Aggregation-Induced Delayed Fluorescence Luminogens with Accelerated Reverse Intersystem Crossing for High-Performance OLEDs

Xu, Jingwen1; Zhu, Xiangyu1; Guo, Jingjing1; Fan, Jianzhong2; Zeng, Jiajie1; Chen, Shuming3; Zhao, Zujin1; Tang, Ben Zhong1,4

2019-12

10.1021/acsmaterialslett.9b00369

ACS Materials Letters   影响因子和分区

2639-4979

2639-4979

A fast reverse intersystem crossing (RISC) is of high importance for delayed fluorescence emitters in terms of increasing exciton utilization and suppressing efficiency roll-off. Herein, new robust luminogens comprised of carbonyl, phenoxazine, and chlorine-substituted carbazole derivatives are synthesized and characterized. They have distinct aggregation-induced delayed fluorescence (AIDF) features and exhibit high photoluminescence efficiencies and short delayed fluorescence lifetimes in neat films. The RISC is conspicuously accelerated because of their tiny singlet-triplet energy splitting and greatly enhanced spin-orbit coupling by heavy atom effect in neat in nondoped OLEDs, providing excellent maximum electroluminescence (EL) efficiencies of 20.4-21.7%, and can also perform outstandingly in doped OLEDs in a wide doping concentration range (5-90 wt %), affording impressive EL efficiencies of up to 100.1 cd A(-1), 104.8 lm W-1, and 29.1%, with small efficiency roll-off. These findings demonstrate the AIDF luminogens with fast RISC are promising candidates to fulfill various demands of production and application of OLEDs.

ESCI ; EI

英语

其他

National Natural Science Foundation of China[21788102] ; Natural Science Foundation of Guangdong Province[2019B030301003] ; Science and Technology Program of Guangzhou[201804020027]

Materials Science

Materials Science, Multidisciplinary

WOS:000519825700004

AMER CHEMICAL SOC

20213510847794

Fluorescence ; Organic light emitting diodes (OLED) ; Semiconductor doping ; Spin orbit coupling

Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light, Optics and Optical Devices:741 ; Light/Optics:741.1

Web of Science

1.South China Univ Technol, State Key Lab Luminescent Mat & Devices, Key Lab Luminescence Mol Aggregates Guangdong Pro, Guangzhou 510640, Guangdong, Peoples R China
2.Shandong Normal Univ, Shandong Prov Key Lab Med Phys & Image Proc Techn, Inst Mat & Clean Energy, Sch Phys & Elect, Jinan 250014, Shandong, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Guangdong, Peoples R China
4.Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Clear Water Bay, Hong Kong, Peoples R China

Xu, Jingwen,Zhu, Xiangyu,Guo, Jingjing,et al. Aggregation-Induced Delayed Fluorescence Luminogens with Accelerated Reverse Intersystem Crossing for High-Performance OLEDs[J]. ACS Materials Letters,2019,1(6):613-619.

Xu, Jingwen.,Zhu, Xiangyu.,Guo, Jingjing.,Fan, Jianzhong.,Zeng, Jiajie.,...&Tang, Ben Zhong.(2019).Aggregation-Induced Delayed Fluorescence Luminogens with Accelerated Reverse Intersystem Crossing for High-Performance OLEDs.ACS Materials Letters,1(6),613-619.

Xu, Jingwen,et al."Aggregation-Induced Delayed Fluorescence Luminogens with Accelerated Reverse Intersystem Crossing for High-Performance OLEDs".ACS Materials Letters 1.6(2019):613-619.