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
Exploring Efficient Blue Thermally Activated Delayed Fluorescence Emitters by Constructing Intramolecular Hydrogen Bonds
TL;DR: In this paper , a series of efficient blue thermally activated delayed fluorescence materials comprised of a benzonitrile acceptor, pyridine bridge, and carbazole-based donors is designed and synthesized.
Journal ArticleDOI
Highly Efficient and Stable Hybrid White Organic Light Emitting Diodes with Controllable Exciton Behavior by a Mixed Bipolar Interlayer
TL;DR: In this article, a hybrid white organic light-emitting diodes (HWOLEDs) with a mixed bipolar interlayer between fluorescent blue and phosphorescent yellow emitting layers are demonstrated.
Book ChapterDOI
Charge Transport Study of OPV Polymers and Their Bulk Heterojunction Blends by Admittance Spectroscopy
TL;DR: In this article, an alternative transport characterization tool is introduced to extract charge carrier mobility in semiconducting polymers, where the complex impedance of the polymer is obtained by exciting the sample (a thin film sandwiched by two electrodes) with an ac voltage source and the analysis of measured time dependent current of the sample allows the extraction of carrier mobility.
Journal ArticleDOI
P-151: Optical Efficiency Enhancement of Organic Light-Emitting Diode Based on a Nano-Sized Stripe Auxiliary Electrode
Yong Sub Shim,Ju Hyun Hwang,Hyun Jun Lee,Kyung Bok Choi,Kyu Nyun Kim,Cheol Hwee Park,Sun Gyu Jung,Young Wook Park,Byeong Kwon Ju +8 more
TL;DR: In this paper, a nano-sized stripe auxiliary electrode was used to supplement the shortcomings of micro-sized that while maintaining the high optical advantages, by conjugating the conditions of laser interference lithography (LIL).
Journal ArticleDOI
Fabrication of wrinkle-patterned polydimethylsiloxane films as light out-coupling structure for white OLEDs
Juncong Chen,Yuhuan Chen,Yanqiong Zheng,Weian Chen,Qingyu Zhang,Bingjia Zhao,Xifeng Li,Junbiao Peng +7 more
TL;DR: In this article , a wrinkle-patterned polydimethylsiloxane (PDMS) films were introduced into two different white OLED devices to extract the light of the substrate mode at the substrate-air interface.
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.