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Preparation method for copper-zinc-tin-sulfur nano powder material

A nano-powder, copper-zinc-tin-sulfur technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of high price, increase operation steps and costs, and achieve low cost, high yield and short time. Effect

Inactive Publication Date: 2012-12-19
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solvent used in this synthesis method is oleylamine, the price is higher, and CHCl will be added when the reaction is completed. 3 To terminate the reaction, in order to prevent the formation of by-products, it is necessary to add dispersant and flocculant at the same time to precipitate the black CZTS powder, which increases the operation steps and cost

Method used

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  • Preparation method for copper-zinc-tin-sulfur nano powder material
  • Preparation method for copper-zinc-tin-sulfur nano powder material
  • Preparation method for copper-zinc-tin-sulfur nano powder material

Examples

Experimental program
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Effect test

Embodiment 1

[0026] In the process of synthesizing CZTS nanopowder, triethanolamine is used as a solvent. CuCl, ZnCl 2 , SnCl 2 ·2H 2 O and S powder in the triethanolamine solution, under normal pressure at 200 ℃ reflux to form Cu 2 ZnSnS 4 Nano powder material.

[0027] Weigh 2mmolCuCl, 1mmol ZnCl 2 And 1mmolSnCl 2 ·2H 2 O in a 50mL three-necked flask containing 10mL of triethanolamine, stir under nitrogen atmosphere, and stop heating when the oil bath is heated to 160℃. The color of the solution changes from light blue to dark blue to reddish brown, which is counted as solution A . Weigh 4mmol of S powder into a 50mL three-necked flask containing 10mL of triethanolamine, slowly raise the temperature to 200°C, and record it as solution B. Quickly inject solution B into solution A at high temperature, continue stirring under the protection of inert gas, reflux for 4 hours until the reaction is complete, stop stirring, after the temperature drops to room temperature, pour out the upper liquid...

Embodiment 2

[0029] In the process of synthesizing CZTS nanopowders, triethanolamine is still used as a solvent.

[0030] The two precursors were prepared by the above method, and the two solutions were cooled to room temperature, mixed at room temperature under a nitrogen atmosphere, and then heated to 220° C. and refluxed for 4 hours. Cool, wash and dry.

Embodiment 3

[0032] In the process of synthesizing CZTS nanopowder, polyethylene glycol-400 is used as a solvent.

[0033] Weigh 4mmolCuCl, 2mmolZnCl 2 And 2mmolSnCl 2 ·2H 2 O was placed in a 100mL three-necked flask containing 25mL polyethylene glycol-400, stirred under inert gas protection, and heated to 180°C in an oil bath. CuCl, ZnCl to be added 2 And SnCl 2 ·2H 2 After the O is completely dissolved, stop heating and cool to room temperature.

[0034] Weigh 8mmol of S powder and add it to a 100mL three-necked flask containing 25mL of polyethylene glycol-400, slowly raise the temperature to 180°C, stir until the sulfur powder is completely dissolved, stop heating and cool to room temperature. The two precursors prepared were mixed at room temperature, stirred under inert gas protection, slowly heated to 220°C in an oil bath, and refluxed for 8 hours until the reaction was complete. Stop stirring. After the temperature dropped to room temperature, pour out the upper liquid , Centrifuge the ...

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Abstract

A preparation method for a copper-zinc-tin-sulfur nano powder material belongs to the technical field of inorganic chemical materials. The preparation method comprises the following steps of: selecting alkanolamine or polyalcohol as solvent and dissolving a compound containing Cu, Zn and Sn with the mol ratio of Cu to Zn to Sn being 2:1:1 into the solvent; then dissolving a simple substance S of which the molar weight is two times that of Cu into another alkanolamine or polyalcohol solvent; and mixing two liquid systems, stirring under the protection of inert gas, heating to 200-280DEG C, carrying out reflowing reaction for 4-10 hours and cooling to room temperature and taking black powder on a lower layer for centrifugal separating, washing and drying to obtain copper-zinc-tin-sulfur compound nano powder. The preparation method disclosed by the invention can be used for preparing the copper-zinc-tin-sulfur compound nano powder material with the advantages of nanoscale, uniformity in size, favorable dispersity and high phase purity and has the characteristics of high efficiency, high yield, low cost, favorable repeatability, simpleness in operation and easiness in control. The copper-zinc-tin-sulfur compound nano powder material prepared by the preparation method disclosed by the invention can be used for preparing slurry of a solar battery absorbing layer.

Description

Technical field [0001] The invention belongs to the technical field of inorganic chemical materials and relates to a preparation method of copper, zinc, tin and sulfur nano powder materials. Background technique [0002] Cu 2 Zn 1-x Sn x S 2 (0 <x <1) (CZTS) is collectively referred to as copper tin selenium sulphur compounds. Because of its good light absorption performance, high stability, and unique structure and electrical properties, it has become a promising photovoltaic material. The conversion efficiency of high-efficiency solar cells with CZTS nanopowder as the absorption layer has reached 7.2%. [0003] A literature search found that there are many methods for preparing copper, tin, selenium, and sulfur powder materials. Guo Shiju et al. (Guo Shiju, Wang Lupeng, Yang Yonggang, Nie Hongbo, Wang Yanlai. A preparation of Cu 2 ZnSnS 4 Semiconductor thin film solar cell absorber layer process. CN100500729C) Cu, Zn and Sn particles are mixed in a stoichiometric ratio of ...

Claims

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Application Information

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IPC IPC(8): C01G19/00B82Y30/00
Inventor 吴孟强张树人张其翼刘文龙
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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