Germinate yellow fluorescent powder and preparation method thereof

A yellow phosphor, germanate technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of high price, toxicity of citron salt, etc., and achieve the effect of mild preparation conditions

Inactive Publication Date: 2017-12-08
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Traditional phosphor materials mostly rely on activators or co-activators to emit light, and activators usually use rare earth elements, which are expensive and their oxides, chlorides, and citric salts are toxic. In addition, the preparation of phosphor materials often requires Harsh conditions such as high temperature reducing atmosphere

Method used

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  • Germinate yellow fluorescent powder and preparation method thereof
  • Germinate yellow fluorescent powder and preparation method thereof
  • Germinate yellow fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to Zn 1.999 GeO 3.9 S 0.1 : 0.001Mn 2+ Weigh ZnO, GeO 2 , ZnS and MnCO 3 , the molar ratio between them is 1.899:1:0.1:0.001. After fully grinding and mixing, place it in a crucible, then bake it in a high-temperature furnace at 1150°C for 7 hours in a nitrogen atmosphere, and then cool it to room temperature to obtain germanate yellow. Phosphor.

[0023] Such as figure 1 as shown, figure 1 It is the excitation spectrum diagram of the phosphor powder prepared in Example 1, and the monitoring wavelength is 570 nanometers. The excitation spectrum of the phosphor powder prepared in this embodiment is a broad spectrum, covering the ultraviolet and purple light regions. The excitation peak is located near 360 nm, and the spectral peak is high. The fluorescent powder of this embodiment can be effectively excited by ultraviolet and ultraviolet light chips. Such as figure 2 as shown, figure 2 It is the emission spectrum diagram of the phosphor powder prepa...

Embodiment 2

[0025] According to Zn 1.9 GeO 3.9 S 0.1 : 0.1Mn 2+ Weigh ZnO, GeO 2 , ZnS and MnCO 3 , the molar ratio between them is 1.8:1:0.1:0.1, after fully grinding and mixing evenly, place it in a crucible, then bake in a high-temperature furnace at 1350°C for 2 hours in an argon atmosphere, and then cool to room temperature to obtain germanate Yellow phosphor.

[0026] The excitation spectrum of the phosphor powder in this embodiment is a wide spectrum, covering the ultraviolet and violet light regions, and the excitation peak is located near 360nm, with a high spectral peak, indicating that the phosphor powder of this embodiment can be effectively excited by the ultraviolet and violet light chips. When the excitation wavelength of the emission spectrum is 360nm, the emission of the phosphor powder in this embodiment is broadband yellow light emission, and the emission peak is located near 570nm, indicating that the phosphor powder of this embodiment is suitable for yellow phosp...

Embodiment 3

[0028] According to Zn 1.999 GeO 2.001 S 1.999 : 0.001Mn 2+ Weigh ZnS, GeO 2 and MnCO 3 , the molar ratio between them is 1.999:1:0.001. After fully grinding and mixing, place it in a crucible, and then bake in a high-temperature furnace at 1250°C for 5 hours under a nitrogen atmosphere, and then cool to room temperature to obtain a germanate yellow phosphor. .

[0029] The excitation spectrum of the phosphor powder in this embodiment is a wide spectrum, covering the ultraviolet and violet light regions, and the excitation peak is located near 360nm, with a high spectral peak, indicating that the phosphor powder of this embodiment can be effectively excited by the ultraviolet and violet light chips. When the excitation wavelength of the emission spectrum is 360nm, the emission of the phosphor powder in this embodiment is broadband yellow light emission, and the emission peak is located near 570nm, indicating that the phosphor powder of this embodiment is suitable for yell...

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Abstract

The invention relates to the technical field of luminescent materials, in particular to germinate yellow fluorescent powder. The germinate yellow fluorescent powder has a chemical formula as follows: Zn2-xGeO4-ySy:xMn<2+>, wherein x is 0.001 to 0.1, and y is 0.1 to 1.99. The fluorescent powder does not contain a rare-earth element with higher price and has wide excitation bandwidth; and an excitation band of the fluorescent powder covers ultraviolet light and purple light areas, and the germinate yellow fluorescent powder can be used as the yellow fluorescent powder for an ultraviolet LED (light-emitting diode).

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to germanate yellow fluorescent powder and a preparation method thereof. Background technique [0002] White LED is a solid-state semiconductor device that converts electrical energy into white light, also known as semiconductor lighting. It has many advantages such as high efficiency, small size, long life, safety, low voltage, energy saving, and environmental protection. , Fluorescent lamps, and high-pressure gas discharge lamps are the fourth generation of lighting sources, which will be the mainstream products in the future lighting market. [0003] At present, there are various white light LED preparation methods, among which the combination of blue LED chip and yellow fluorescent material, combination of blue LED chip and red and green fluorescent material, and combination of purple LED chip and trichromatic fluorescent material are the three methods with low pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66
CPCC09K11/662
Inventor 余华季振国陈大钦陈雷锋钟家松赵红挺
Owner HANGZHOU DIANZI UNIV
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