic light-emitting diodes (WOLEDs).
Journal ArticleDOI
A series of fluorinated phenylpyridine-based electron-transporters for blue phosphorescent OLEDs
Takahiro Kamata,Hisahiro Sasabe,Yuichirio Watanabe,Daisuke Yokoyama,Hiroshi Katagiri,Junji Kido +5 more
TL;DR: In this article, a series of fluorinated phenylpyridine-based electron-transport materials (ETMs) for organic light-emitting devices (OLEDs) based on 3,5,3,′,5′′-tetra-3-pyridyl-[1,1′;3′, 1′]terphenyl (B3PyPB) were developed, and the influence of fluorine atom(s) in the core skeleton on their physical properties, such as molecular orientation, electron transport and electron injection, was investigated
Journal ArticleDOI
Vacuum-deposited MoO3/Ag/WO3 multilayered electrode for highly efficient transparent and inverted organic light-emitting diodes
TL;DR: In this article, a transparent and inverted organic light-emitting diode (OLED) with a vacuum-deposited MoO3 (5'nm)/Ag (12'n)/WO3(40'n) (MAW) multilayered electrode has been reported.
Journal ArticleDOI
Adjusting Nitrogen Atom Orientations of Pyridine Ring in Tetraphenylsilane-Based Hosts for Highly Efficient Blue Phosphorescent Organic Light-Emitting Devices.
Qing Bai,He Liu,Liang Yao,Tong Shan,Jinyu Li,Yu Gao,Zhe Zhang,Yulong Liu,Ping Lu,Bing Yang,Yuguang Ma +10 more
TL;DR: The current efficiency and external quantum efficiency are improved 3-fold, higher than those fabricated from DCSpP with 4-pyridyl as substituent, demonstrating an effective strategy for large improvement in device performance by a subtle change in molecular structure.
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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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.