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

Research output: Contribution to journalArticle

62 Citations (Scopus)

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. Donor-acceptor molecules with thermally activated delayed fluorescence (TADF) at room temperature can emit efficient electrogenerated chemiluminescence (ECL). Efficient spin up-conversion from triplet to singlet excited states through thermal activation is required to break through the theoretical limitation according to spin statistics (25 % of the quantum yield of photoluminescence). The ECL efficiency one TADF molecule reached about 50 %.

Original languageEnglish
Pages (from-to)6993-6996
Number of pages4
JournalAngewandte Chemie - International Edition
Volume53
Issue number27
DOIs
Publication statusPublished - 2014 Jul 1

Fingerprint

Chemiluminescence
Fluorescence
Molecules
Quantum yield
Photoluminescence
Electrochemistry
Excited states
Energy gap
Chemical activation
Statistics
Electrons
Electric potential

Keywords

  • electrochemiluminescence
  • electrochemistry
  • kinetics
  • quantum yield
  • solvent effects

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis

Cite this

Electrogenerated chemiluminescence of donor-acceptor molecules with thermally activated delayed fluorescence. / Ishimatsu, Ryoichi; Matsunami, Shigeyuki; Kasahara, Takashi; Mizuno, Jun; Edura, Tomohiko; Adachi, Chihaya; Nakano, Koji; Imato, Toshihiko.

In: Angewandte Chemie - International Edition, Vol. 53, No. 27, 01.07.2014, p. 6993-6996.

Research output: Contribution to journalArticle

Ishimatsu, Ryoichi ; Matsunami, Shigeyuki ; Kasahara, Takashi ; Mizuno, Jun ; Edura, Tomohiko ; Adachi, Chihaya ; Nakano, Koji ; Imato, Toshihiko. / Electrogenerated chemiluminescence of donor-acceptor molecules with thermally activated delayed fluorescence. In: Angewandte Chemie - International Edition. 2014 ; Vol. 53, No. 27. pp. 6993-6996.
@article{75d4d7082cfc42fd8758a914a13534c9,
title = "Electrogenerated chemiluminescence of donor-acceptor molecules with thermally activated delayed fluorescence",
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. Donor-acceptor molecules with thermally activated delayed fluorescence (TADF) at room temperature can emit efficient electrogenerated chemiluminescence (ECL). Efficient spin up-conversion from triplet to singlet excited states through thermal activation is required to break through the theoretical limitation according to spin statistics (25 {\%} of the quantum yield of photoluminescence). The ECL efficiency one TADF molecule reached about 50 {\%}.",
keywords = "electrochemiluminescence, electrochemistry, kinetics, quantum yield, solvent effects",
author = "Ryoichi Ishimatsu and Shigeyuki Matsunami and Takashi Kasahara and Jun Mizuno and Tomohiko Edura and Chihaya Adachi and Koji Nakano and Toshihiko Imato",
year = "2014",
month = "7",
day = "1",
doi = "10.1002/anie.201402615",
language = "English",
volume = "53",
pages = "6993--6996",
journal = "Angewandte Chemie - International Edition",
issn = "1433-7851",
publisher = "John Wiley and Sons Ltd",
number = "27",

}

TY - JOUR

T1 - Electrogenerated chemiluminescence of donor-acceptor molecules with thermally activated delayed fluorescence

AU - Ishimatsu, Ryoichi

AU - Matsunami, Shigeyuki

AU - Kasahara, Takashi

AU - Mizuno, Jun

AU - Edura, Tomohiko

AU - Adachi, Chihaya

AU - Nakano, Koji

AU - Imato, Toshihiko

PY - 2014/7/1

Y1 - 2014/7/1

N2 - 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. Donor-acceptor molecules with thermally activated delayed fluorescence (TADF) at room temperature can emit efficient electrogenerated chemiluminescence (ECL). Efficient spin up-conversion from triplet to singlet excited states through thermal activation is required to break through the theoretical limitation according to spin statistics (25 % of the quantum yield of photoluminescence). The ECL efficiency one TADF molecule reached about 50 %.

AB - 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. Donor-acceptor molecules with thermally activated delayed fluorescence (TADF) at room temperature can emit efficient electrogenerated chemiluminescence (ECL). Efficient spin up-conversion from triplet to singlet excited states through thermal activation is required to break through the theoretical limitation according to spin statistics (25 % of the quantum yield of photoluminescence). The ECL efficiency one TADF molecule reached about 50 %.

KW - electrochemiluminescence

KW - electrochemistry

KW - kinetics

KW - quantum yield

KW - solvent effects

UR - http://www.scopus.com/inward/record.url?scp=84903125145&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84903125145&partnerID=8YFLogxK

U2 - 10.1002/anie.201402615

DO - 10.1002/anie.201402615

M3 - Article

VL - 53

SP - 6993

EP - 6996

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

SN - 1433-7851

IS - 27

ER -