Quantum dot light-emitting layer and preparation method and application thereof

Abstract

The invention provides a quantum dot light-emitting layer and a preparation method and application thereof. The preparation method comprises the following steps of: (1) enabling a core quantum dot solution to react with a silane coupling agent to obtain an intermediate product, and enabling the intermediate product to react with an organic salt to obtain a charged core quantum dot deposition solution; (2) placing a substrate in the charged core quantum dot deposition solution obtained in the step (1) for electro-deposition to obtain a core quantum dot deposition substrate; and (3) subjecting the core quantum dot deposition substrate obtained in the step (2) to reaction to obtain the quantum dot light-emitting layer. The preparation method is simple in overall process and low in manufacturing cost; and the obtained quantum dot light-emitting layer can realize pixel-level quantum dot arrangement, has the advantages of high display resolution, high light conversion efficiency, high light-emitting efficiency and the like, and can realize batch production.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a quantum dot luminescent layer and a preparation method and application thereof. Background technique [0002] With the continuous development of display technology, people have higher and higher requirements for display quality of display devices. The particle size of quantum dot (Quantum Dot, QD) materials is generally between 1 and 10nm. Since electrons and holes are quantum-confined, the continuous energy band structure becomes a discrete energy level structure, so the luminescence spectrum is very narrow (20 ~30nm), high chroma purity, and wide display color gamut, which can greatly exceed the color gamut range of the National Television Standards Committee (NTSC); at the same time, the light absorption loss of quantum dot materials through color filters is small, which can Realize low power consumption display. Therefore, as a new generation of luminescent m...

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Problems solved by technology

CN102944943A discloses a quantum dot color filter, a liquid crystal panel and a display device, including a quantum dot material to form a color filter for a display, and the red light, or green light, or blue light filter is used to generate red light through optical excitation , or green light, or blue light quantum dot materials can improve the utilization rate of the backlight source and obtain higher purity color light, so the quantum dot display can achieve high color gamut and low power consumption of color display, but it does not affect quantum dots. The method of point layer graphics is explained

CN103226260A discloses a liquid crystal display screen, a display device and a method for patterning a quantum dot layer, and provides a method for dispersing quantum dots in a photoresist and patterning a quantum dot layer through a photolithography process, and the prepared quantum dot layer The dot layer replaces the existing color resin as a color filter to convert background light into monochromatic light, which has the advantages of high luminous efficiency, wide color gamut, and high color saturation; but quantum dots are dispersed in photoresist, due to photolithography There are various polymer materials such as initiators, polymer monomers, polymers, and additives in the glue. The surface chemical environment of quantum dots is complex, which greatly affects the luminous efficiency of quantum dots.

CN105355726A discloses a method for patterning a quantum dot layer and a method for preparing a quantum dot color film. A photoresist layer with a pattern structure is used as a shielding layer to etch a monochromatic quantum dot layer to obtain a patterned quantum dot layer. The method used can prepare fine quantum dot graphics, which greatly improves the display resolution of the graphic quantum dot layer; the quantum dot color film is prepared according to the above-mentioned quantum dot layer graphic method, and the prepared quantum dot color film has fine quantum dot color film. dot pattern, and the luminous efficiency of quantum dots is high, thereby effectively improving the resolution of the display device and the utilization rate of the backlight, but this method is complicated in process, high in production cost, requires high equipment capacity and precision, and is difficult to realize Pixel-level quantum dot arrangement

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