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Alkali metal alkaline earth metal phosphate phosphor and preparation method thereof

A technology of alkali metal alkali and earth metal, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of weak absorption and no absorption, and achieve the effects of easy operation, simple preparation method, and improved photoelectric conversion efficiency

Inactive Publication Date: 2010-10-20
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the rare earth light conversion materials for silicon-based solar cells that have been studied more mainly use Yb 3+ ion infrared emission, but Yb 3+ Ions absorb weakly or have almost no absorption in the ultraviolet to visible region

Method used

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  • Alkali metal alkaline earth metal phosphate phosphor and preparation method thereof
  • Alkali metal alkaline earth metal phosphate phosphor and preparation method thereof
  • Alkali metal alkaline earth metal phosphate phosphor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1: LiSr 0.994 PO 4 :Eu 2+ 0.005 , Pr 3+ 0.001 Preparation of Rare Earth Light Conversion Materials

[0020] Weigh lithium dihydrogen phosphate (LiH 2 PO 4 ) 0.5196g, strontium carbonate (SrCO 3 )0.7337g, europium trioxide (Eu 2 o 3 ) 0.0044g, hexapraseodymium undecyl oxide (Pr 6 o 11 ) 0.0009g, after grinding and mixing the above-mentioned raw materials in an agate mortar, put them into a corundum crucible, first burn them at 600°C for 2 hours, take them out after cooling to room temperature and grind them fully, then put them into a corundum crucible, Before heating, pass high-purity nitrogen gas to exhaust the air in the quartz tube, and finally burn it in a CO atmosphere at 1350°C for 3 hours, cool it to room temperature, take it out and grind it thoroughly to get the sample. The room temperature excitation and emission spectra of this rare earth light conversion material are shown in figure 1 .

Embodiment 2

[0021] Example 2: Li 0.9 Na 0.1 Sr 0.985 PO 4 :Eu 2+ 0.01 , Pr 3+ 0.005 Preparation of Rare Earth Light Conversion Materials

[0022] Strontium carbonate (Li 2 CO 3 ) 0.1663g, sodium carbonate (NaCO 3 ) 0.0265g, strontium carbonate (SrCO 3 ) 0.7271g, diammonium hydrogen phosphate ((NH 4 ) 2 HPO 4 )0.6603g, europium trioxide (Eu 2 o 3 ) 0.0088g, hexapraseodymium undecyl oxide (Pr 6 o 11 ) 0.0043g, after grinding and mixing the above-mentioned raw materials in an agate mortar, put them into a corundum crucible, first burn them at 500°C for 3 hours, take them out after cooling to room temperature and grind them fully, then put them into a corundum crucible, Before heating, pass high-purity nitrogen gas to exhaust the air in the quartz tube, and finally in N 2 and H 2 Ignite at 1250°C for 4 hours in a mixed atmosphere, take it out after cooling to room temperature, and grind thoroughly to obtain a sample.

Embodiment 3

[0023] Example 3: LiBa 0.97 PO 4 :Eu 2+ 0.01 , Pr 3+ 0.02 Preparation of Rare Earth Light Conversion Materials

[0024] Weigh lithium dihydrogen phosphate (LiH 2 PO 4 ) 0.5196g, barium carbonate (BaCO 3 )0.9571g, europium trioxide (Eu 2 o 3 ) 0.0088g, hexapraseodymium undecyl oxide (Pr 6 o 11 ) 0.0170g, after grinding and mixing the above-mentioned raw materials in an agate mortar, put them into a corundum crucible, first burn them at 600°C for 2 hours, take them out after cooling to room temperature and grind them fully, then put them into a corundum crucible, Then put the crucible into a large crucible filled with activated carbon and close the lid tightly, put it into a box furnace and burn it at 1200°C in a CO atmosphere for 4 hours, cool it to room temperature, take it out and grind it thoroughly to get the sample.

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Abstract

The present invention discloses an alkali metal alkaline earth metal phosphate phosphor and a preparation method thereof. The general formula of the material is as follows: AB1-x-yPO4: Eu2 + x, Pr3 + y. The preparation method of the phosphor comprises the following steps: accurately weighing raw materials in proportion of the general formula; and after uniformly mixing and grinding, allowing oxides or the corresponding salts of elements in the general formula to be sintered for 2-4 hours at a temperature of 400-600 DEG C in an air atmosphere, then be sintered for 3-6 hours at a temperature of 850-1350 DEG C in a reducing atmosphere, and be uniformly ground by an agate mortar after being cooled. The light conversion material disclosed by the invention has the advantages of strong absorption in a wavelength range of 250-650nm, a main emission peak of 930nm-1100nm, broad band excitation from ultraviolet to visible light regions and strong near-infrared emission, and the like, and can be used as a light conversion material for silicon-based solar cells.

Description

technical field [0001] The invention relates to the field of rare earth light conversion materials for silicon-based solar cells, in particular to an alkali metal alkaline earth metal phosphate phosphor and a preparation method thereof. Background technique [0002] Due to the energy crisis, the development of new energy sources has become an important research topic in the world today. Among many new energy sources, solar energy is an inexhaustible renewable energy source for human beings. It is also a clean energy source and does not produce any environmental pollution. Therefore, the research and utilization of solar energy has attracted much attention. The fastest growing and most dynamic research field is the photovoltaic utilization of solar energy, that is, solar cells. A solar cell is a device that converts sunlight energy directly into electrical energy due to the photovoltaic effect. It is a semiconductor photodiode. When the sun shines on the photodiode, the phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/71
Inventor 王静陈岩苏锵
Owner SUN YAT SEN UNIV
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