Progress of Purely Organic Room-temperature Electrophosphorescent Materials and Devices

被引：0
|
作者：
Li M. [1 ]
Chen Z. [1 ]
Qiu W. [1 ]
Su S. [1 ]
机构：
[1] State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou
来源：
Faguang Xuebao/Chinese Journal of Luminescence | 2023年 / 44卷 / 01期
基金：
中国国家自然科学基金;
关键词：
electroluminescence; organic light-emitting diode; purely organic room-temperature phosphorescence material; triplet exciton;
D O I：
10.37188/CJL.20220300
中图分类号：
学科分类号：
摘要：
Purely organic room-temperature phosphorescence （RTP） materials have received extensive attention in the field of organic electroluminescence in recent years for the direct utilization of the 75% triplet excitons generated by electro-excitation. However， due to the theoretical spin-forbidden properties of purely organic materials， triplet excitons generally possess slow radiation rates and long exciton lifetimes， making it prone to non-radiative dissipation. Therefore， achieving enhanced spin-orbit coupling through efficient molecular design strategies is essential to promote fast intersystem crossing and phosphorescence radiation processes， thereby achieving high phosphorescence quantum efficiency and suppressing non-radiative deactivation of long-lived triplet excitons. In this article， based on the structural design principles of RTP materials， we reviewed recent progresses of purely organic RTP electroluminescence materials and devices， and summarized the application of RTP materials containing different non-metallic heavy atoms in electroluminescent devices. Also， we pointed out the key problems that need to be solved in the current research， and prospected the potential application of purely organic RTP materials in the field of electroluminescence. © 2023 Chines Academy of Sciences. All rights reserved.
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页码：90 / 100
页数：10
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