非对称双极性Ir(III)配合物磷光分子及其聚集诱导磷光和电致发光性能研究

doi:10.6023/cjoc202403052

研究论文

非对称双极性Ir(III)配合物磷光分子及其聚集诱导磷光和电致发光性能研究

陈姿仪^a, 刘思琪^a, 冯钊^a, 钟道昆^a, 杨晓龙^a, 孙源慧^a, 徐先彬^b, 冯震^b, 岳岭^a,*, 周桂江^a,*

^a西安交通大学化学学院陕西西安 710049;
^b陕西莱特光电材料有限公司陕西西安 710065

收稿日期:2024-03-30 修回日期:2024-05-22
基金资助:
国家自然科学基金(No. 52161145411, 21875179, 22175137, 21602170 及51803163)资助.

Unsymmetric Phosphorescent Ir(III) Complexes with Ambipolar Features and Investigation for Both Aggregation-Induced Phosphorescent Emission and Electroluminescent Properties

Ziyi Chen^a, Siqi Liu^a, Zhao Feng^a, Daokun Zhong^a, Xiaolong Yang^a, Yuanhui Sun^a, Xianbin Xu^a, Zhen Feng^a, Ling Yue^a,*, Guijiang Zhou^a,*

^aSchool of Chemistry, Xi'an Jiaotong University, Xi'an, 710049;
^bShaanxi Lighte Optoelectronics Material Co., Ltd. Xi'an, 710056

Received:2024-03-30 Revised:2024-05-22
Contact: * E-mail: heartstar@xjtu.edu.cn; zhougj@xjtu.edu.cn
Supported by:
the National Natural Science Foundation of China (No. 52161145411, 21875179, 22175137, 21602170 and 51803163).

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摘要/Abstract

同时以功能化的2-苯基吡啶(ppy)类配体和2-乙烯吡啶(vpy)类配体设计合成了两个非对称Ir(III)配合物磷光分子,并对其光电性能进行了详细表征. 光物理研究表明,这两个非对称Ir(III)配合物磷光分子具有两种发光激发态产生磷光发射,并且能够表现出明显的聚集诱导/增强磷光发光行为. 电化学研究结果表明功能基团的引入可使非对称Ir(III)配合物磷光分子表现出双极性. 此外,它们还能表现出较好的电致发光性能,电致发光器件启亮电压(V_turn-on)小于3 V,最大亮度为L_max为11380 cd•m^-2、最大外量子效率η_ext为5.3%、最大电流效率η_L为12.9 cd•A^-1及最大功率效率η_P为13.6 lm•W^-1. 相关研究结果为新型聚集诱导磷光电致发光材料的设计合成提供了有价值的参考.

关键词: 非对称结构, Ir(III)磷光配合物, 聚集诱导磷光, 双极性, 电致发光

Two unsymmetric Ir(III) phosphorescent complexes have been prepared with functionalized both 2-phenylpyridine(ppy)- and 2-vinylpyridine(vpy)-type ligands to investigate their optoelectronic properties. Photophysical results show that there are two kinds of radiative excited states contributing their phosphorescent emission. In addition, the unsymmetric Ir(III) phosphorescent complexes can exhibit aggregation-induced/enhanced phosphorescent emission behavior. Electrochemical results indicate that introducing functional group can confer ambipolar features to the unsymmetric Ir(III) phosphorescent complexes. In addition, they can show decent electroluminescent ability with turn-on voltage (V_turn-on) less than 3.0 V, maximum luminescence (L_max) of 11380 cd•m^-2, maximum external quantum efficiency (η_ext) of 5.3%, maximum current efficiency (η_L) of 12.9 cd•A^-1 and maximum power efficiency (η_P) of 13.6 lm•W^-1. All these results can provide valuable information for design and synthesis of new electroluminescent materials with aggregation-induced phosphorescent emission ability.

Key words: unsymmetric structure, Ir(III) phosphorescent complexes, aggregation-induced phosphorescent emission, ambipolar features, Electroluminescence

引用此文

陈姿仪, 刘思琪, 冯钊, 钟道昆, 杨晓龙, 孙源慧, 徐先彬, 冯震, 岳岭, 周桂江. 非对称双极性Ir(III)配合物磷光分子及其聚集诱导磷光和电致发光性能研究[J]. 有机化学, doi: 10.6023/cjoc202403052.

Ziyi Chen, Siqi Liu, Zhao Feng, Daokun Zhong, Xiaolong Yang, Yuanhui Sun, Xianbin Xu, Zhen Feng, Ling Yue, Guijiang Zhou. Unsymmetric Phosphorescent Ir(III) Complexes with Ambipolar Features and Investigation for Both Aggregation-Induced Phosphorescent Emission and Electroluminescent Properties[J]. Chinese Journal of Organic Chemistry, doi: 10.6023/cjoc202403052.

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