Preparation method of Cu2ZnSnSxSe4-x nanocrystal

A nanocrystal and reactant technology, applied in the field of solar photovoltaic materials, can solve the problems of few nanocrystal reports, and achieve the effects of good crystallinity, simple preparation method and low cost

Inactive Publication Date: 2010-06-09
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] But so far, Cu 2 ZnSnS x Se 4-x Ther...

Method used

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  • Preparation method of Cu2ZnSnSxSe4-x nanocrystal
  • Preparation method of Cu2ZnSnSxSe4-x nanocrystal
  • Preparation method of Cu2ZnSnSxSe4-x nanocrystal

Examples

Experimental program
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Effect test

Embodiment 1

[0019] 12 ml of oleylamine was added to a 50 ml three-necked round bottom flask connected to a Schlenk line apparatus, and the temperature was raised to 130°C for 30 minutes under argon atmosphere. The reactant precursors 0.2 mmol copper acetylacetonate, 0.1 mmol zinc acetate, 0.1 mmol tin tetrachloride and 0.4 mmol sulfur powder were successively added to the reaction flask, and the reaction temperature was slowly raised to 280 in an argon atmosphere. The reaction was carried out at °C for 20 minutes, the heating device was removed, the reactant was cooled to 80 °C, and methanol was added to the cooled reactant to precipitate the nanoparticles. The nanocrystals were then collected by centrifugation at 12,000 rpm for 3 minutes, the suspension was poured into another container, and the final precipitate was dispersed in chloroform.

Embodiment 2

[0021] 12 ml of oleylamine was added to a 50 ml three-necked round bottom flask connected to a Schlenk line apparatus, and the temperature was raised to 130°C for 30 minutes under argon atmosphere. The reactant precursors 0.2 mmol copper acetylacetonate, 0.1 mmol zinc acetate, 0.1 mmol tin tetrachloride and 0.4 mmol hexamethyldisilazane were successively added to the reaction flask, and the reaction temperature was slowed down in an argon atmosphere. The temperature was raised to 270 °C for 15 minutes, the heating device was removed, the reactant was cooled to 80 °C, and methanol was added to the cooled reactant to precipitate the nanoparticles. The nanocrystals were then collected by centrifugation at 12,000 rpm for 3 minutes, the suspension was poured into another container, and the final precipitate was dispersed in chloroform.

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Abstract

The invention discloses a preparation method of a Cu2ZnSnSxSe4-x nanocrystal with low cost and high quality, which comprises the steps of: adding reactant precursors of oleylamine, cupric acetylacetonate, zinc acetate, tin tetrachloride, sulfur powder and selenium powder into a reaction flask, then heating the reactant precursors for reacting to obtain the Cu2ZnSnSxSe4-x nanocrystal with high quality. The invention has the advantages that the preparation method of the nanocrystal is simple, the materials of the precursors have low cost and no toxicity, and the prepared nanocrystal particles have better dispersivity and crystallinity and the like. The nanocrystal prepared by the invention can be used as an absorption layer of a photovoltaic device.

Description

technical field [0001] The invention belongs to the field of solar photovoltaic materials, and relates to a preparation method of semiconductor nanocrystals. The invention adopts the solution chemical method system to prepare low-cost and high-quality Cu 2 ZnSnS x Se 4-x Nanocrystalline. Background technique [0002] With the continuous development of economy and society, non-renewable energy sources such as coal, oil and natural gas are increasingly exhausted, and energy problems have become a major problem faced by all human beings for survival and development. Photovoltaic technology, which converts solar energy into electricity, is an important means to solve energy problems in the future. Reducing device cost and improving device efficiency are the goals pursued by solar cell researchers. [0003] Advances in the synthesis of high-quality nanocrystals hold great promise for low-cost and high-efficiency solar cell devices. Much has been written about Cu 2 S, CdTe,...

Claims

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Application Information

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IPC IPC(8): C01B19/00B82B3/00H01L31/18
CPCY02P70/50
Inventor 刘玉峰陈鑫葛美英吴杰孙艳戴宁
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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