Citation: Fuzheng Zhang, Chao Shi, Jiale Li, Fulin Jia, Xinyu Liu, Feiyang Li, Xinyu Bai, Qiuxia Li, Aihua Yuan, Guohua Xie. B-embedded narrowband pure near-infrared (NIR) phosphorescent iridium(Ⅲ) complexes and solution-processed OLED application[J]. Chinese Chemical Letters, ;2025, 36(1): 109596. doi: 10.1016/j.cclet.2024.109596 shu

B-embedded narrowband pure near-infrared (NIR) phosphorescent iridium(Ⅲ) complexes and solution-processed OLED application

Fuzheng Zhang ^a ,
Chao Shi ^{a, *,} ,
Jiale Li ^b ,
Fulin Jia ^a ,
Xinyu Liu ^a ,
Feiyang Li ^a ,
Xinyu Bai ^a ,
Qiuxia Li ^{a, *,} ,
Aihua Yuan ^a ,
Guohua Xie ^{b, *,}

a.
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
b.
The Institute of Flexible Electronics (Future Technologies), Xiamen University, Xiamen 361005, China

shichao@just.edu.cn

liqiuxia2019@just.edu.cn

ifeghxie@xmu.edu.cn

Received Date: 22 December 2023
Revised Date: 15 January 2024
Accepted Date: 29 January 2024
Available Online: 2 February 2024

Figures(4)

Pure near-infrared (NIR) phosphorescent materials with emission peak larger than 700 nm are of great significance for the development of optoelectronics and biomedicine. We have designed and synthesized two new B-embedded pure near-infrared (NIR)-emitting iridium complexes (Ir(Bpiq)₂acac and Ir(Bpiq)₂dpm) with peaks greater than 720 nm. More importantly, they exhibit very narrow phosphorescent emission with full width at half maximum (FWHM) of only about 50 nm (0.12 eV), resulting in a high NIR content (> 90%) in their spectrum. In view of better optical property and solubility, the complex Ir(Bpiq)₂dpm was used as the emitting layer of a solution-processed OLED device, and achieved good maximum external quantum efficiency (EQE) (2.8%) peaking at 728 nm. This research provides an important strategy for the design of narrowband NIR-emitting phosphorescent iridium complexes and their optoelectronic applications.
- Iridium complex,
- B-embedded,
- Near-Infrared,
- OLED,
- Phosphorescence
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