TY - JOUR
T1 - Improved quantum yield of thermally activated delayed fluorescence by nanoconfinement in organophilic octosilicate
AU - Yamaguchi, Tetsuo
AU - Imwiset, Kamonnart Jaa
AU - Choi, Min Gyeong
AU - Oh, Jae Min
AU - Lee, Sae Youn
AU - Ogawa, Makoto
N1 - Publisher Copyright:
© 2023
PY - 2023/5
Y1 - 2023/5
N2 - A hybrid of a thermally activated delayed fluorescent dye (1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene, designated as 4CzIPN) and an organophilic layered silicate (dioleyldimethylammonium-octosilicate) was synthesized to achieve high photoluminescence quantum yield (0.71) of the dye, which is the critical factor in device application. Absorption, photoexcitation, and luminescence spectra suggested that the molecular conformation of 4CzIPN in the organophilic silicate enabled the utilization of the S0 → S1 transition efficiently. Furthermore, thanks to the flexible assembly of the dioleyldimethylammonium moieties, 4CzIPN was dispersed in the hybrid to suppress concentration quenching. Emission spectra and photoluminescence lifetimes in ambient and N2 atmosphere revealed that the photoluminescence quantum yield increased by the utilization of transition to a lower vibrational state and protection of a triplet state of 4CzIPN from oxygen in air in the organophilic silicate.
AB - A hybrid of a thermally activated delayed fluorescent dye (1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene, designated as 4CzIPN) and an organophilic layered silicate (dioleyldimethylammonium-octosilicate) was synthesized to achieve high photoluminescence quantum yield (0.71) of the dye, which is the critical factor in device application. Absorption, photoexcitation, and luminescence spectra suggested that the molecular conformation of 4CzIPN in the organophilic silicate enabled the utilization of the S0 → S1 transition efficiently. Furthermore, thanks to the flexible assembly of the dioleyldimethylammonium moieties, 4CzIPN was dispersed in the hybrid to suppress concentration quenching. Emission spectra and photoluminescence lifetimes in ambient and N2 atmosphere revealed that the photoluminescence quantum yield increased by the utilization of transition to a lower vibrational state and protection of a triplet state of 4CzIPN from oxygen in air in the organophilic silicate.
KW - Fluorescence lifetime
KW - Intercalation
KW - Layered silicates
KW - Thermally activated delayed fluorescence
UR - http://www.scopus.com/inward/record.url?scp=85149288566&partnerID=8YFLogxK
U2 - 10.1016/j.clay.2023.106882
DO - 10.1016/j.clay.2023.106882
M3 - Article
AN - SCOPUS:85149288566
SN - 0169-1317
VL - 236
JO - Applied Clay Science
JF - Applied Clay Science
M1 - 106882
ER -