Method for improving stability of quantum dot in base material and application

A quantum dot material and quantum dot technology, applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problem that the degree of photoluminescence stability of quantum dots is not significant, and achieve the effect of improving luminescence stability and service life

Inactive Publication Date: 2019-09-06
SHENZHEN PLANCK INNOVATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, in the prior art, there are still relatively few strategies on how to improve the stability of quantum dots in the substrate medium, and these strategies are not significant in improving the photoluminescence stability of quantum dots. Therefore, a new The method of improving the stability of quantum dots in the substrate is very meaningful

Method used

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  • Method for improving stability of quantum dot in base material and application
  • Method for improving stability of quantum dot in base material and application

Examples

Experimental program
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Effect test

Embodiment 1

[0043] This embodiment provides a kind of quantum dot glue, and its preparation method is:

[0044] Prepare 200 μL of green light CdSe / ZnS toluene solution with a concentration of 50 mg / mL, and remove the toluene solution with a vacuum pump to obtain viscous quantum dot colloidal microspheres, which are then mixed with acrylic and epoxy resin glue to make the quantum dots in the glue The mass fraction in the mixture is 10%, stirred, and vacuum defoamed to obtain the quantum dot glue, and finally glue is dispensed on the blue LED chip and cured by ultraviolet light irradiation.

Embodiment 2

[0046] This embodiment provides a kind of quantum dot glue, and its preparation method is:

[0047] Prepare 200 μL of CdSe / ZnS toluene solution with a concentration of 50 mg / mL, mix it with acrylic and epoxy resin glue, so that the mass fraction of quantum dots in the glue is 20%, stir, and then use a vacuum pump to remove the toluene solution to make CdSe / ZnS forms quantum dot colloidal microspheres in the glue, vacuum defoams to obtain the quantum dot glue, and finally glues on the blue LED chip and cures by ultraviolet light irradiation.

Embodiment 3

[0049] This embodiment provides a kind of quantum dot glue, and its preparation method is:

[0050] Prepare 200 μL of ZnSe chloroform solution with a concentration of 40 mg / mL, remove acetone at 60°C to obtain viscous quantum dot colloidal microspheres, and then mix with LED packaging glue so that the mass fraction of quantum dots in the glue is 20% , stirred, and ultrasonically degassed to obtain the quantum dot glue, and finally glue was dispensed and cured on the blue LED chip.

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Abstract

The invention relates to a method for improving stability of a quantum dot in a base material and application. The method is a method for enabling a quantum-dot material to be agglomerated in the basematerial to form a quantum-dot colloid micro-sphere. According to the method, a large agglomeration substance is formed by agglomerating the quantum dot in the base material, thus, the base materialis only contacted with the quantum dot of a surface layer of the agglomeration substance, and a surface ligand can be caused to fall off during the aging process (or a catalyst in colloid is used forcorroding the quantum dot to generate defect). While the base material and the internal quantum dot are isolated by the quantum dot (used as a sacrifice layer) of the surface layer, an effect of protecting the internal quantum dot is achieved, so that the light-emitting stability of the quantum dot in the base material is improved, and the service lifetime of the quantum dot in light-emitting application is further prolonged.

Description

technical field [0001] The invention belongs to the technical field of optical quantum materials, and relates to a method for improving the stability of quantum dots in a substrate and an application thereof. Background technique [0002] Quantum dot photoluminescence has a wide range of applications in the fields of TV, mobile phone backlight, LED lighting and infrared display. Quantum dots can meet the needs of display and lighting. Therefore, quantum dots need to be dispersed in glue, polymethyl methacrylate (PMMA), polystyrene and other media to dilute their concentration to meet the application standard. However, the media usually Containing a catalyst or a strong polar group, it will cause the surface layer ligands of the quantum dots to fall off, so that the working life of the quantum dots in photoluminescent applications will be reduced. For example, the commonly used glues are silica gels, acrylates and epoxies, and these glues contain groups with strong polarity,...

Claims

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Application Information

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IPC IPC(8): H01L33/50
CPCH01L33/501H01L33/505H01L2933/0041
Inventor 孙小卫王恺杨鸿成徐冰刘乙樽
Owner SHENZHEN PLANCK INNOVATION TECH CO LTD
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