Quantum dot light-emitting diode capable of improving charge injection balance and preparation method thereof

Abstract

The invention discloses a quantum dot light-emitting diode capable of improving charge injection balance and a preparation method thereof. The present invention uses a composite material structure system composed of inorganic semiconductor materials and / or organic materials to prepare charge injection layers and / or charge transport layers and / or heterogeneous charge blocking layer material systems respectively, and adjust the inorganic semiconductor materials in each layer The ratio of materials and organic materials and the composition phase distribution state make the injection efficiency of electrons and holes injected into the quantum dot light-emitting layer consistent, the injected charge is equal, and the charge injection balance on the quantum dot light-emitting layer realizes the electrons and holes in the quantum dot light-emitting layer. The hole recombination efficiency is maximized, and the luminous efficiency of the quantum dot light-emitting diode is effectively improved.

Description

technical field [0001] The invention relates to the technical field of quantum dot light emitting diodes, in particular to a quantum dot light emitting diode capable of improving charge injection balance and a preparation method. Background technique [0002] Quantum dots can also be called semiconductor nanocrystals, which are nanocrystalline particles with a radius smaller than or close to the radius of the Bohr excitons. It is composed of a small number of atoms or atomic groups, and its particle size is generally between 1-20nm. The conduction band electrons, valence band holes, and excitons of quantum dots are bound in three spatial directions. Since the electrons and holes are quantum-confined, the continuous energy band structure becomes a discrete energy level structure with molecular characteristics. Fluorescence can be emitted after excitation, and quantum dots have unique luminescence characteristics, making them have broad application prospects in the field of o...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a quantum dot light-emitting diode and a preparation method that can improve the balance of charge injection, aiming at solving the inconsistency of the charge transmission efficiency of the existing quantum dot light-emitting diode, and the quantum dot light-emitting layer injecting charge Problems of imbalance and relatively low efficiency of quantum dot light-emitting diodes