期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 50, 页码 60269-60278出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c17707
关键词
donor-acceptor systems; charge transfer; through space; thermally activated delayed fluorescence; OLEDs
资金
- National Natural Science Foundation of China [51773074]
- Natural Science Foundation of Hubei Province [2020CFB762]
- Program of Introducing Talents of Discipline to Universities of China [B17019]
In this study, a fixing acceptor design was used to develop a series of efficient TSCT TADF emitters, exhibiting excellent performance in doped films. The research confirmed the significance of cofacial conformation and TSCT in these emitters.
Through-space charge-transfer (TSCT) emitters have been extensively explored for thermally activated delayed fluorescence (TADF), but arranging various donors and acceptors into rigid cofacial conformations for various efficient TSCT TADF emitters has remained challenging. Here, we report a fixing acceptor design to reach various efficient TSCT TADF emitters. By chemically fixing the acceptor (benzophenone) with a rigid spiro-structure and cofacially aligning various donors with the fixed acceptor, a series of efficient TSCT TADF emitters have been developed. Single-crystal structures and theoretical calculations have verified closely packed cofacial donor/acceptor conformations and favorable TSCT in the emitters. In doped films, the emitters afford sky blue to yellow TADF emission, with high photoluminescence efficiencies up to 0.92 and reverse intersystem crossing rates up to 1.0 x 10(6) s(-1). Organic light-emitting diodes using the emitters afford sky blue to yellow electroluminescence with high external quantum efficiencies up to 20.9%. The work opens a new avenue toward a wide variety of efficient TSCT TADF emitters.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据