聚集诱导延迟荧光材料及器件研究进展

Research Progress on Aggregation-Induced Delayed Fluorescence in Materials and Devices

热活化延迟荧光(TADF)材料无需贵金属参与即可实现单线态和三线态激子的全利用,成为了有机电致发光的研究热点.但是目前大部分TADF材料都表现出严重聚积诱导发光猝灭现象,这对其应用和发展不利.聚集诱导延迟荧光材料作为一种新型TADF材料,具有独特的聚集诱导荧光增强现象引起科研工作者极大兴趣.基于聚集诱导延迟荧光材料分子设计及其光物理性能和器件研究具有重要意义.将依据不同电子受体单元,对聚集诱导延迟荧光材料的发光原理、设计策略及其有机发光器件的最新进展进行简要综述,并对其发展做出展望.

Thermally activated delayed fluorescent (TADF) materials can fully harvest both singlet and triplet excitons for light emission,becoming a research hot topic in the field of organic electroluminescence.However,the majority of fluorescent materials often suffers from aggregation-caused quenching,which is unfavorable for their application and development.As a new type of TADF material,aggregation-induced delayed fluorescence (AIDF) material exhibits aggregation-induced fluorescence enhancement,which has drawn great interest of researchers.The molecular design of A IDF materials,its photophysical properties and device research are of great significance.In this review,the recent progress of the donor-acceptor type AIDF materials based on different electron acceptors is summarized.The light-emitting mechanism,design strategy as well as the latest developments of the of AIDF materials and organic light-emitting diodes are elaborated,and their prospects in the future are also forecasted.