Axially chiral biphenoxazine-based thermally activated delayed fluorescence materials for solution-processed circularly polarized organic light-emitting diodes

Qu，Lang1; Xiao，Hui2,3; Zhang，Bao1; Yang，Qingping1; Song，Jintong1; Zhou，Xiangge1; Xu，Zong Xiang2; Xiang，Haifeng1

2023-09-01

10.1016/j.cej.2023.144709

Chemical Engineering Journal   Impact Factor & Quartile

1385-8947

1873-3212

Circularly polarized organic light-emitting diodes (CP-OLEDs) from pure organic thermally activated delayed fluorescence (TADF) materials are a research hotspot due to their low price and high electroluminescence efficiency for antiglare filters and 3D displays. Herein, one pair of intrinsically chiral octahydro-binaphthalenes-based biphenoxazine dyes were designed, prepared, and characterized. Bearing one axially chiral electron-donor (D) biphenoxazine core and two electron-acceptor (A) 2,4,6-triphenyl-s-triazineine fragments, they are tri-propeller-type, which would be in favour of both charge separation and A-D-D-A charge transfer to achieve aggregation-induced yellow-green TADF with a quantum yield of 25.2% and 57.6% for neat and doped film, respectively. Most importantly, they can be acted as emitters in solution processed CP-OLEDs to achieve luminance, current efficiency, external quantum efficiency, and dissymmetry factor up to 1.66 × 10 cd/m, 35.2 cd/A, 11.3% and 0.88 × 10, respectively. Moreover, the dissymmetry factor can be further enhanced to 1.69 × 10, if semitransparent electrodes are adopted.

Axial chirality Circularly polarized luminescence Organic light-emitting diodes Thermally activated delayed fluorescence

SCI

English

Others

National Natural Science Foundation of China[21871192] ; Major Program of Guangdong Basic and Applied Research[2019B030302009] ; Shenzhen-Hong Kong-Macau Science and Technology Plan C[SGDX20210823104205034]

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:001042681500001

ELSEVIER SCIENCE SA

ENGINEERING

2-s2.0-85165109109

Scopus

1.College of Chemistry,Sichuan University,Chengdu,610064,China
2.Department of Chemistry,Southern University of Science and Technology,Shenzhen,518000,China
3.Key Laboratory of Bioelectrochemistry and Environmental Analysis of Gansu Province,College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou,730070,China

Qu，Lang,Xiao，Hui,Zhang，Bao,et al. Axially chiral biphenoxazine-based thermally activated delayed fluorescence materials for solution-processed circularly polarized organic light-emitting diodes[J]. Chemical Engineering Journal,2023,471.

Qu，Lang.,Xiao，Hui.,Zhang，Bao.,Yang，Qingping.,Song，Jintong.,...&Xiang，Haifeng.(2023).Axially chiral biphenoxazine-based thermally activated delayed fluorescence materials for solution-processed circularly polarized organic light-emitting diodes.Chemical Engineering Journal,471.

Qu，Lang,et al."Axially chiral biphenoxazine-based thermally activated delayed fluorescence materials for solution-processed circularly polarized organic light-emitting diodes".Chemical Engineering Journal 471(2023).