Chiral electron transporting material for circularly polarized organic light-emitting diode  

作　　者：Peihao Huo Tianyu Yang Peiyu Fang Yujia Li Nanlong Zheng Min Gong Zuqiang Bian Zhiwei Liu 

机构地区：[1]Beijing National Laboratory for Molecular Sciences,State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China

出　　处：《Science China Chemistry》2024年第11期3777-3784,共8页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (92156016, U23A20593 and 22071003);the National Key R&D Program of China (2021YFB3500400, 2021YFB3501800 and 2022YFB3503700);the China Postdoctoral Science Foundation (2023TQ0004)。

摘　　要：Circularly polarized organic light-emitting diode(CP-OLED) has attracted increasing interest for its efficient ability to generate circularly polarized light directly. So far, many CP-OLEDs were successfully fabricated with chiral emitters or chiral hosts. In this study, a new strategy based on chiral electron transporting layer is proposed to construct CP-OLEDs. A pair of chiral electron transporting materials, 1,3,5-tris((R/S)-4-isopropyl-4,5-dihydrooxazol-2-yl)benzene((R/S)-TOx^(i)Pr), are firstly designed and synthesized. The crystalline films of(R/S)-TOx^(i)Pr show circularly polarized photoluminescence with photoluminescence dissymmetry factors of-0.067 and +0.041, respectively. The CP-OLEDs based on(R/S)-TOx^(i)Pr and three types of achiral emitters all exhibit circularly polarized electroluminescence, showing feasibility and strong versatility of this new strategy. The mechanism is attributed to in-situ electrical excitation instead of simply light filtering of non-circularly polarized light. This work demonstrates a new approach for realizing circularly polarized electroluminescence which may provide a valuable strategy to develop CP-OLEDs.

关 键 词：circularly polarized organic light-emitting diodes chiral electron transporting layer trisoxazolinylbenzene circularly polarized electroluminescence 

分 类 号：TN383.1[电子电信—物理电子学] TQ25[化学工程—有机化工] TB383.2[一般工业技术—材料科学与工程]