Indole-fused BN-heteroarenes as narrowband blue emitters for organic light-emitting diodes

Cheng-Zhuo Du; Yang Lv; Hengyi Dai; Xiangchen Hong; Jianping Zhou; Ji-Kun Li; Rong-Rong Gao; Dongdong Zhang; Lian Duan; Xiao-Ye Wang

doi:10.1039/D2TC04952J

Indole-fused BN-heteroarenes as narrowband blue emitters for organic light-emitting diodes†

Cheng-Zhuo Du,‡^a Yang Lv,‡^a Hengyi Dai,^b Xiangchen Hong,^b Jianping Zhou,^b Ji-Kun Li,^a Rong-Rong Gao,^a Dongdong Zhang,*^b Lian Duan

^bc and Xiao-Ye Wang

*^ad

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* Corresponding authors

^a State Key Laboratory of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, China
E-mail: xiaoye.wang@nankai.edu.cn
Web: http://wang.nankai.edu.cn

^b Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, China
E-mail: ddzhang@mail.tsinghua.edu.cn

^c Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China

^d State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 510640 Guangzhou, China

Abstract

A new family of indole-fused multi-resonance thermally activated delayed fluorescence materials have been developed, which exhibit narrowband blue emission with a small full width at half maximum of 22–23 nm. High maximum external quantum efficiencies of up to 16.8% have been achieved in organic light-emitting diodes. Furthermore, it is unveiled that peripheral substitutions can not only promote device efficiency but also help to maintain narrowband emission under high dopant concentrations.

This article is part of the themed collection: Photofunctional Materials and Transformations

Journal of Materials Chemistry C

Indole-fused BN-heteroarenes as narrowband blue emitters for organic light-emitting diodes†

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Indole-fused BN-heteroarenes as narrowband blue emitters for organic light-emitting diodes

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