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Thermally Activated Delayed Fluorescence Properties of Trioxoazatriangulene Derivatives Modified with Electron Donating Groups
Author(s) -
Tsuchiya Youichi,
Ishikawa Yuma,
Lee SangHoon,
Chen XianKai,
Brédas JeanLuc,
Nakanotani Hajime,
Adachi Chihaya
Publication year - 2021
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.202002174
Subject(s) - triphenylamine , diphenylamine , materials science , fluorescence , carbazole , photochemistry , oled , electron donor , electron , emission spectrum , acridine orange , analytical chemistry (journal) , optoelectronics , spectral line , optics , nanotechnology , organic chemistry , chemistry , physics , layer (electronics) , quantum mechanics , astronomy , metallurgy , catalysis , apoptosis , biochemistry
With the aim of achieving high‐performance thermally activated delayed fluorescence, a series of trioxoazatriangulene derivatives are systematically developed by modifying the donor substituents. The emission colors are shifted from green to greenish‐yellow and to yellow with rather broad spectral widths of 70–95 nm by introducing carbazole, triphenylamine, or diphenylamine donor units, indicating that each emission originates from a charge‐transfer transition. On the other hand, the trioxoazatriangulene modified with three diphenylamines shows orange emission with a narrow emission spectrum (45 nm), suggesting that the transition mainly originates from a multiple resonance effect.