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Preparation method and application of composite material

A composite material and packaging method technology, which is applied in the fields of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc. question

Active Publication Date: 2020-10-23
ZHIJING NANOTECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, perovskite quantum dots are greatly affected by the environment and have poor stability. Factors such as air and water can cause the luminous efficiency of perovskite quantum dots to decrease or even completely quenched.
In addition, there is an anion exchange effect in perovskite, which may limit its application in multi-color light-emitting display.

Method used

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  • Preparation method and application of composite material
  • Preparation method and application of composite material
  • Preparation method and application of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0159] The polymer polystyrene (PS) and PbBr 2 Powder and MABr (MA refers to methylamine) powder are mixed, and the control mass ratio is: Polymer: (PbBr 2 +MABr)=100:5, control drug MABr:PbBr 2 The molar ratio is: 1:1. Mix the powder evenly with mechanical agitation. Then extrude at a temperature of 190°C at the feed inlet section, at a temperature of 210°C at the melting section, for 6 minutes, at a temperature of 220°C at the mixing section, for 30 minutes, at a temperature of 190°C at the mold forming section, and at a speed of 1000 rpm. Get MAPbBr 3Quantum dot / PS composite diffusion plate. The sample has a thickness of 1.5 mm. The fluorescence emission spectrum of the sample is as figure 1 shown, from figure 1 It can be seen that the emission wavelength is located at 516nm, and the half-maximum width is 22nm.

Embodiment 2

[0161] The polymer polystyrene (PS) and the experimental drug PbCl 2 Powder and CsCl powder are mixed, and the control mass ratio is: Polymer: (PbCl 2 +CsCl)=100:1, control drug CsCl:PbCl 2 The molar ratio is: 1:1.1. Mix the powder evenly with mechanical agitation. Then extrude at a temperature of 190°C at the feed inlet section, at a temperature of 210°C at the melting section, for 8 minutes, at a temperature of 220°C at the mixing section, for 40 minutes, at a temperature of 190°C at the mold forming section, and at a speed of 1000 rpm. Get CsPbCl 3 Quantum dot / PS composite diffusion plate. The sample had a thickness of 1.25 mm. The fluorescence emission spectrum of the sample is as figure 2 shown, from figure 2 It can be seen that the emission wavelength is at 405nm, and the half-maximum width is 19nm.

Embodiment 3

[0163] The polymer polystyrene (PS) and the experimental drug PbI 2 Powder and MAI powder are mixed, and the control mass ratio is: Polymer: (PbI 2 +MAI)=100:0.1, control drug MAI:PbI 2 The molar ratio is: 1:1.2. Mix the powder evenly with mechanical agitation. Then extrude at a temperature of 195°C at the feed inlet section, at a temperature of 210°C at the melting section, for 10 minutes, at a temperature of 220°C at the mixing section, for 20 minutes, at a temperature of 190°C at the mold forming section, and at a speed of 1000 rpm. Get-CsPbI 3 Quantum dot / PS composite diffusion plate. The thickness of this sample is 0.5 mm. The fluorescence emission spectrum of the sample is as image 3 shown, from image 3 It can be seen that the emission wavelength is at 675nm, and the half-maximum width is 32nm.

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Abstract

The invention discloses a preparation method of a composite material. The preparation method comprises the following step: carrying out melt extrusion on a mixture containing a polymer matrix and a perovskite precursor to obtain the composite material. The method for in-situ preparation of the perovskite quantum dot / polymer composite material by an extrusion process in the invention realizes the in-situ generation of perovskite quantum dots in a polymer matrix during extrusion processing, the obtained composite material may have multiple forms, and the in-situ generated perovskite quantum dotshave the characteristics of high fluorescence quantum yield, good stability and adjustable light-emitting wavelength, and can be applied to the fields of backlight display and the like.

Description

technical field [0001] The application relates to a method for in-situ preparation of perovskite quantum dot / polymer composite material by melt extrusion method and its application in backlight module, belonging to the field of display. Background technique [0002] With the development of quantum theory and the advancement of material growth technology, people can prepare low-dimensional materials with sizes close to the electron de Broglie wavelength. Due to the existence of quantum confinement effects, low-dimensional nanomaterials exhibit novel properties of force, heat, light, and electricity. The low-dimensional materials currently mainly studied include one-dimensional confined quantum wells, two-dimensional confined quantum wires and three-dimensional confined quantum dot structures. As the dimension decreases, the electronic density of states of the material gradually becomes discretized. Among them, semiconductor quantum dots are three-dimensionally confined nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/66C09K11/74C09K11/02C08L25/06C08L69/00C08L81/06C08L27/08C08L33/12C08K3/16C08K5/17C08K5/098H01L51/52H01L23/29G02F1/13357
CPCC09K11/06C09K11/665C09K11/7435C09K11/025C08K3/16C08K5/17C08K5/098H01L23/293G02F1/1336C09K2211/1007C08K2003/168H10K50/84C08L25/06C08L69/00C08L81/06
Inventor 李飞钟海政汪志腾柏泽龙
Owner ZHIJING NANOTECH CO LTD
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