HALOGEN-PASSIVATED PEROVSKITE QUANTUM DOT, PREPARATION METHOD THEREFOR AND QLED DEVICE

摘要

A halogen-passivated perovskite quantum dot, a preparation method therefor, and a QLED device. The preparation method comprises steps of: adding a ligand having a deprotonating function into an inorganic perovskite quantum dot solution to carry out a ligand exchange reaction to obtain a first ligand-exchanged inorganic perovskite quantum dot solution (S10); and adding a polar organic halide into the first ligand-exchanged inorganic perovskite quantum dot solution to passivate the surfaces of inorganic perovskite quantum dots using halogen, and centrifuging to obtain halogen-passivated inorganic perovskite quantum dots (S20). The preparation method can effectively passivate the metal and non-metal elements on the surfaces of the inorganic perovskite quantum dots, thereby reducing the surface defects of the inorganic perovskite quantum dots, and thus improving the fluorescence intensity and charge transfer efficiency of the inorganic perovskite quantum dots.