Electrogenerated chemiluminescence of donor-acceptor molecules with thermally activated delayed fluorescence

Ryoichi Ishimatsu; Shigeyuki Matsunami; Takashi Kasahara; Jun Mizuno; Tomohiko Edura; Chihaya Adachi; Koji Nakano; Toshihiko Imato

doi:10.1002/anie.201402615

Electrogenerated chemiluminescence of donor-acceptor molecules with thermally activated delayed fluorescence

Angew Chem Int Ed Engl. 2014 Jul 1;53(27):6993-6. doi: 10.1002/anie.201402615. Epub 2014 May 22.

Authors

Ryoichi Ishimatsu¹, Shigeyuki Matsunami, Takashi Kasahara, Jun Mizuno, Tomohiko Edura, Chihaya Adachi, Koji Nakano, Toshihiko Imato

Affiliation

¹ Department of Applied Chemistry, Graduate School of Engineering, Kyushu University (Japan). Ishimatsu@cstf.kyushu-u.ac.jp.

PMID: 24853608
DOI: 10.1002/anie.201402615

Abstract

The electrochemistry and electrogenerated chemiluminescence (ECL) of four kinds of electron donor-acceptor molecules exhibiting thermally activated delayed fluorescence (TADF) is presented. TADF molecules can harvest light energy from the lowest triplet state by spin up-conversion to the lowest singlet state because of small energy gap between these states. Intense green to red ECL is emitted from the TADF molecules by applying a square-wave voltage. Remarkably, it is shown that the efficiency of ECL from one of the TADF molecule could reach about 50%, which is comparable to its photoluminescence quantum yield.

Keywords: electrochemiluminescence; electrochemistry; kinetics; quantum yield; solvent effects.