Structurally Resemblant Dopants Enhance Organic Room-Temperature Phosphorescence

被引：61
作者：
Chong, Kok Chan [1 ]
Chen, Chengjian [1 ]
Zhou, Cheng [2 ]
Chen, Xiaojie [3 ]
Ma, Dongyu [3 ]
Bazan, Guillermo C. [2 ]
Chi, Zhenguo [3 ]
Liu, Bin [1 ]
机构：
[1] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore
[2] Natl Univ Singapore, Dept Chem, 3 Sci Dr 3, Singapore 117543, Singapore
[3] Sun Yat Sen Univ, Sch Chem, 135 Xingang West Rd, Guangzhou 510275, Guangdong, Peoples R China
来源：
ADVANCED MATERIALS | 2022年 / 34卷 / 29期
关键词：
charge transfer; excitons; organic molecules; phosphorescence; photonics;
D O I：
10.1002/adma.202201569
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Doping has shown very promising potential in endowing room-temperature phosphorescence (RTP) properties of organic phosphors with minimal effort. Here, a new isomer design and doping strategy is reported that is applicable to dibenzothiophene (DBT) and its derivatives. Three isomers are synthesized to study the dopant effect on enhancing RTP of DBT derivatives. It is found that isomer dopants bearing close resemblance to the host with matched highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels and small energy difference between singlet- and triplet-excited states can yield efficient RTP for the doped system. Meanwhile, phosphorescence color from yellow to red is achieved by varying isomer dopants used for doping the DBT derivatives. This work represents an RTP enhancement strategy based on isomer design and doping to construct luminescent organic phosphors.
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页数：7
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