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Tungstate near infrared quantum cutting material and preparation method and application thereof

A quantum tailoring and near-infrared technology, which is applied in the direction of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., can solve problems such as damaging human health and polluting the environment, and achieve low work efficiency, wide excitation spectrum, and strong absorption effect

Inactive Publication Date: 2012-04-25
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Toxic chemicals are used in the preparation process of fluoride, and gases harmful to the human body and the environment will be produced, thereby damaging human health and polluting the environment

Method used

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  • Tungstate near infrared quantum cutting material and preparation method and application thereof
  • Tungstate near infrared quantum cutting material and preparation method and application thereof
  • Tungstate near infrared quantum cutting material and preparation method and application thereof

Examples

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preparation example Construction

[0041] The preparation method of the tungstate near-infrared quantum tailoring material of the present invention, wherein, the chemical composition formula of the tungstate near-infrared quantum tailoring material is Ca 0.99-x WO 4 :0.01Nd 3+ , xYb 3+ , Ca 0.99-x WO 4 as the matrix, Nd 3+ , Yb 3+ is the doped rare earth ion, x is the molar weight of the doped rare earth ion, 0.01≤x≤0.3; including the following steps:

[0042] According to the chemical composition formula of the tungstate near-infrared quantum tailoring material, calcium raw material, tungsten raw material, neodymium raw material and ytterbium raw material are mixed according to the stoichiometric ratio, and ground;

[0043] Precalcining the mixed raw materials in air at a temperature of 300-500°C;

[0044] Cool the pre-calcined material to room temperature and grind again;

[0045] Calcining the reground raw materials at a temperature of 900-1000°C;

[0046] Cool the calcined material to room temperat...

Embodiment 1

[0049] Example 1: Tungstate near-infrared quantum tailoring material Ca 0.89 WO 4 :0.01Nd 3+ , 0.1Yb 3+ preparation of

[0050] Calcium carbonate (CaCO 3 )0.5939g, tungsten trioxide (WO 3 ) 1.5457g, neodymium oxide (Nd 2 o 3 )0.0122g and ytterbium oxide (Yb 2 o 3 ) 0.1314g. After the above raw materials were ground and mixed in an agate mortar, they were put into a corundum crucible, and pre-calcined at a temperature of 400°C for 2 hours. Then cool the pre-calcined powder to room temperature, take it out and grind it. Then calcined again at a temperature of 900°C for 4 hours, after cooling, ground again until pulverized and sieved to obtain a tungstate near-infrared quantum tailoring material Ca with a particle size of 100nm-100μm. 0.89 WO 4 :0.01Nd 3+ , 0.1Yb 3+ .

[0051] Adopt Japan Shimadzu XRD-6000 type X-ray polycrystal diffractometer (radiation source is Cu target K α , 40kV, 30mA, λ=0.15406nm, step size 0.02, scan range 10°~90°), measure the X-ray diffr...

Embodiment 2

[0053] Example 2: Tungstate near-infrared quantum tailoring material Ca 0.98 WO 4 :0.01Nd 3+ , 0.01Yb 3+ preparation of

[0054] Weigh calcium nitrate (Ca(NO 3 ) 2 4H 2 O) 1.5428g, tungsten trioxide (WO 3 ) 1.5457g, neodymium nitrate (Nd(NO 3 ) 3 ·6H 2 O) 0.0292g and ytterbium nitrate (Yb(NO 3 ) 3 ·5H 2 O) 0.0299g. After the above raw materials were ground and mixed in an agate mortar, they were put into a corundum crucible and pre-calcined for 3 hours at a temperature of 500°C. Then cool the pre-calcined powder to room temperature, take it out and grind it. Then calcined again at a temperature of 1000°C for 5 hours, after cooling, ground again until pulverized and sieved to obtain a tungstate near-infrared quantum tailoring material Ca with an average particle size of 100nm-100μm 0.98 WO 4 :0.01Nd 3+ , 0.01Yb 3+ .

[0055] Same as Example 1, the X-ray diffraction test shows that the prepared tungstate near-infrared quantum tailoring material is a single cry...

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Abstract

The invention provides a tungstate near infrared quantum cutting material and a preparation method and an application thereof, and the chemical composition formula of the quantum cutting material is Ca0.99-xWO4:0.01Nd3+, xYb3+, wherein Ca0.99-xWO4 is a substrate; Nd3+ and Yb3+ are doped rare earth ions; x is the molar quantity of the doped rare earth ion Yb3+, and 0.01<=x<=0.3. The preparation method of the quantum cutting material adopts a traditional high temperature solid phase calcining method to synthesize the tungstate near infrared quantum cutting material. The tungstate near infrared quantum cutting material can be excited by visible light of 300-700 nm, and emit high-intensity near infrared light within a range of 900-1500 nm; the light within the wave band can be effectively absorbed by silicon-based solar energy cells, and has calculated quantum efficiency of up to 181%. The tungstate near infrared quantum cutting material is applicable to the preparation of solar energy cells.

Description

technical field [0001] The invention relates to a tungstate near-infrared quantum tailoring material and its preparation method and application; in particular, it relates to a tungstate near-infrared quantum tailoring material suitable for solar spectrum conversion and its preparation method and application. Background technique [0002] Quantum-cutting, also known as energy down-conversion, refers to the phenomenon that a material emits more than one photon under the excitation of a high-energy photon, that is, a phenomenon in which the quantum efficiency is greater than 100%. Quantum tailoring effect can be applied to high-efficiency phosphors excited by VUV photons for green lighting and plasma TV; new scintillators that can be applied to high-energy physics research and medical diagnosis; high-efficiency, All solid-state VUV laser materials, etc. As an ideal material, quantum tailoring materials have gradually become the focus of researchers' attention in recent decades...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/68H01L51/46
CPCY02E10/549
Inventor 孙家跃杜海燕曹纯
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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