Preparation method of quantum dot film

A quantum dot film and quantum dot technology, applied in the field of quantum dot film preparation, can solve problems such as limited thermal stability, achieve the effect of improving thermal stability and avoiding the reduction of fluorescence performance

Pending Publication Date: 2022-04-12
NINGBO DXC NEW MATERIAL TECH
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  • Claims
  • Application Information

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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

Method used

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Embodiment Construction

[0020] The present invention will be further described in detail below in combination with specific embodiments.

[0021] A method for preparing a quantum dot film, comprising the steps of:

[0022] S1: Prepare MOF materials (metal-organic framework materials). MOF materials are used to encapsulate quantum dots. Based on the properties of MOF materials, the above-mentioned purposes can be achieved by using various MOF materials. Therefore, MOF materials can be various in the prior art. A variety of MOF materials, for example, UiO-67, or UiO-66, MOF-5, or MOF-1, or MOF-74 can be used.

[0023] S2: Add the reaction amount of cesium source and oleic acid to the solvent octadecene, under the protection of an inert atmosphere, heat and magnetically stir until fully reacted to obtain a cesium oleate precursor solution. In this example, the cesium source uses CsCO 3 .

[0024] S3: The reaction amount of MOF material, PbX 2 , oleic acid, and oleylamine were added to the solvent oct...

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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 ...

Claims

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Application Information

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IPC IPC(8): C09K11/66C09K11/02C09K11/06
Inventor 罗培栋罗秋萍白倩倩
Owner NINGBO DXC NEW MATERIAL TECH
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