Indole-fused BN-heteroarenes as narrowband blue emitters for organic light-emitting diodes. Issue 7 (6th February 2023)

• Record Type: Journal Article
• Authors: Du, Cheng-Zhuo; Lv, Yang; Dai, Hengyi; Hong, Xiangchen; Zhou, Jianping; Li, Ji-Kun; Gao, Rong-Rong; Zhang, Dongdong; Duan, Lian; Wang, Xiao-Ye
• Is Part Of: Journal of materials chemistry. Volume 11:Issue 7(2023)
• Page Start: 2469
• Page End: 2474
• Publication Date: 2023-02-06
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2tc04952j
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters based on a novel indole-fused BN-heteroarene (InBN) are developed via a π-truncation strategy. Narrowband blue-emitting OLEDs are demonstrated with high EQEs of up to 16.8%. 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.