Circularly polarized narrowband phosphorescent organic light-emitting diodes

作     者：Wu, Shaohua Chen, Ping Xia, Xiaoyang Wang, Wenya Xie, Qifei Qi, Yanyu Han, Huabo Zhou, Liang Lu, Guangzhao 

作者机构：Hebei Normal Univ Coll Chem & Mat Sci Hebei Engn Res Ctr Thin Film Solar Cell Mat & Devi Hebei Key Lab Organ Funct Mol Shijiazhuang 050024 Peoples R China Shenzhen Inst Informat Technol Shenzhen 518172 Peoples R China Chinese Acad Sci Changchun Inst Appl Chem State Key Lab Rare Earth Resource Utilizat Changchun 130022 Peoples R China Shangqiu Normal Univ Coll Chem & Chem Engn Henan Key Lab Biomol Recognit & Sensing Shangqiu 476000 Peoples R China 

出 版 物：《DALTON TRANSACTIONS》 (Dalton Trans.)

年 卷 期：2025年第54卷第14期

页      面：5805-5811页

核心收录：

学科分类：07[理学] 0703[理学-化学] 

基　　金：National Natural Science Foundation of China [52203231, 22005185, 22002092] National Natural Science Foundation of China [B2023005008] Postdoctoral Research Projects Merit-based Funding Programs of Hebei Province [JCYJ20220818095816036] Shenzhen Science and Technology Program Shenzhen University Stability Support Program Project [B2022205014] S&T Program of Hebei [BJK2023014] Science Research Project of Hebei Education Department [L2022B12] Science Foundations of Hebei Normal University 

主　　题：Camphor 

摘      要：Design strategies for chiral iridium(iii) complexes with stable circularly polarized luminescent properties have emerged as important research topics in the field of organic photonics. Given the high rigidity, low chemical activity and multi-closed-loop structure of R-camphor, its chirality cannot be easily affected. Furthermore, the introduction of indolo[3,2,1-jk]carbazole is beneficial for the narrow emission spectrum. Thus, two yellow-emission chiral iridium(iii) isomers, Delta-(mpincz)2Ir(R-camphor) and Lambda-(mpincz)2Ir(R-camphor), were designed and systematically investigated to elucidate their photophysical properties, chiroptical properties, electrochemical behaviors, theoretical calculations and electroluminescence. The maximum emission peak of racemic Delta/Lambda-(mpincz)2Ir(R-camphor) in a degassed toluene solution is located at 560 nm with a full width at half maximum (FWHM) of 48 nm, which demonstrated strong circularly polarized photoluminescence (CPPL) in toluene solution with a luminescent dissymmetry factor (gPL) of 1.15 x 10-3 and -1.0 x 10-3, respectively. Based on Delta-(mpincz)2Ir(R-camphor) and Lambda-(mpincz)2Ir(R-camphor), efficient organic light-emitting diodes (OLEDs) were fabricated via vacuum evaporation deposition, with maximum external quantum efficiency (EQEmax) values of 14.65% and 15.58% and asymmetry coefficients (gEL) of 1.86 x 10-4 and -2.29 x 10-4, respectively. This work may provide an effective strategy for the preparation of circularly polarized narrowband Ir(iii) complexes.