期刊
NANO LETTERS
卷 21, 期 5, 页码 2288-2295出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c00134
关键词
perovskite nanocrystals; polymer ligands; photolithography; full-colored micropixels
类别
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2021R1A2C2006167]
- Creative Materials Discovery Program through NRF - MSIT [2018M3D1A1058536]
- National Research Foundation of Korea [2021R1A2C2006167] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, patternable perovskite nanocrystals with excellent stability were prepared by exchanging ligands, leading to successful demonstration of RGB microarrays with enhanced stability towards polar solvents. The results highlight the versatility and feasibility of a simplified patterning strategy for nanomaterials.
Micropatterns with a high stability, definition, and resolution are an absolute requirement in advanced display technology. Herein, patternable perovskite nanocrystals (PNCs) with excellent stability were prepared by exchanging pristine ligands with multifunctional polymer ligands, poly(2-cinnamoyloxyethyl methacrylate). The polymer backbone contains a cinnamoyl group that has been widely employed as a photo-cross-linker under 365 nm UV irradiation. Also, the terminal group is readily adjustable among NH3Cl, NH3Br, and NH3I, allowing us to obtain multicolored PNCs via instant anion exchange. Furthermore, the resulting ligand exchanged PNCs exhibited enhanced stability toward polar solvents without any undesirable influence on the structural or optical properties of the PNCs. Using anion exchanged PNCs, RGB microarrays with a subpixel size of 10 mu m x 40 mu m were successfully demonstrated. Our results highlight the versatility and feasibility of a simplified patterning strategy for nanomaterials, which can be generally applied in the fabrication of various optoelectronic devices.
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