Citation: Shuli Wang, Xuemin Kong, Siting Cai, Yunshu Luo, Yuxuan Gu, Xiaotong Fan, Guolong Chen, Xiao Yang, Zhong Chen, Yue Lin. Solvent engineering in perovskite nanocrystal colloid inks for super-fine electrohydrodynamic inkjet printing of color conversion microstructures in micro-LED displays[J]. Chinese Chemical Letters, ;2025, 36(8): 110976. doi: 10.1016/j.cclet.2025.110976 shu

Solvent engineering in perovskite nanocrystal colloid inks for super-fine electrohydrodynamic inkjet printing of color conversion microstructures in micro-LED displays

Shuli Wang ^{a, 1} ,
Xuemin Kong ^{a, 1} ,
Siting Cai ^a ,
Yunshu Luo ^a ,
Yuxuan Gu ^a ,
Xiaotong Fan ^{a, c} ,
Guolong Chen ^a ,
Xiao Yang ^{a, b, *,} ,
Zhong Chen ^{a, d} ,
Yue Lin ^{a, d, *,}

a.
Fujian Engineering Research Center for Solid-State Lighting, Department of Electronic Science, School of Electronic Science and Engineering, Xiamen University, Xiamen 361102, China
b.
Department of Physics and Electronic Engineering, Jinzhong University, Jinzhong 030606, China
c.
College of Internet of Things Engineering, Wuxi Taihu University, Wuxi 214026, China
d.
Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361102, China

yangxiao951123@163.com

yue.lin@xmu.edu.cn

Received Date: 11 December 2024
Revised Date: 16 February 2025
Accepted Date: 18 February 2025
Available Online: 19 February 2025

Figures(6)

Super-fine electrohydrodynamic inkjet (SIJ) printing of perovskite nanocrystal (PNC) colloid ink exhibits significant potential in the fabrication of high-resolution color conversion microstructures arrays for full-color micro-LED displays. However, the impact of solvent on both the printing process and the morphology of SIJ-printed PNC color conversion microstructures remains underexplored. In this study, we prepared samples of CsPbBr₃ PNC colloid inks in various solvents and investigated the solvent’s impact on SIJ printed PNC microstructures. Our findings reveal that the boiling point of the solvent is crucial to the SIJ printing process of PNC colloid inks. Only does the boiling point of the solvent fall in the optimal range, the regular positioned, micron-scaled, conical PNC microstructures can be successfully printed. Below this optimal range, the ink is unable to be ejected from the nozzle; while above this range, irregular positioned microstructures with nanoscale height and coffee-ring-like morphology are produced. Based on these observations, high-resolution color conversion PNC microstructures were effectively prepared using SIJ printing of PNC colloid ink dispersed in dimethylbenzene solvent.
- Solvent,
- Perovskite nanocrystal,
- Electrohydrodynamic inkjet printing,
- Color conversion microstructures arrays,
- Micro-LED display
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