Preparation and Research of Perovskite Quantum Dots Powder Based on RbCl Doped CsPbBr 3

Abstract Researchers have achieved precise control of the size of quantum dots by using the quantum confinement effect. Rb + and Cs + with similar ionic radii have become a new mechanism for researchers to regulate the emission wavelength of quantum dots. However, there are few studies on the performance of codoped quantum dots with ion at present. By adding a saturated solution of RbCl into an organic solution of CsPbBr 3 , quantum dots doped with Rb + and Cl − were prepared. The prepared quantum dots realized adjustable emission spectrum (457‐510 nm), stable lattice structure, and good stability under ultraviolet light irradiation. Therefore, double ion doping is a new method to prepare short‐wavelength of quantum dots.