Issue 8, 2022

Distinguishing the respective determining factors for spectral broadening and concentration quenching in multiple resonance type TADF emitter systems

Abstract

Multiple resonance (MR) type thermally activated delayed fluorescence (TADF) emitters have attracted much recent attention due to their narrow emission spectra and high photoluminescence quantum yields (PLQYs). Spectral broadening and concentration quenching at high doping concentrations are two issues currently limiting the development of MR-TADF emitters. However, the origins of these have not been fully clarified so far. In this work, by investigating emitters with the same MR cores but peripheral groups of different steric types, we distinguished that the spectral broadening and concentration quenching are mainly caused by excimer formation and triplet exciton annihilation, respectively. This understanding on aggregated behaviors of MR emitters provides new insight for the further development of high-performance MR-TADF emitters with low concentration sensitivities.

Graphical abstract: Distinguishing the respective determining factors for spectral broadening and concentration quenching in multiple resonance type TADF emitter systems

Supplementary files

Article information

Article type
Communication
Submitted
26 4 2022
Accepted
15 6 2022
First published
16 6 2022

Mater. Horiz., 2022,9, 2226-2232

Distinguishing the respective determining factors for spectral broadening and concentration quenching in multiple resonance type TADF emitter systems

F. Huang, X. Fan, Y. Cheng, H. Wu, Y. Shi, J. Yu, K. Wang, C. Lee and X. Zhang, Mater. Horiz., 2022, 9, 2226 DOI: 10.1039/D2MH00511E

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