Preparation method of quantum dot film

Abstract

The preparation method of the quantum dot film comprises the following steps: S1, preparing an MOF material; s2, adding a reaction amount of a cesium source and oleic acid into a solvent octadecene, and under the protection of an inert atmosphere, heating and magnetically stirring until full reaction to prepare a cesium oleate precursor solution; s3, adding a reaction amount of the MOF material, PbX2, oleic acid and oleylamine into a solvent octadecene to prepare a CsPbX3-coated MOF quantum dot composite material; wherein X is Br and I; s4, mixing the CsPbBr3 (at) MOF and CsPbI3 (at) MOF quantum dot composite material with matrix resin, scattering particles, an initiator and a diluent to prepare quantum dot glue; s5, coating the quantum dot glue prepared in the step S4 through a slit, respectively laminating the quantum dot glue with a brightness enhancement film and a PET polyester film, and curing the middle quantum dot layer under the action of illumination to prepare a quantum dot film; according to the invention, the quantum dots are packaged in the MOF material with excellent luminescence characteristic, high stability and ultrahigh porosity, so that the thermal stability of the quantum dots is greatly improved.

Description

technical field [0001] The invention relates to a preparation method of a quantum dot film. Background technique [0002] Quantum dot TV (QLED) has shown great development potential in multiple dimensions such as ultra-high color gamut, color reproduction and color purity, mainly relying on the quantum dot film in its backlight module. Quantum dot film is a film that uses quantum dot materials with unique photoelectric characteristics as light conversion materials. When the quantum dots contained in it are stimulated by electricity or light, they will emit high-quality red / green with concentrated energy spectrum and very pure quality. Monochromatic light is then mixed with blue light to form high-quality white light. This special nanotechnology achieves high color gamut coverage of the display and restores colors. QLED color gamut coverage can reach 157%, much higher than LCD and OLED, and can achieve 1.07 billion color performances. At present, quantum dot materials used ...

AI Technical Summary

Problems solved by technology

The dense polymer layer covering perovskite quantum dots can endow them with excellent water resistance, and the polymer matrix with carboxyl or amine groups can passivate their surface and improve the performance of quantum dot materials, but in improving their thermal stability properties are still limited, a situation similar to that of core-only CdSe quantum dots