Issue 3, 2023

Facile dimerization strategy for producing narrowband green multi-resonance delayed fluorescence emitters

Abstract

Establishing a simple molecular design strategy for enabling redshifted emissions while maintaining high color purity in multi-resonance thermally activated delayed fluorescence (MR-TADF) remains a crucial yet challenging task. Herein, we introduce a new design concept based on a dimerization strategy for constructing pure green MR-TADF emitters. Two isomeric MR dimers, namely p-CzB and m-CzB, were developed by tethering two MR fragments through different linking positions. The interconnection mode between the two MR fragments in these dimeric MR-TADF systems plays a vital role in regulating photophysical properties as well as exciton dynamics. Comprehensive photophysical and computational studies revealed that m-CzB exhibits superior green MR-TADF characteristics compared to p-CzB. A m-CzB-based organic light-emitting diode (OLED) delivered pure green electroluminescence with CIE coordinates of (0.20, 0.70), a maximum external quantum efficiency of 23.5%, and alleviated efficiency roll-off.

Graphical abstract: Facile dimerization strategy for producing narrowband green multi-resonance delayed fluorescence emitters

Supplementary files

Article information

Article type
Paper
Submitted
19 10月 2022
Accepted
29 11月 2022
First published
30 11月 2022

J. Mater. Chem. C, 2023,11, 917-922

Author version available

Facile dimerization strategy for producing narrowband green multi-resonance delayed fluorescence emitters

M. Yang, R. K. Konidena, S. Shikita and T. Yasuda, J. Mater. Chem. C, 2023, 11, 917 DOI: 10.1039/D2TC04447A

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