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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

1 Scopus Citations
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Author(s)

  • Feng Huang
  • Xiao-Chun Fan
  • Ying-Chun Cheng
  • Hao Wu
  • Yi-Zhong Shi
  • Jia Yu
  • Kai Wang
  • Xiao-Hong Zhang

Detail(s)

Original languageEnglish
Pages (from-to)2226-2232
Journal / PublicationMaterials Horizons
Volume9
Issue number8
Online published16 Jun 2022
Publication statusPublished - 1 Aug 2022

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.

Citation Format(s)

Distinguishing the respective determining factors for spectral broadening and concentration quenching in multiple resonance type TADF emitter systems. / Huang, Feng; Fan, Xiao-Chun; Cheng, Ying-Chun; Wu, Hao; Shi, Yi-Zhong; Yu, Jia; Wang, Kai; Lee, Chun-Sing; Zhang, Xiao-Hong.

In: Materials Horizons, Vol. 9, No. 8, 01.08.2022, p. 2226-2232.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review