公开(公告)号：US20210367215A1

公开(公告)日：2021-11-25

申请号：US16627361

申请日：2019-11-26

申请人： SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.

发明人： Pei JIANG ,  Chiayu LEE ,  Chimche HSU ,  Shujhih CHEN ,  Miao DUAN ,  Yongming YIN ,  Yongwei WU ,  Bo HE

IPC分类号： H01L51/56 ,  C09K11/06 ,  H01L51/00 ,  H01L51/50

摘要： A method of preparing a film and a light-emitting device are disclosed. The method includes: providing at least one gas-phase source above a substrate, the at least one gas-phase source made of materials comprising a perovskite material; and controlling an evaporation rate of the at least one gas-phase source to form a perovskite film. In the method provided by the present invention, a perovskite light-emitting layer is prepared by gas-phase source evaporation coating without an organic solvent, which avoids miscibility between the organic solvent and other layers and improves compatibility between the perovskite material and other film materials, thereby realizing the low preparation cost and the simple preparation process.