Circularly polarized narrowband phosphorescent organic light-emitting diodes

被引：0
作者：
Wu, Shaohua [1 ,2 ]
Chen, Ping [2 ]
Xia, Xiaoyang [3 ]
Wang, Wenya [1 ]
Xie, Qifei [2 ]
Qi, Yanyu [1 ]
Han, Huabo [4 ]
Zhou, Liang [3 ]
Lu, Guangzhao [2 ]
机构：
[1] 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
[2] Shenzhen Inst Informat Technol, Shenzhen 518172, Peoples R China
[3] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China
[4] Shangqiu Normal Univ, Coll Chem & Chem Engn, Henan Key Lab Biomol Recognit & Sensing, Shangqiu 476000, Peoples R China
来源：
DALTON TRANSACTIONS | 2025年
基金：
中国国家自然科学基金;
关键词：
ACTIVATED DELAYED FLUORESCENCE; ELECTROLUMINESCENCE; LUMINESCENCE; POLYMER; COMPLEXES;
D O I：
10.1039/d5dt00337g
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
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.
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收藏
页码：5805 / 5811
页数：7
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