Isomerization effect of triphenylamine-acridine derivatives on excited-state modification, photophysical property and electroluminescence performance
Isomerization effect of triphenylamine-acridine derivatives on excited-state modification, photophysical property and electroluminescence performance
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三苯胺吖啶衍生物异构化对激发态修饰、光物理性质和电致发光性能的影响
DOI：
10.1016/j.dyepig.2017.07.056
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发表时间：
2017-11
影响因子：
4.5
通讯作者：
Yang Bing
中科院分区：
文献类型：
--
作者：
Zhou Changjiang;Zhang Tingke;Zhang Shitong;Liu Haichao;Gao Yu;Su Qing;Wu Qiaolin;Li Weijun;Chen Jiangshan;Yang Bing
Charge-transfer (CT) state is becoming a useful excited state to design next-generation luminescence materials for high-performance organic light-emitting diode (OLED). However, strong CT state usually causes serious decrease in photoluminescence (PL) efficiency due to the small overlap between HOMO and LUMO. In order to harvest both high exciton utilization and high PL efficiency in fluorescent OLEDs, figuring out the strategy of fine modification of CT component in excited state through structural modulation is important. In this work, four donor–acceptor structure triphenylamine (TPA) - acridine (AC) isomers (TPA-9AC, TPA-1AC, TPA-2AC and TPA-3AC) were designed and synthesized to investigate structure-property relationship between isomerization effect and excited state properties. Density functional theory (DFT) calculations and solvatochromic absorption, emission and photoluminescence decay spectra are carried out for the deep understanding of their emissive state character. The four isomers exhibit gradually increased PL efficiency from low-polarity hexane to medium-polarity tetrahydrofuran (THF), which could be assigned to the formation of hybridized local and charge-transfer (HLCT) states and effectively suppressed non-radiative transition arised from acridine in medium-polarity solvents. Among four isomers, TPA-3AC achieved the best EL performance, due to the proper LE and CT compositions in the emissive state, demonstrating that isomerization of donor and acceptor functional moieties is an effective approach for structural modification for high-efficiency fluorescent OLED emitters.
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通过调节电荷转移态的能级来定制供体受体分子的激发态特性和电致发光性能
影响因子：
3.7
作者：
Yao Liang;Pan Yuyu;Tang Xiangyang;Bai Qing;Shen Fangzhong;Li Feng;Lu Ping;Yang Bing;Ma Yuguang
通讯作者：
Ma Yuguang
DOI：
10.5860/choice.35-5074
发表时间：
1970
期刊：
--
影响因子：
--
作者：
P. Atkins;R. Friedman
通讯作者：
P. Atkins;R. Friedman
影响因子：
4.9
作者：
Shitong Zhang;Weijun Li;Liang Yao;Yuyu Pan;F. Shen;Ran Xiao;Bing Yang;Yuguang Ma
通讯作者：
Shitong Zhang;Weijun Li;Liang Yao;Yuyu Pan;F. Shen;Ran Xiao;Bing Yang;Yuguang Ma
影响因子：
19
作者：
Li, Weijun;Pan, Yuyu;Ma, Yuguang
通讯作者：
Ma, Yuguang
影响因子：
0.4
作者：
Ramesh Kumar;Mandeep Kaur;M. Kumari
通讯作者：
Ramesh Kumar;Mandeep Kaur;M. Kumari