Issue 46, 2022

Efficient thermally activated delayed fluorescent emitter based on a spiro-type benzo[b]acridine donor and a benzophenone acceptor

Abstract

A novel spiro-type donor 5H-spiro[benzo[b]acridine-12,9′-fluorene] (SPBAC) and a thermally activated delayed fluorescence (TADF) emitter bis(4-(5H-spiro[benzo[b]acridine-12,9′-fluoren]-5-yl)phenyl)methanone (2SPBAC-BP) were synthesized for a high efficiency organic light-emitting diode (OLED). The naphthalene moiety can introduce the local excited triplet (3LED) state into the 2SPBAC-BP molecule. 3LED can enhance the spin–orbit coupling (SOC) between the lowest triplet excited state (T1) and the lowest singlet excited state (S1), working as an intermediate between the two charge transfer states (3CT and 1CT) for efficient triplet exciton utilization. Using this strategy, a doped film of 20 wt% 2SPBAC-BP in the PPF host exhibits a high photoluminescence quantum yield of 72%, and the organic light-emitting diode (OLED) based on 2SPBAC-BP displays a high EQE of 26.4%, a current efficiency (CE) of 86.8 cd A−1, and a power efficiency (PE) of 85.2 lm W−1.

Graphical abstract: Efficient thermally activated delayed fluorescent emitter based on a spiro-type benzo[b]acridine donor and a benzophenone acceptor

Supplementary files

Article information

Article type
Paper
Submitted
13 Aug 2022
Accepted
01 Nov 2022
First published
01 Nov 2022

J. Mater. Chem. C, 2022,10, 17550-17556

Efficient thermally activated delayed fluorescent emitter based on a spiro-type benzo[b]acridine donor and a benzophenone acceptor

X. Song, Z. Liu, M. Lu, S. Zou, F. Guo, S. Gao, Z. Zhao, B. Z. Tang and Y. Zhang, J. Mater. Chem. C, 2022, 10, 17550 DOI: 10.1039/D2TC03421B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements