Color film substrate, liquid crystal display screen and monochromatic quantum dot dispersion method

Abstract

The invention discloses a color film substrate, a liquid crystal display screen and a monochromatic quantum dot dispersion method. A laminated structure containing monochromatic quantum dots is arranged on a sub-pixel region of at least one color of each pixel on the color film substrate, and is formed by alternately laminating flaky graphite layers and monochromatic quantum dot layers; as the laminated structure containing the monochromatic quantum dots is used to replace current color resin and used as a colored filter, bias lighting is converted into monochromatic light; as an emission spectrum of the quantum dots is narrow and high in light efficiency, the bias lighting can be efficiently converted into the monochromatic light, the color gamut of the liquid crystal display screen can be improved, the color saturation can be enhanced, and the displaying quality of the display screen can be improved; moreover, the laminated structure is formed by alternately laminating the flaky graphite layers and the monochromatic quantum dot layers, so that the monochromatic quantum dots can be uniformly dispersed between adjacent flaky graphite layers, the accumulation of the monochromatic quantum dots can be prevented, the quantum productivity of the quantum dots is increased, and the excitation light efficiency of the quantum dots is improved.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a color filter substrate, a liquid crystal display, a display device and a method for dispersing monochrome quantum dots. Background technique [0002] Quantum Dots (QDs), also known as nanocrystals, are nanoparticles composed of II-VI or III-V elements. The particle size of quantum dots is generally between 1 and 20 nm. Since electrons and holes are quantum-confined, the continuous energy band structure becomes a discrete energy level structure, which can emit fluorescence after being excited. [0003] The emission spectrum of quantum dots can be controlled by changing the size of quantum dots. By changing the size of the quantum dot and its chemical composition, its emission spectrum can cover the entire visible light region. Taking CdTe quantum dots as an example, when its particle size grows from 2.5nm to 4.0nm, their emission wavelength can be red-shifted fr...

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Problems solved by technology

[0005] However, due to the poor dispersion of nano-scale quantum dots in organic solvents, the accumulation of quantum dots will cause quenching when patterning (Pattern) later, which seriously reduces the quantum yield. Therefore, in the prior art, No design that uses quantum dots inside LCD screens

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