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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: 2011-08-10
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But so far, Cu 2 ZnSnS x Se 4-x There are few reports on the preparation of nanocrystals

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] Add 12ml of oleylamine into a 50ml three-necked round-bottomed flask connected to a Schlenk line, and raise the temperature to 130°C in an argon atmosphere to degas for 30 minutes. The reactant precursor 0.2mmol copper acetylacetonate, 0.1mmol zinc acetate, 0.1mmol tin tetrachloride and 0.4mmol sulfur powder were added to the reaction flask in turn, and the reaction temperature was slowly raised to 280°C in an argon atmosphere. °C for 20 minutes, remove the heating device to cool the reactant to 80 °C, add methanol to the cooled reaction product to settle the nanoparticles. Then, the nanocrystals were collected by centrifugation at a speed of 12000 rpm for 3 minutes, the suspension was poured into another container, and finally the precipitate was dispersed in chloroform.

Embodiment 2

[0021] Add 12ml of oleylamine into a 50ml three-necked round-bottomed flask connected to a Schlenk line, and raise the temperature to 130°C in an argon atmosphere to degas for 30 minutes. The reactant precursors 0.2mmol copper acetylacetonate, 0.1mmol zinc acetate, 0.1mmol tin tetrachloride and 0.4mmol hexamethyldisilathane were added to the reaction flask in turn, and the reaction temperature was slowly reduced in an argon atmosphere. The reaction temperature was increased to 270° C. for 15 minutes, and the heating device was removed to cool the reactant to 80° C., and methanol was added to the cooled reaction product to allow the nanoparticles to settle. Then, the nanocrystals were collected by centrifugation at a speed of 12000 rpm for 3 minutes, the suspension was poured into another container, and finally the 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 method for preparing semiconductor nanocrystals. The present invention adopts the solution chemical method system to prepare low-cost, 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 issues have become a major issue facing the survival and development of all human beings. Photovoltaic technology, which converts solar energy into electrical energy, is an important means to solve energy problems in the future. Reducing device cost and improving device efficiency are the goals pursued by researchers engaged in solar cells. [0003] Advances in the synthesis of high-quality nanocrystals hold great promise for low-cost and high-efficiency solar cell devices. There have been many stu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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