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
Efficient piezochromic luminescence from tetraphenylethene functionalized pyridine-azole derivatives exhibiting aggregation-induced emission
Yang Cui,Yong-Min Yin,Hong-Tao Cao,Min Zhang,Guo-Gang Shan,Haizhu Sun,Yong Wu,Zhong-Min Su,Wenfa Xie +8 more
TL;DR: In this paper, tetraphenylethene functionalized pyridine-azole derivatives were successfully synthesized and characterized, and their photophysical properties in both solution and solid-state were investigated systematically.
Journal ArticleDOI
Highly efficient inkjet printed flexible organic light-emitting diodes with hybrid hole injection layer
Chen Feng,Xiaojing Zheng,Rui Xu,Yuangui Zhou,Hailong Hu,Tailiang Guo,Junqiao Ding,Lei Ying,Fushan Li +8 more
TL;DR: In this article, a hybrid hole injection layer is employed to improve the device efficiency, where the polyethylene glycol (PEG) is used to modify the energy level and conductivity of the conventional hole injection layers poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), which regulates the amount of holes entering the organic light-emitting layer, realizes the injection balance of carriers, and nearly doubles the green device efficiency with the record high maximum external quantum efficiency (EQE) of
Journal ArticleDOI
Novel Emission Color-Tuning Strategies in Heteroleptic Phosphorescent Ir(III) and Pt(II) Complexes.
TL;DR: In this personal account, a special emphasis is put on contributions to the novel color-tuning strategies in these heteroleptic ppy-type Ir(III) and Pt(II) complexes that can be furnished to bring high EL performances.
Journal ArticleDOI
Electroluminescent and Optoelectronic Properties of OLEDs with Bay-Extended, Distorted Perylene Esters as Emitter Materials.
TL;DR: Three esters with a perylene, a unilaterally, and a bilaterally extended perylene core, respectively, were used as emitter materials for organic light-emitting diodes and the electroluminescent properties were studied.
Journal ArticleDOI
Reliable, All-Phosphorescent Stacked White Organic Light Emitting Devices with a High Color Rendering Index
TL;DR: In this paper, the authors demonstrate stacked white phosphorescent light emitting devices (SWOLEDs) with lifetime of up to 80000 h, with correlated color temperature ranges between 2780 and 3300 K, with color rendering index as high as 89.
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.