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Preparation method of europium-doped yttrium vanadate nanopowder for solar cell down conversion material

A technology for solar cells and conversion materials, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of uneven particle size of powder, difficulty in controlling the pH of sol, etc., and achieve the effect of simple operation

Inactive Publication Date: 2017-03-29
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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Problems solved by technology

[0005] Preparation of YVO by traditional sol-gel method 4 :Eu 3+ In the nanopowder process, the pH of the sol is difficult to control, resulting in the uneven particle size of the prepared powder

Method used

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  • Preparation method of europium-doped yttrium vanadate nanopowder for solar cell down conversion material
  • Preparation method of europium-doped yttrium vanadate nanopowder for solar cell down conversion material
  • Preparation method of europium-doped yttrium vanadate nanopowder for solar cell down conversion material

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preparation example Construction

[0014] See figure 1 , the invention provides a YVO 4 :Eu 3+ The preparation method of nanopowder, it comprises the following steps:

[0015] S1: weigh diyttrium trioxide (Y) with a molar ratio of 1:1 2 o 3 ) and europium trioxide (Eu 2 o 3 ), mixed and added to the acid solution, so that Y 2 o 3 and Eu 2 o 3 After dissolving, a clear salt solution is obtained, and the metal ions in the clear salt solution are yttrium ions and europium ions;

[0016] S2: Add ammonium metavanadate (NH 4 VO 3 ), the molar ratio of ammonium metavanadate to metal ions is 1:1;

[0017] S3: adding citric acid solution, the concentration of citric acid solution is 1.4-1.6 mol / liter, so that the molar ratio of citric acid to metal ion is 2:1;

[0018] S4: Measure a certain amount of ammonia water, and slowly add the quantitative amount of ammonia water to the solution containing citric acid; and

[0019] S5: Add a certain amount of dispersant, age for a period of time to obtain a sol, hea...

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Abstract

A preparation method of a solar cell down-conversion material YVO4:Eu3<+> nanopowder comprises the following steps: weighing yttria (Y2O3) and europium(III) oxide (Eu2O3) according to a molar ratio of 1:1, mixing, adding the obtained mixture to nitric acid, and dissolving Y2O3 and Eu2O3 to obtain a clarified solution containing yttrium ions and europium ions; adding ammonium metavanadate (NH4VO3) to the clarified solution according to a molar ratio of ammonium metavanadate to the above metal ions of 1:1; adding a citric acid solution with the concentration of 1.4-1.6mol / L to make a molar ratio of citric acid to the metal ions reach 2:1; taking a quantitative amount of ammonia water, and slowly adding the quantitative amount of ammonia water to the above obtained citric acid-containing solution; adding a certain amount of a dispersing agent, and aging for a period of time to obtain a sol; and heating the sol to obtain xerogel, and grinding the xerogel to obtain the YVO4:Eu3<+> nanopowder.

Description

technical field [0001] The present invention relates to a kind of europium-doped yttrium vanadate (YVO 4 :Eu 3+ ) nano powder preparation method, the YVO 4 :Eu 3+ Nanopowders are used as down conversion materials for solar cells. Background technique [0002] As a green energy that can solve the depletion of fossil fuels and the problems of the earth's environment, solar energy has attracted more and more attention from the world. The actual photoelectric conversion efficiency of widely used silicon-based solar cells is about 15%. How to fully and rationally utilize sunlight and improve the photoelectric conversion efficiency of silicon-based solar cells is one of the current issues of widespread concern. Silicon solar cells have different spectral responses to light waves of different wavelengths, the maximum spectral response is around 1000nm, and the spectral response to short-wavelength sunlight of 300-500nm is very weak, so if the short-wavelength light can be conv...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/82
Inventor 檀满林尚旭冉王晓伟陈建军
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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