Journal ArticleDOI
Development of high performance OLEDs for general lighting
Hisahiro Sasabe,Junji Kido +1 more
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
Photoemission spectroscopy study on interfacial energy level alignments in tandem organic light-emitting diodes
TL;DR: In this paper, the electronic structures of various transition metal oxide (TMO)-based CGLs and their role in charge generation process are reviewed, addressing the n-type doping impact of organic layers, thermal annealing-induced oxygen vacancy in TMOs, and the interfacial stability of Cgls on the device operational lifetime.
Journal ArticleDOI
Dynamic processes of charges generation in intermediate connectors for tandem organic light emitting diodes
Jinpeng Yang,Wen-Qin Wang,Lin-Tai Shang,Liwen Cheng,Xiaoshuang Shen,Xianghua Zeng,Yan-Qing Li,Jian-Xin Tang +7 more
TL;DR: In this paper, the role of transition metal oxides (TMOs) based intermediate connectors in tandem organic light emitting diodes (OLEDs) has been studied via capacitancevoltage and current-voltage characteristics, in order to elucidate the dynamic processes of charges generation and transport within externally applied voltages.
Journal ArticleDOI
A white emitting poly(phenylenevinylene)
TL;DR: In this article, a white copolymer with the polyphenylenevinylene (PPV) structure was obtained via the Stille cross-coupling reaction, where the substitution of hydrogen atoms with fluorine atoms on the vinylene units of poly(1,4-dialkoxyphenylenedifluorovinylene) shifts the emission from orange-red to blue.
Journal ArticleDOI
Efficient red electroluminescent devices with very low operation voltage by utilizing hole and electron transport materials as the host
Xuesen Zhao,Xuesen Zhao,Liang Zhou,Qi Zhu,Rongzhen Cui,Yingjie Cui,Weiqiang Liu,Jiahai Wang,Xiaoyun Mi +8 more
TL;DR: In this article, a red electroluminescent (EL) device with very low operation voltage based on iridium complex iridium(Ш)bis(2-phenylquinoly-N,C2′)-dipivaloylmethane (PQ2Ir(dpm)) was reported.
Journal ArticleDOI
Effect of hole transporting materials on the emission characteristics of soluble processed organic light-emitting devices on the plastic substrate
TL;DR: In this article, the authors have fabricated solution processed organic light-emitting devices (OLEDs) with various hole transporting materials (HTMs) on the plastic substrate, the device structure was ITO/HTM:Ir(2-phq)3 1w
References
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Journal ArticleDOI
Organic Electroluminescent Diodes
Ching Wan Tang,Steven A Vanslyke +1 more
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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.