Abstract: Provided is a hybridized perovskite quantum dot material. The quantum dot material comprises a kernel and surface ligands. The kernel is formed by R1NH3AB3 or (R2NH3)2AB4, where R1 is methyl group, R2 is an organic molecular group, A is at least one selected from Ge, Sn, Pb, Sb, Bi, Cu and Mn, B is at least one selected from Cl, Br and I, A and B form a coordination octahedral structure, and R1NH3 or R2NH3 is filled in gaps of the coordination octahedral structure. The surface ligand is an organic acid or organic amine. The quantum dot material has a high fluorescence quantum yield.

Abstract: Related are a copper indium sulfide nanoparticle and a preparation method thereof. Copper salts, indium salts and alkane thiol are added to a non-polar organic solvent, and then are heated with stirring under inert gas atmosphere to dissolve until a dark red colloidal solution is obtained. The obtained colloidal solution is cooled to room temperature, and then a polar solvent is added. The copper indium sulfide semiconductor nanoparticles are obtained through centrifugal settling. The obtained copper indium sulfide semiconductor nanoparticles could be further washed and vacuum dried to give copper indium sulfide semiconductor nanoparticle powders. The obtained copper indium sulfide semiconductor nanoparticles have an average particle size of 2 to 10 nm and an emission spectrum of 600 to 800 nm in the near infrared region, quantum efficiency being close to 10%. The yield of the present method is up to 90%.