Carbazole-2-carbonitrile as an acceptor in deep-blue thermally activated delayed fluorescence emitters for narrowing charge-transfer emissions

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

9 Scopus Citations
View graph of relations

Author(s)

  • Yi-Ting Lee
  • Masashi Mamada
  • Kenichi Goushi
  • Youichi Tsuchiya
  • Hajime Nakanotani
  • Chihaya Adachi

Detail(s)

Original languageEnglish
Pages (from-to)7821-7828
Number of pages8
Journal / PublicationChemical Science
Volume13
Issue number26
Online published8 Jun 2022
Publication statusPublished - 14 Jul 2022
Externally publishedYes

Link(s)

Abstract

This work reports a new acceptor for constructing donor-acceptor type (D-A type) blue thermally activated delayed fluorescence (TADF) emitters with narrowed charge-transfer (CT) emissions. A new acceptor core, carbazole-2-carbonitrile (CCN), is formed by the fusion of carbazole and benzonitrile. Three D-A type TADF emitters based on the CCN acceptor, namely 3CzCCN, 3MeCzCCN, and 3PhCzCCN, have been successfully synthesized and characterized. These emitters show deep-blue emissions from 439 to 457 nm with high photoluminescence quantum yields of up to 85% in degassed toluene solutions. Interestingly, all CCN-based deep-blue TADF emitters result in narrow CT emissions with full-width at half-maximums (FWHMs) of less than 50 nm in toluene solutions, which are pretty narrower compared with those of typical D-A type TADF emitters. Devices based on these emitters show high maximum external quantum efficiencies of up to 17.5%. © 2022 The Author(s). Published by the Royal Society of Chemistry

Research Area(s)

Citation Format(s)

Carbazole-2-carbonitrile as an acceptor in deep-blue thermally activated delayed fluorescence emitters for narrowing charge-transfer emissions. / Chan, Chin-Yiu; Lee, Yi-Ting; Mamada, Masashi et al.
In: Chemical Science, Vol. 13, No. 26, 14.07.2022, p. 7821-7828.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

Download Statistics

No data available