Graphene-loaded copper ion-doped blue-light perovskite nanocrystal dispersion liquid

The invention provides a graphene-loaded copper ion-doped blue-light perovskite nanocrystalline dispersion liquid, and particularly relates to the technical field of photoelectric conversion materials. The copper ion doped blue light perovskite nanocrystal has a chemical formula of CsPb < x > Cu < 1-x > Br < 3 >, wherein 0 < x < 1. According to the copper ion-doped blue-light perovskite nanocrystal provided by the invention, a divalent metal element Cu < 2 + > with small ion radius and strong bonding energy is introduced, so that the interaction between an A-site Cs atom and an X-site Br atom is enhanced, and the thermal stability of perovskite is improved. 本发明提供一种石墨烯负载的铜离子掺杂的蓝光钙钛矿纳米晶分散液，具体涉及光电转换材料技术领域。该铜离子掺杂的蓝光钙钛矿纳米晶，化学式为CsPbxCu1-xBr3；其中，0＜x＜1。本发明提供的铜离子掺杂的蓝光钙钛矿纳米晶，引入小离子半径具有强键合能的二价态金属元素Cu2+，增强A位Cs原子和X位Br原子的相互作用，提高了钙钛矿的热稳定性。