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Get Free AccessExploring blue organic light emitting diodes (OLED) is an important but challenging issue. Herein, to achieve blue-shifted emission, cyclohexane is fused to quinoxaline to weaken the electron-withdrawing ability and conjugation degree of the acceptor. As a result, blue to cyan fluorescent emitters of Me-DPA-TTPZ, tBu-DPA-TTPZ, and TPA-TTPZ were designed and synthesized with donors of diphenylamine and triphenylamine, which exhibit high photoluminescence quantum yields and good thermal stability. In OLEDs with emitters of TPA-TTPZ, the sensitized and nonsensitized devices demonstrate deep-blue (449 nm) and blue (468 nm) emission with maximum external quantum efficiency and CIE coordinates of 6.1%, (0.15, 0.10) and 5.1%, (0.17, 0.22), respectively, validating their potential as blue emitters in OLEDs.
Xiaoning Li, Liangjing Tu, Mingxue Gao, Aisen Li, Yi Chen, Weijie Chi, Dongdong Zhang, Lian Duan, Yujun Xie, Ben Zhong Tang, Zhen Li (2023). Highly Efficient Blue Organic Light Emitting Diodes Based on Cyclohexane-Fused Quinoxaline Acceptor. , 14(31), DOI: https://doi.org/10.1021/acs.jpclett.3c01629.
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Type
Article
Year
2023
Authors
11
Datasets
0
Total Files
0
Language
en
DOI
https://doi.org/10.1021/acs.jpclett.3c01629
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