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
Realization of Highly Efficient Red Phosphorescence from Bis-Tridentate Iridium(III) Phosphors.
TL;DR: Design of five bis-tridentate Ir(III) metal complexes, to which both of their monoanionic ancillary and dianionic chromophoric chelate were functionalized derivative of 2-pyrazolyl-6-phenylpyridine, confirmed that the T1 excited state of all investigated Ir( III) complexes shows a mixed metal-to-ligand charge transfer (MLCT), intraligand chargeTransfer (ILCT), ligand-to
Journal ArticleDOI
Regulating charges and excitons in simplified hybrid white organic light-emitting diodes: The key role of concentration in single dopant host–guest systems
Baiquan Liu,Miao Xu,Lei Wang,Jianhua Zou,Hong Tao,Yueju Su,Dongyu Gao,Honglong Ning,Linfeng Lan,Junbiao Peng +9 more
TL;DR: A series of high performance hybrid white organic light-emitting diodes (WOLEDs) with simplified structures is developed by systematically investigating the influence of dopant concentrations as mentioned in this paper.
Journal ArticleDOI
Pyrene-Based Approach to Tune Emission Color from Blue to Yellow
Chuan-Zeng Wang,Hisashi Ichiyanagi,Koya Sakaguchi,Xing Feng,Mark R. J. Elsegood,Carl Redshaw,Takehiko Yamato +6 more
TL;DR: A facile strategy to tune the emission color of pyrene-based chromophores has been established by simple functional group modification at the para position to the diphenylamino on the donor building block.
Journal ArticleDOI
Phenothiazine-based bipolar green-emitters containing benzimidazole units: synthesis, photophysical and electroluminescence properties
TL;DR: A series of bipolar green emitters bearing hole-transporting phenothiazine and electron-transport N-phenylbenzimidazole are synthesized and characterized by their photophysical, electrochemical and thermal properties as discussed by the authors.
Journal ArticleDOI
Combining emissions of hole- and electron-transporting layers simultaneously for simple blue and white organic light-emitting diodes with superior device performance
Yanqin Miao,Kexiang Wang,Long Gao,Bo Zhao,Zhongqiang Wang,Yaping Zhao,Aiqin Zhang,Hua Wang,Yuying Hao,Bingshe Xu +9 more
TL;DR: In this paper, an efficient deep-blue fluorescent organic light-emitting diode (OLED), showing an emission peak at 432 nm, a high luminance of 14.140 cd m−2, and an external quantum efficiency (EQE) of 5.07% (which exceeds the theoretical limit), was developed by employing a simple bilayer structure.
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
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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.