TY - JOUR
T1 - Controlling the electronic structures of triphenylene based sky blue TADF emitters by chemical modifications for high efficiency with shorter emission lifetimes
AU - Kumada, Kengo
AU - Sasabe, Hisahiro
AU - Nakao, Kohei
AU - Matsuya, Misaki
AU - Noda, Taito
AU - Arai, Hiroki
AU - Kido, Junji
N1 - Funding Information:
We gratefully acknowledge the partial financial support from the Center of Innovation (COI) Program of the Japan Science and Technology Agency (JST). HS acknowledges financial support in part by JSPS KAKENHI (17H03131, 20H02807) from the JSPS.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/5/1
Y1 - 2022/5/1
N2 - Chemically modified triphenylene derivatives are one of the attractive candidates as an acceptor unit for realizing efficient blue thermally activated delayed fluorescence (TADF) emitters due to the rigid structure and the high triplet energy of 2.9 eV however, only a limited number of examples with low external quantum efficiency (EQE) below 10% are reported to date. Here, we developed three types of blue TADF emitters based on modified triphenylene acceptor units. These emitters showed sky blue emission with the emission peak wavelength around 470 nm, high photoluminescent quantum yield (PLQY) of ∼88%, and a short delayed lifetime (τd) of ∼7.7 μs. These emitters realized efficient sky blue organic light-emitting device with high EQE of over 20%.
AB - Chemically modified triphenylene derivatives are one of the attractive candidates as an acceptor unit for realizing efficient blue thermally activated delayed fluorescence (TADF) emitters due to the rigid structure and the high triplet energy of 2.9 eV however, only a limited number of examples with low external quantum efficiency (EQE) below 10% are reported to date. Here, we developed three types of blue TADF emitters based on modified triphenylene acceptor units. These emitters showed sky blue emission with the emission peak wavelength around 470 nm, high photoluminescent quantum yield (PLQY) of ∼88%, and a short delayed lifetime (τd) of ∼7.7 μs. These emitters realized efficient sky blue organic light-emitting device with high EQE of over 20%.
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U2 - 10.1016/j.cej.2022.134925
DO - 10.1016/j.cej.2022.134925
M3 - Article
AN - SCOPUS:85123773052
SN - 1385-8947
VL - 435
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 134925
ER -