Issue 24, 2020

Aggregation-state engineering and emission switching in D–A–D′ AIEgens featuring dual emission, MCL and white electroluminescence

Abstract

Thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP) have attracted much recent attention for their capabilities to utilize triplet excitons for emission. Herein, we demonstrate a strategy for switching between intermolecular TADF and RTP through rational structure modulation and crystal engineering with two newly designed organic AIEgens, namely (4-(9H-carbazol-9-yl)phenyl) (dibenzo[b,d]thiophen-2-yl)methanone (CTM) and (4-(3,6-di-tert-butyl-9H-carbazol-9-yl) phenyl) (dibenzo[b,d]thiophen-2-yl) methanone (tCTM). Both materials exhibit intramolecular TADF and intermolecular TADF/RTP dual emission in single crystals. High contrast mechanochromic luminescence (MCL) was unveiled due to the polymorphism of both emitters in aggregated states. Using these materials as emitters, we demonstrate for the first time, such dual TADF–TADF/RTP emissions can be exploited to obtain white light organic light-emitting diodes with high color rendering indexes.

Graphical abstract: Aggregation-state engineering and emission switching in D–A–D′ AIEgens featuring dual emission, MCL and white electroluminescence

Supplementary files

Article information

Article type
Paper
Submitted
07 Сәу. 2020
Accepted
07 Мам. 2020
First published
07 Мам. 2020

J. Mater. Chem. C, 2020,8, 8061-8068

Aggregation-state engineering and emission switching in D–A–D′ AIEgens featuring dual emission, MCL and white electroluminescence

J. Tan, W. Chen, S. Ni, Z. Qiu, Y. Zhan, Z. Yang, J. Xiong, C. Cao, Y. Huo and C. Lee, J. Mater. Chem. C, 2020, 8, 8061 DOI: 10.1039/D0TC01733G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements