▎ 摘　　要

NOVELTY - Preparation of perovskite composite phosphor involves weighing cesium-lead halide (I) as raw material, adding the cesium-lead halide and a complex chosen from boron nitride, graphene, graphene oxide, silica, polyvinylpyrrolidinone, diatomite and metal-organic framework, to a ball mil, adding a surfactant chosen from oleylamine, oleic acid, n-octylamine and bis(dodecyldimethylammonium bromide), sealing the ball mill, and milling at 300-500 rpm for 2-24 hours. USE - Preparation of perovskite composite phosphor (claimed). ADVANTAGE - The method enables efficient preparation of perovskite composite phosphor with high yield and stability, by simple and economical process without requiring subsequent purification. DETAILED DESCRIPTION - Preparation of perovskite composite phosphor involves weighing cesium-lead halide of formula: CsPbXY'2 (I) as raw material, adding the cesium-lead halide and a complex chosen from boron nitride, graphene, graphene oxide, silica, polyvinylpyrrolidinone, diatomite and metal-organic framework, to a ball mil, adding a surfactant chosen from oleylamine, oleic acid, n-octylamine and bis(dodecyldimethylammonium bromide), sealing the ball mill, and milling at 300-500 rpm for 2-24 hours. X,Y'=Br, Cl or I.