Alkaline earth molybdate rare earth light conversion material and preparation method thereof

A technology of earth molybdate and salts, which is applied in the field of alkaline earth molybdate rare earth light conversion materials and its preparation, can solve the problems of weak absorption strength, etc., achieve the effects of easy operation, simple preparation method, and improved photoelectric conversion efficiency

Inactive Publication Date: 2011-02-02
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these sensitizing ions have absorption in the ultraviolet to visible region, their absorption is linear and the absorption intensity is relatively weak.

Method used

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  • Alkaline earth molybdate rare earth light conversion material and preparation method thereof
  • Alkaline earth molybdate rare earth light conversion material and preparation method thereof
  • Alkaline earth molybdate rare earth light conversion material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Sr 2 (Ca 1.01 Yb 3+ 0.02 Li + 0.02 ) MoO 6 Preparation of Rare Earth Light Conversion Materials

[0018] Strontium carbonate (SrCO 3 ) 0.5905g, calcium carbonate (CaCO 3 ) 0.2025g, molybdenum trioxide (MoO 3 ) 0.2879g, ytterbium trioxide (Yb 2 o 3 ) 0.0079g, charge compensator lithium carbonate (Li 2 CO 3 ) 0.0016g, after grinding and mixing the above-mentioned raw materials in an agate mortar, put them into a corundum crucible, first burn them in the air at 500°C for 14 hours, then take them out and grind them, then put them into a corundum crucible, and then put them in a corundum crucible Sinter in the air at 800°C for 14 hours, then take it out and grind it, put it into a corundum crucible, and finally sinter it in the air at 1000°C for 28 hours, cool to room temperature, take it out and grind it thoroughly to get the sample.

Embodiment 2

[0019] Example 2: Sr 2 (Ca 0.93 Yb 3+ 0.06 Li + 0.06 ) MoO 6 Preparation of Rare Earth Light Conversion Materials

[0020] Strontium carbonate (SrCO 3 ) 0.5909g, calcium carbonate (CaCO 3 ) 0.1862g, molybdenum trioxide (MoO 3 ) 0.2882g, ytterbium trioxide (Yb 2 o 3 ) 0.0238g, charge compensator lithium carbonate (Li 2 CO 3 ) 0.0045g, after grinding and mixing the above-mentioned raw materials in an agate mortar, put them into a corundum crucible, first burn them in the air at 600°C for 12 hours, then take them out and grind them, then put them into a corundum crucible, and then put them in a corundum crucible Sinter in the air at 900°C for 12 hours, then take it out and grind it, put it into a corundum crucible, and finally sinter it in the air at 1100°C for 24 hours, cool to room temperature, take it out and grind it thoroughly to get the sample.

Embodiment 3

[0021] Example 3: Sr 2 (Ca 0.85 Yb 3+ 0.1 Li + 0.1 ) MoO 6 Preparation of Rare Earth Light Conversion Materials

[0022] Strontium carbonate (SrCO 3 ) 0.5907g, calcium carbonate (CaCO 3 ) 0.1705g, molybdenum trioxide (MoO 3 ) 0.2880g, ytterbium trioxide (Yb 2 o 3 ) 0.0394g, charge compensator lithium carbonate (Li 2 CO 3 ) 0.0076g, after grinding and mixing the above-mentioned raw materials in an agate mortar, put them into a corundum crucible, first burn them in the air at 700°C for 10 hours, then take them out and grind them, then put them into a corundum crucible, and then put them in a corundum crucible Sinter at 1000°C in the air for 10 hours, then take it out and grind it, put it into a corundum crucible, and finally sinter at 1200°C in the air for 20 hours, cool 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 ....

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Abstract

The invention discloses an alkaline earth molybdate rare earth light conversion material and a preparation method thereof. The light conversion material has a composition general formula of (Sr1-xBax)2(Ca1.05-2yYbyLiy)MoO6, wherein x is greater than or equal to 0 and less than or equal to 1; and y is greater than or equal to 0.02 and less than or equal to 0.12. The preparation method of the fluorescent powder comprises the following steps of: accurately weighing raw materials according to the proportion of the general formula; fully grinding and uniformly mixing oxides or corresponding salts of elements in the composition general formula; sintering the mixture in air atmosphere at the temperature of between 500 and 700 DEG C for 10 to 14 hours, cooling and crushing the mixture; then sintering the mixture in the air atmosphere at the temperature of between 800 and 1,000 DEG C for 10 to 14 hours, cooling and uniformly grinding the mixture in an agate mortar; and finally sintering the mixture in the air atmosphere at the temperature of between 1,000 and 1,200 DEG C for 20 to 28 hours, cooling and uniformly grinding the mixture in the agate mortar so as to obtain the alkaline earth molybdate fluorescent powder. The rare earth light conversion material disclosed by the invention has the advantages of broadband excitation, strong near infrared emission and the like from an ultraviolet region to a visible region and can be used as the rare earth light conversion material for silicon-based solar cells.

Description

technical field [0001] The invention relates to the field of light conversion materials, in particular to an alkaline earth molybdate rare earth light conversion material 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 photodiode will convert the sun's li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 王静王恩燕苏锵
Owner SUN YAT SEN UNIV
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