Citation: Jing Sun, Junsen Jia, Bo Zhao, Jingjing Yang, Manjeet Singh, Zhongfu An, Hua Wang, Bingshe Xu, Wei Huang. A purely organic D-π-A-π-D emitter with thermally activated delayed fluorescence and room temperature phosphorescence for near-white OLED[J]. Chinese Chemical Letters, ;2021, 32(4): 1367-1371. doi: 10.1016/j.cclet.2020.09.060 shu

A purely organic D-π-A-π-D emitter with thermally activated delayed fluorescence and room temperature phosphorescence for near-white OLED

Jing Sun ^{a, b} ,
Junsen Jia ^b ,
Bo Zhao ^b ,
Jingjing Yang ^b ,
Manjeet Singh ^c ,
Zhongfu An ^{c, *,} ,
Hua Wang ^{b, *,} ,
Bingshe Xu ^b ,
Wei Huang ^{a, *,}

a.
Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, Xi'an 710072, China
b.
Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, China
c.
Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing 211816, China

iamzfan@njtech.edu.cn

wanghua001@tyut.edu.cn

iamwhuang@njtech.edu.cn

Received Date: 5 August 2020
Revised Date: 22 September 2020
Accepted Date: 30 September 2020
Available Online: 1 October 2020

Figures(4)

A purely organic D-π-A-π-D type emitter showing thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) was designed and synthesized by utilizing the benzophenone as an acceptor and the N-phenyl-2-napthylamine as a donor moiety. It exhibits considerable TADF character in doped PMMA film and room temperature phosphorescence with a long lifetime of 74 ms at 466 nm in solid state. The devices with the configuration of ITO/Mo₂O₃ (4 nm)/mCP (30 nm)/mCP: x wt% NP2BP/TmTyPB (60 nm)/LiF (1.5 nm)/Al (100 nm) were prepared by vacuum evaporation to explore their electroluminescent performance. Interestingly, the non-doped device has obtained near-white emission with a fluorescence emission peak at 475 nm and a phosphorescence emission peak at 563 nm having the CIE coordinate of (0.23, 0.32) and the maximum external quantum efficiency of 1.09%.
- Thermally activated delayed fluorescence,
- Room temperature phosphorescence,
- White OLED,
- D-π-A-π-D architecture
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