Method for preparing solar energy absorbing layer material Cu2ZnSnS4 by hydrothermal synthesis

Abstract

The invention relates to a method for preparing a solar energy absorbing layer material Cu2ZnSnS4 by hydrothermal synthesis. The method comprises the following steps of: (1) proportioning the salts of Cu<2+>, Zn<2+> and Sn<2+> in a mole ratio of 2:1:1, placing the salts in a round-bottom flask, then adding ethylene glycol into the salts to prepare solution A, and stirring the solution for dissolution at the room temperature; (2) proportioning solid Na2S in an amount which is 1 to 5 times the total amount of the Cu<2+>, Zn<2+> and Sn<2+> materials, adding the ethylene glycol into the solid Na2S to prepare solution B, and performing ultrasonic dissolution; and (3) under a stirring condition, adding the solution B into the solution A, transferring the mixed solution into an autoclave for reaction, and performing centrifugal separation to obtain a Cu2ZnSnS4 nanosphere. The method has the advantages of low requirement on equipment, relatively simpler operation, easily-controlled components, large-scale production and providing good application prospect for the preparation of an efficient and low-cost solar cell.

Description

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AI Technical Summary

Benefits of technology

This patented technology involves developing an improved way for making copper zinc sulfide (Cu2Zn) selenides that absorb light better than existing methods such as hydrocracking or other techniques currently being developed. By doing this with less expensive starting products at lower temperatures, it becomes possible to make large amounts more efficiently while also reducing its production costs compared to current processes.

Problems solved by technology

This patents describes different ways to make better quality photovoltaics that can be used on various applications such as space exploration or power generation systems. However, current techniques require specialist skills and involve complicated processes with multiple steps involving chemical reactions at extreme temperatures. Additionally, there may exist safety concerns associated with these traditional approaches.

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