Preparation method of quantum-dot thin film, light-emitting device and fabrication method of light-emitting device

Abstract

The invention discloses a preparation method of a quantum-dot thin film. The preparation method comprises the steps of uniformly dispersing quantum dots in an organic solvent to form a quantum dot solution; transferring the quantum dot solution to a mixed system of the organic solvent and water to form a quantum-dot colloid solution; providing a substrate with a pattern, and coating the quantum-dot colloid solution on the substrate; providing a substrate, and transferring the substrate coated with the quantum-dot colloid solution to the substrate; heating the substrate so that the quantum-dotcolloid solution moves towards a direction far away from the substrate, and forming a quantum-dot layered structure on a surface of the substrate; and removing the substrate to obtain the quantum-dotthin film. The invention also discloses a light-emitting device and a fabrication method thereof. The substrate is heated by a method of thermally-assisted self assembly, so that the quantum-dot colloid solution above the substrate is self-assembled to form the quantum-dot layered structure, the preparation process of the quantum-dot thin film is simplified, and meanwhile, the light-emitting efficiency of the quantum-dot thin film can be improved.

Description

technical field [0001] The invention relates to the technical field of quantum dot display, in particular to a preparation method of a quantum dot thin film, an electroluminescence device and a preparation method thereof. Background technique [0002] Quantum dots (quantumdots, QDs), as semiconductor materials for next-generation lighting and display devices, have unique optical properties, including wide excitation spectrum, narrow emission spectrum, high light color purity, high luminous quantum efficiency, adjustable luminous color, Long service life and other advantages; at the same time, the preparation process of quantum dots has the incomparable advantages of organic synthesis such as simple operation, low cost, and low toxicity. Therefore, the use of quantum dot materials in the field of liquid crystal display technology can greatly improve the color gamut of traditional liquid crystal displays and enhance the color reproduction ability of liquid crystal displays. A...

AI Technical Summary

Problems solved by technology

However, the method of quantum dot transfer printing is used to prepare quantum dot films. This method needs to add a process of stacking the sacrificial layer and a step of dissolving the sacrificial layer, which makes the process cumbersome and reduces the efficiency. In the process of dissolving the sacrificial layer , since the quantum dot layer also enters the solution, it will cause damage to the quantum dots and damage the performance of the quantum dot layer

[0005] There are some imperfections in the preparation methods of the above two quantum dot films. Therefore, it is urgent to develop a quantum dot film with simple preparation process and high luminous efficiency, so as to help the application of quantum dot film in quantum dot display.

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