Preparation method of conductive and light transmittance perovskite quantum dot thin film

Abstract

The present invention discloses a preparation method of a conductive and light transmittance perovskite quantum dot thin film. The method comprises the steps of: preparation of a cavity plate with a surface array microstructure; preparation and coating of a hole transport layer; preparation and coating of a quantum dot reaction solution; imprinting of a quantum dot thin film; preparation and coating of an electron transfer layer; surface evaporation processing of the quantum dot thin film; and surface grinding processing of the quantum dot thin film. The preparation method of the conductive and light transmittance perovskite quantum dot thin film employs surface processing such as imprinting and metal evaporation to achieve preparation of the conductive thin film, employs surface grindingto achieve the light transmittance performance of the thin film; and the thin film can be light-transmitted and conductive, and the preparation method is high in efficiency, accurate in precision andlow in manufacturing low and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method for preparing a conductive and light-transmitting perovskite quantum dot film. Background technique [0002] With the rapid development of display technology, people's pursuit of display quality is getting higher and higher. Compared with traditional LEDs, quantum dots (QuantumDots), as a new type of fluorescent material, have the advantages of narrow emission spectrum, wide excitation spectrum, high quantum yield, and adjustable emission wavelength. They are widely used in lighting, solar cells and other fields. prospect. [0003] All-inorganic perovskite quantum dots (CsPbX 3 ,X=Cl,Br,I), has the advantages of simple synthesis method, energy saving and high efficiency, wide color gamut coverage, high color contrast, and good display quality. However, because perovskite quantum dots are easily affected by water and oxygen molecules in the air, Destroy its molecular ...

AI Technical Summary

Problems solved by technology

[0003] All-inorganic perovskite quantum dots (CsPbX 3 ,X=Cl,Br,I), has the advantages of simple synthesis method, energy saving and high efficiency, wide color gamut coverage, high color contrast, and good display quality. However, because perovskite quantum dots are easily affected by water and oxygen molecules in the air, Destroy its molecular structure, resulting in unstable performance and reduced service life

Another difficulty in quantum dot display technology is that it is difficult to form high-precision quantum dot arrays. At present, the main preparation methods of quantum dot arrays are electrical induction method, printing method, and laser processing method. These manufacturing methods have many defects.

The electric induction method and the printing method have high precision but high cost, and the laser processing method has high efficiency but poor precision

Difficult to achieve high-quality, high-volume production of quantum dot arrays

[0004] In addition, most of the existing quantum dot films are used as photoluminescent films, which require a backlight source, and most of the energy of the light source is lost due to heat generation, resulting in energy waste; while electroluminescence is achieved by directly electrifying the quantum dot film. To cause it to emit light, this requires that the quantum dot film has conductivity. At this stage, the main method of making the quantum dot film conductive is to add conductive particles to the film. Due to the uneven distribution of conductive particles, the conductive quantum dot film prepared by this method poor uniformity of light

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