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Preparation method and application of Zn < 2 + > doped CsPbBr3 nanocrystalline phosphosilicate glass

A technology of phosphosilicate glass and nanocrystals, which is applied in glass manufacturing equipment, glass molding, glass furnace equipment, etc., can solve the problems of different light attenuation of the three primary colors, unstable color temperature, etc., and achieve improved thermal stability and chemical stability. The effect of stability

Pending Publication Date: 2020-12-18
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To realize white light LED, it is inevitable to use blue, green and red primary colors. At present, the blue light part of common white light LEDs uses blue light GaN chips, but it will bring a series of problems, such as the different light attenuation of the three primary colors. Unstable color temperature, etc., so it is an important issue to use other chips to broaden the implementation of white LEDs

Method used

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  • Preparation method and application of Zn &lt; 2 + &gt; doped CsPbBr3 nanocrystalline phosphosilicate glass
  • Preparation method and application of Zn &lt; 2 + &gt; doped CsPbBr3 nanocrystalline phosphosilicate glass
  • Preparation method and application of Zn &lt; 2 + &gt; doped CsPbBr3 nanocrystalline phosphosilicate glass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh raw materials according to the following molar percentages:

[0036] P 2 o 5 : 56%, SiO 2 : 10%, Al 2 o 3 : 3%, SrCO 3 : 6%, Cs 2 CO 3 : 10%, PbBr 2 : 5%, NaBr: 10%;

[0037] Prepare the above CsPbBr as follows 3 Nanocrystalline phosphosilicate glass,

[0038] 1) Weigh the raw materials according to the molar percentage designed for the glass component, put them in a mixing bottle, add an appropriate amount of ethanol and zirconia mixing balls of appropriate size and proportion, and wet-mix ball milling for more than 12 hours to fully mix the raw materials evenly;

[0039] 2) After mixing evenly, transfer the raw materials from the mixing bottle to an evaporating dish, and place the evaporating dish in a blast drying oven for drying. After drying, transfer the raw materials from the evaporating dish to a corundum crucible, and put the Put the corundum crucible of the raw material into the electric melting furnace and melt it at 1200°C for 30 minutes;

...

Embodiment 2

[0044] Weigh raw materials according to the following molar percentages:

[0045] P 2 o 5 : 56%, SiO 2 : 10%, Al 2 o 3 : 3%, SrCO 3 : 6%, Cs 2 CO 3 : 10%, PbBr 2 : 1%, NaBr: 10%; ZnBr 2 : 3%;

[0046] Prepare the above CsPbBr as follows 3 Nanocrystalline phosphosilicate glass,

[0047] 1) Weigh the raw materials according to the molar percentage designed for the glass component, put them in a mixing bottle, add an appropriate amount of ethanol and zirconia mixing balls of appropriate size and proportion, and wet-mix ball milling for more than 12 hours to fully mix the raw materials evenly;

[0048] 2) After mixing evenly, transfer the raw materials from the mixing bottle to an evaporating dish, and place the evaporating dish in a blast drying oven for drying. After drying, transfer the raw materials from the evaporating dish to a corundum crucible, and put the Put the corundum crucible of the raw material into the electric melting furnace, and melt it in the temper...

Embodiment 3

[0053] Weigh raw materials according to the following molar percentages:

[0054] P 2 o 5 : 56%, SiO 2 : 10%, Al 2 o 3 : 3%, SrCO 3 : 6%, Cs 2 CO 3 : 10%, PbBr 2 : 1%, NaBr: 10%; ZnBr 2 : 4%;

[0055] Prepare the above CsPbBr as follows 3 Nanocrystalline phosphosilicate glass,

[0056] 1) Weigh the raw materials according to the molar percentage designed for the glass component, put them in a mixing bottle, add an appropriate amount of ethanol and zirconia mixing balls of appropriate size and proportion, and wet-mix ball milling for more than 12 hours to fully mix the raw materials evenly;

[0057] 2) After mixing evenly, transfer the raw materials from the mixing bottle to an evaporating dish, and place the evaporating dish in a blast drying oven for drying. After drying, transfer the raw materials from the evaporating dish to a corundum crucible, and put the Put the corundum crucible of the raw material into the electric melting furnace, and melt it in the temper...

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Abstract

The invention relates to the technical field of luminescent materials and devices, in particular to a preparation method and application of Zn < 2 + > doped CsPbBr3 nanocrystalline phosphosilicate glass, and the method comprises the following steps: melting uniformly mixed raw materials at a certain temperature to obtain molten glass; pouring the molten glass into a mold for molding, annealing ata certain temperature for a certain time, and cooling to room temperature; and carrying out heat treatment on the product at a certain temperature for 1-10 hours to obtain the Zn < 2 + > doped CsPbBr3nanocrystalline phosphosilicate glass. According to the preparation method disclosed by the invention, the adjustment of the sizes of the CsPbBr3 nanocrystal and the Zn < 2 + > doped CsPbBr3 nanocrystal can be realized, and the band gap of the CsPbBr3 nanocrystal is reduced through Zn < 2 + > doping, so that the spectrum is subjected to blue shift, and blue light is presented. The Zn < 2 + > doped CsPbBr3 nanocrystalline phosphosilicate glass prepared by the method can be used for preparing a white light LED.

Description

technical field [0001] The invention relates to the technical field of luminescent materials and devices, in particular to a Zn 2+ Doped CsPbBr 3 Preparation method and application of nanocrystalline phosphosilicate glass. Background technique [0002] In the past few decades, the field of optoelectronic information has developed greatly, and optical materials are widely used in the field of optoelectronics, which play an important role in social development and directly affect people's daily life. Among them, the quality of luminescent materials is particularly important, and generally depends on several important properties, such as quantum yield (PLQY), spectral purity and stability, etc. [0003] Semiconductor nanocrystals are quasi-zero-dimensional semiconductor nanocrystal particles. When the grain size of semiconductor materials is gradually reduced to the excitonic Bohr radius, the continuous energy band structure of the bulk material becomes a discrete energy lev...

Claims

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Application Information

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IPC IPC(8): C03C10/16C03B5/16C03B19/02C03B25/00C03B32/02
CPCC03C10/16C03B5/16C03B19/02C03B25/00C03B32/02
Inventor 张继红余淼田启航程方亮张福军李明
Owner WUHAN UNIV OF TECH
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