Solid perovskite quantum dot composite material and preparation method and application thereof

• Main Authors: ZHENG CE, LIU ZHIYUAN, XIONG GAOYANG, THE INVENTOR HAS WAIVED THE RIGHT TO BE MENTIONED
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2023
• Subjects: ADHESIVES; CHEMISTRY; DYES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NANOTECHNOLOGY; NATURAL RESINS; PAINTS; PERFORMING OPERATIONS; POLISHES; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING

The invention provides a solid perovskite quantum dot composite material and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing a lead source, a cesium source and a ligand in a solvent, and carrying out a reaction to obtain a perovskite quantum dot precursor solution; and (2) mixing the perovskite quantum dot precursor solution with a halogen atom-containing silane coupling agent, reacting, cooling, and hydrolyzing to obtain the solid perovskite quantum dot composite material. In the synthesis process of the solid perovskite quantum dot composite material, the silane coupling agent containing halogen atoms is added as a halogen source, so that the sufficient halogen source can be provided, and a stable polydentate ligand is formed to passivate halogen vacancy sites of perovskite quantum dots; and a halogen-rich environment can be formed around the solid perovskite quantum dots, so that the water stability of the solid perovskite quantum dots is i