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AssigneeNanjing University
InventorsYuanyuan WANG, Pengwei XIAO, Zhoufan ZHANG, Huanhuan LUO
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A photoresist-free optical patterning method for colloidal nanocrystals in a green solvent is provided. A photosensitive ligand structurally similar to the green solvent is introduced to successfully disperse nanocrystals in the green solvent and complete direct photolithography on the nanocrystals. Photosensitive nanocrystals obtained through ligand exchange can be effectively dispersed in the green solvent to absorb spectra emitted by the green solvent, thereby preserving about 90% of photoluminescence quantum yield (PLQY) while keeping the morphology and size unchanged. The present invention solves the problem that nanocrystals cannot be subject to direct photolithography in the green solvent, and is expected to be applied to the commercialization of nanocrystals in the field of electroluminescent and photoluminescent quantum dot displays.
A green photosensitive nanocrystal coating, comprising nanocrystals and a photosensitive ligand, wherein the photosensitive ligand contains a functional group that coordinates with the nanocrystals, and a methacryloyl or benzophenone photosensitive group, wherein the photosensitive ligand is one of ethyl 2-(3-mercaptopropionyloxy) methacrylate, 5-[3-methoxy-4-(2-methylprop-2-enoyloxy)phenyl]pent-4-enoic acid, (2E)-3-(3-methoxy-4-{2-[(2-methylprop-2-enoyl)oxy]ethoxy}phenyl)prop-2-enoic acid, 4-(4-(methacryloxy)phenoxy)-4-oxobutyric acid, mono-2-(methacryloxy)ethyl succinate, (E)-6-(4-(methacryloxy)phenyl)-4-oxyhex-5-enoic acid, (E)-6-(4-(methacryloxy)-3-methoxyphenyl)-4-oxohex-5-enoic acid, (E)-6-(4-(methacryloxy)-3,5-dimethoxyphenyl)-4-oxohex-5-enoic acid, 2-(6-(2-(methacryloxy)ethoxy)-2-oxo-2H-chromen-3-yl)acetic acid, phenyl-[4-(10-mercaptodecyloxy)phenyl]ketone, phenyl-[4-(10-mercaptodecylthio)phenyl]ketone, and 4-pyrrolidinyl-phenyl-[4-(10-mercaptodecylthio)phenyl]ketone.
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