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
Naphthyridin-based Iridium(III) Complexes for Green to Red OLEDs with EQEs over 30% and Low Efficiency Roll-off
TL;DR: In this paper , four naphthyridin-based iridium(III) complexes, namely (dfpmp)2Ir(mmND), (mtfmpp) 2Ir(mnd), (tfmptp) 2 Ir(mND), and (mfmptp), were designed and synthesized, with tunable emission peak wavelengths from 521 nm to 600 nm.
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Bis(N-naphthyl-N-phenylamino)benzophenones as exciton-modulating materials for white TADF OLEDs with separated charge and exciton recombination zones
Malek Mahmoudi,Jonas Keruckas,Dmytro Volyniuk,Viktorija Andrulevičienė,Rasa Keruckienė,Edgaras Narbutaitis,Yu Chiang Chao,Martins Rutkis,Juozas V. Grazulevicius +8 more
TL;DR: In this paper, two 4,4'-bis(N-naphthyl-N-phenylamino)benzophenones were synthesized using isomeric N-Naphthymyl N-phenymines as donors and benzophenone as the acceptor moiety for efficient and stable white organic light emitting diodes.
Journal ArticleDOI
Seven-Member-Ring Based Electron-Transporting Materials for High-efficiency OLEDs
Kuo-Hsien Chou,Tun-Hao Chen,Xian-Qing Huang,Chia-Sheng Huang,Chih-Hao Chang,Chien-Tien Chen,Jwo-Huei Jou +6 more
TL;DR: In this paper , the design and synthesis of organic light-emitting diodes (OLEDs) have become the mainstream display technology and show potential in lighting, with a constant demand of higher efficiency and longer lifetime.
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.
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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.