公开(公告)号：US20230225146A1

公开(公告)日：2023-07-13

申请号：US17647709

申请日：2022-01-11

申请人： The University of Hong Kong

发明人： Jitae Kim ,  Mojun Chen

IPC分类号： H01L51/50 ,  C09D11/037 ,  C09D11/50 ,  C09K11/06 ,  C07F7/24 ,  H01L27/32 ,  H01L51/00 ,  H01L51/56

CPC分类号： H01L51/5032 ,  C09D11/037 ,  C09D11/50 ,  C09K11/06 ,  C07F7/24 ,  H01L27/3237 ,  H01L51/0004 ,  H01L51/0026 ,  H01L51/56 ,  C09K2211/10 ,  H01L51/0077 ,  B42D25/387

摘要： A method for preparing three-dimensional perovskite nanopixels of a digital display is provided. The method includes steps of preparing precursor ink by mixing methylammonium halide and lead halide and adding them into another mixture, adding the precursor ink into a nanopipette, placing the nanopipette with the precursor ink above a silicon substrate and apart from the silicon substrate by a certain distance, configuring the nanopipette to come into contact with the Si substrate such that a portion of the precursor ink having an interface surface of a shape of a meniscus is formed between the nanopipette and the silicon substrate, performing rapid evaporation of the portion of the precursor ink to facilitate crystallization of perovskite, moving the nanopipette upwardly at a constant speed such that the crystallization of perovskite proceeds upwardly, and terminating the crystallization of perovskite to generate a freestanding nanopixel for emitting light.