TY - JOUR
T1 - Hypsochromic Shift of Multiple-Resonance-Induced Thermally Activated Delayed Fluorescence by Oxygen Atom Incorporation
AU - Tanaka, Hiroyuki
AU - Oda, Susumu
AU - Ricci, Gaetano
AU - Gotoh, Hajime
AU - Tabata, Keita
AU - Kawasumi, Ryosuke
AU - Beljonne, David
AU - Olivier, Yoann
AU - Hatakeyama, Takuji
N1 - Funding Information:
This study was supported by Grant-in-Aid for Scientific Research (18H02051, 21H02019), Early-Career Scientists (20K15291), and Transformative Research Areas (Condensed Conjugation, 20H05863) from JSPS, CREST (JPMJCR18R3) programs from JST, the Asahi Glass Foundation, and the Nagase Science and Technology Foundation. The authors are grateful to H. Nishi, K. Yoshiura (Kwansei Gakuin University), Y. Kondo. Dr. T. Matsushita, Dr. K. Okumura, Dr. Y. Sasada, and Dr. M. Kondo (JNC Petrochemical Co.) for their support and valuable input. Computational resources were provided by the “Consortium des'Equipements de Calcul Intensif” (CÉCI), funded by the “Fonds de la Recherche Scientifiques de Belgique” (FRS-FNRS) under Grant No. 2.5020.11, as well as the Tier-1 supercomputer of the Fédération Wallonie-Bruxelles, infrastructure funded by the Walloon Region under Grant Agreement n1117545, and FRS-FNRS. Y.O. acknowledges funding from the FRS-FNRS under the grant F.4534.21 (MIS-IMAGINE). G.R. acknowledges a grant from the “Fonds pour la formation a la Recherche dans l'Industrie et dans l'Agriculture” (FRIA) of the FRS-FNRS.
Funding Information:
This study was supported by Grant‐in‐Aid for Scientific Research (18H02051, 21H02019), Early‐Career Scientists (20K15291), and Transformative Research Areas (Condensed Conjugation, 20H05863) from JSPS, CREST (JPMJCR18R3) programs from JST, the Asahi Glass Foundation, and the Nagase Science and Technology Foundation. The authors are grateful to H. Nishi, K. Yoshiura (Kwansei Gakuin University), Y. Kondo. Dr. T. Matsushita, Dr. K. Okumura, Dr. Y. Sasada, and Dr. M. Kondo (JNC Petrochemical Co.) for their support and valuable input. Computational resources were provided by the “Consortium des'Equipements de Calcul Intensif” (CÉCI), funded by the “Fonds de la Recherche Scientifiques de Belgique” (FRS‐FNRS) under Grant No. 2.5020.11, as well as the Tier‐1 supercomputer of the Fédération Wallonie‐Bruxelles, infrastructure funded by the Walloon Region under Grant Agreement n1117545, and FRS‐FNRS. Y.O. acknowledges funding from the FRS‐FNRS under the grant F.4534.21 (MIS‐IMAGINE). G.R. acknowledges a grant from the “Fonds pour la formation a la Recherche dans l'Industrie et dans l'Agriculture” (FRIA) of the FRS‐FNRS.
Publisher Copyright:
© 2021 Wiley-VCH GmbH
PY - 2021/8/9
Y1 - 2021/8/9
N2 - Herein, we reported an ultrapure blue multiple-resonance-induced thermally activated delayed fluorescence (MR-TADF) material (ν-DABNA-O-Me) with a high photoluminescence quantum yield and a large rate constant for reverse intersystem crossing. Because of restricted π-conjugation of the HOMO rather than the LUMO induced by oxygen atom incorporation, ν-DABNA-O-Me shows a hypsochromic shift compared to the parent MR-TADF material (ν-DABNA). An organic light-emitting diode based on this material exhibits an emission at 465 nm, with a small full-width at half-maximum of 23 nm and Commission Internationale de l'Eclairage coordinates of (0.13, 0.10), and a high maximum external quantum efficiency of 29.5 %. Moreover, ν-DABNA-O-Me facilitates a drastically improved efficiency roll-off and a device lifetime compared to ν-DABNA, which demonstrates significant potential of the oxygen atom incorporation strategy.
AB - Herein, we reported an ultrapure blue multiple-resonance-induced thermally activated delayed fluorescence (MR-TADF) material (ν-DABNA-O-Me) with a high photoluminescence quantum yield and a large rate constant for reverse intersystem crossing. Because of restricted π-conjugation of the HOMO rather than the LUMO induced by oxygen atom incorporation, ν-DABNA-O-Me shows a hypsochromic shift compared to the parent MR-TADF material (ν-DABNA). An organic light-emitting diode based on this material exhibits an emission at 465 nm, with a small full-width at half-maximum of 23 nm and Commission Internationale de l'Eclairage coordinates of (0.13, 0.10), and a high maximum external quantum efficiency of 29.5 %. Moreover, ν-DABNA-O-Me facilitates a drastically improved efficiency roll-off and a device lifetime compared to ν-DABNA, which demonstrates significant potential of the oxygen atom incorporation strategy.
KW - deep blue
KW - multiple resonance effect
KW - narrowband emission
KW - organic light-emitting diodes
KW - thermally activated delayed fluorescence
UR - http://www.scopus.com/inward/record.url?scp=85109088880&partnerID=8YFLogxK
U2 - 10.1002/anie.202105032
DO - 10.1002/anie.202105032
M3 - Article
C2 - 34038618
AN - SCOPUS:85109088880
SN - 1433-7851
VL - 60
SP - 17910
EP - 17914
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 33
ER -