Journal ArticleDOI
Recent Progress in High‐Efficiency Blue‐Light‐Emitting Materials for Organic Light‐Emitting Diodes
Yirang Im,Seong Yong Byun,Ji Han Kim,Dong Ryun Lee,Chan Seok Oh,Kyoung Soo Yook,Jun Yeob Lee +6 more
TLDR
In this article, the authors summarized recent developments in blue fluorescent, phosphorescent and thermally activated delayed fluorescent emitters, and suggested key issues for each emitter and future development strategies.Abstract:
Organic light-emitting diodes (OLEDs) are increasingly used in displays replacing traditional flat panel displays; e.g., liquid crystal displays. Especially, the paradigm shifts in displays from rigid to flexible types accelerated the market change from liquid crystal displays to OLEDs. However, some critical issues must be resolved for expansion of OLED use, of which blue device performance is one of the most important. Therefore, recent OLED material development has focused on the design, synthesis and application of high-efficiency and long-life blue emitters. Well-known blue fluorescent emitters have been modified to improve their efficiency and lifetime, and blue phosphorescent emitters are being investigated to overcome the lifetime issue. Recently, thermally activated delayed fluorescent emitters have received attention due to the potential of high-efficiency and long-living emitters. Therefore, it is timely to review the recent progress and future prospects of high-efficiency blue emitters. In this feature article, we summarize recent developments in blue fluorescent, phosphorescent and thermally activated delayed fluorescent emitters, and suggest key issues for each emitter and future development strategies.read more
Citations
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Journal ArticleDOI
Marching Toward Highly Efficient, Pure-Blue, and Stable Thermally Activated Delayed Fluorescent Organic Light-Emitting Diodes
Xinyi Cai,Shi-Jian Su +1 more
Journal ArticleDOI
Blue organic light-emitting diodes: current status, challenges, and future outlook
Jiun-Haw Lee,Chia-Hsun Chen,Pei-Hsi Lee,Hung-Yi Lin,Man-kit Leung,Tien-Lung Chiu,Chi-Feng Lin +6 more
TL;DR: The recent progress of efficiency improvement, emission color tuning, and lifetime elongation of blue organic light-emitting diodes (OLEDs) is reviewed in this paper.
Journal ArticleDOI
Aggregation-induced emission: a coming-of-age ceremony at the age of eighteen
TL;DR: Aggregation-induced emission (AIE) has drawn great attention worldwide for its unique optical phenomenon and huge potential applications as discussed by the authors, which has been deeply investigated and widely utilized in many important areas, such as organic light-emitting diode (OLED), sensor, and bio-imaging.
Journal ArticleDOI
Highly Efficient Blue Fluorescent OLEDs Based on Upper Level Triplet–Singlet Intersystem Crossing
Yuwei Xu,Xiaoming Liang,Xuehong Zhou,Peisen Yuan,Peisen Yuan,Jiadong Zhou,Cong Wang,Binbin Li,Dehua Hu,Xianfeng Qiao,Xiao-Fang Jiang,Linlin Liu,Shi-Jian Su,Dongge Ma,Yuguang Ma +14 more
TL;DR: Results reveal that the "hot exciton" path is a promising way to exploit high efficient, stable fluorescent emitters, especially for the pure-blue and deep-blue fluorescent organic light-emitting devices.
Journal ArticleDOI
Efficient Red/Green/Blue Tandem Quantum-Dot Light-Emitting Diodes with External Quantum Efficiency Exceeding 21.
TL;DR: The demonstrated full-color tandem QLEDs, with extremely high efficiency, long operational lifetime, low roll-off efficiency, and high color purity, would be ideal candidates to bring Q LEDs into the next generation of full- color displays and the solid-state lighting market.
References
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Highly efficient organic light-emitting diodes from delayed fluorescence
Hiroki Uoyama,Kenichi Goushi,Kenichi Goushi,Katsuyuki Shizu,Hiroko Nomura,Chihaya Adachi,Chihaya Adachi +6 more
TL;DR: A class of metal-free organic electroluminescent molecules in which the energy gap between the singlet and triplet excited states is minimized by design, thereby promoting highly efficient spin up-conversion from non-radiative triplet states to radiative singlet states while maintaining high radiative decay rates.
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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.
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
Efficient blue organic light-emitting diodes employing thermally activated delayed fluorescence
Qisheng Zhang,Bo Li,Shuping Huang,Hiroko Nomura,Hiroyuki Tanaka,Chihaya Adachi,Chihaya Adachi +6 more
TL;DR: In this article, a blue organic light-emitting diodes that harness thermally activated delayed fluorescence was realized with an external quantum efficiency of 19.5% and reduced roll-off at high luminance.
Journal ArticleDOI
Thermally Activated Delayed Fluorescence Materials Towards the Breakthrough of Organoelectronics
Ye Tao,Kai Yuan,Ting Chen,Peng Xu,Huanhuan Li,Runfeng Chen,Chao Zheng,Lei Zhang,Wei Huang,Wei Huang +9 more
TL;DR: An overview of the quick development in TADF mechanisms, materials, and applications is presented, with a particular emphasis on their different types of metal-organic complexes, D-A molecules, and fullerenes.