High-stability series blue light quantum dot LED and preparation process

Abstract

The invention discloses a high-stability series blue light quantum dot LED and a preparation process, and belongs to the technical field of quantum dot display. According to the technical scheme, the method comprises the following steps: synthesizing InP / ZnSe / ZnS quantum dots, purifying, and carrying out octyl mercaptan ligand exchange; and after the ITO substrate is processed, a multifunctional layer is sequentially spin-coated and annealed, and packaging is performed after an Al cathode is deposited. According to the process, by optimizing a quantum dot core-shell structure and a ligand exchange and series device structure, the LED emission wavelength is 469nm, the full width at half maximum is 24nm, and the external quantum efficiency is gt; 23%, and the brightness is gt; the compound has the advantages of high luminous efficiency, excellent stability and high color purity, and is suitable for the field of display.