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Comparative study of thermally activated delayed fluorescent properties of donor-acceptor and donor-acceptor-donor architectures based on phenoxazine and dibenzo[a,j]phenazine.

ABSTRACT: A new thermally activated delayed fluorescence (TADF) compound based on a donor-acceptor (D-A) architecture (D = phenoxazine; A = dibenzo[a,j]phenazine) has been developed, and its photophysical properties were characterized. The D-A compound is applicable as an emitting material for efficient organic light-emitting diodes (OLEDs), and its external quantum efficiency (EQE) exceeds the theoretical maximum of those with prompt fluorescent emitters. Most importantly, comparative study of the D-A molecule and its D-A-D counterpart from the viewpoints of the experiments and theoretical calculations revealed the effect of the number of the electron donor on the thermally activated delayed fluorescent behavior.

SUBMITTER: Izumi S 

PROVIDER: S-EPMC9062652 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature

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Comparative study of thermally activated delayed fluorescent properties of donor-acceptor and donor-acceptor-donor architectures based on phenoxazine and dibenzo[<i>a,j</i>]phenazine.

Izumi Saika S   Govindharaj Prasannamani P   Drewniak Anna A   Crocomo Paola Zimmermann PZ   Minakata Satoshi S   de Sousa Leonardo Evaristo LE   de Silva Piotr P   Data Przemyslaw P   Takeda Youhei Y  

Beilstein journal of organic chemistry 20220425

A new thermally activated delayed fluorescence (TADF) compound based on a donor-acceptor (D-A) architecture (D = phenoxazine; A = dibenzo[<i>a,j</i>]phenazine) has been developed, and its photophysical properties were characterized. The D-A compound is applicable as an emitting material for efficient organic light-emitting diodes (OLEDs), and its external quantum efficiency (EQE) exceeds the theoretical maximum of those with prompt fluorescent emitters. Most importantly, comparative study of the  ...[more]

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