A kind of preparation method of copper-zinc-tin-sulfur film material

Abstract

The invention belongs to the technical field of new energy sources of photoelectric materials, and relates to a preparation method of a copper-zinc-tin-sulfur film material. The method comprises the following steps: taking copper, zinc and tin nano powder as raw materials, uniformly mixing with sulfur powder, ethylenediamine, absolute ethanol and sodium borohydride, washing and drying after ball milling to obtain copper zinc tin sulfur nano powder; The powder is uniformly mixed with polyvinyl alcohol, isopropanol, iodine element and isopropanol to form a colloidal solution as an electrophoretic liquid; electrophoretic deposition of copper, zinc, tin and sulfur thin film coatings on the substrate by electrophoretic deposition method to form an electrophoretic deposition film; The electrophoretic deposition membrane is dried and vulcanized and annealed to form a copper-zinc-tin-sulfur thin film material. The present invention adopts the electrophoretic deposition technology and the reduction sulfurization comprehensive annealing treatment process to prepare the copper zinc tin sulfur film material with a honeycomb porous structure, which has a large specific surface area, reduces the cost, and effectively improves the solar energy absorption rate and photoelectric conversion efficiency of the photovoltaic thin film battery . The invention is suitable for preparing thin film photovoltaic cells.

Description

technical field [0001] The invention belongs to the technical field of new energy sources of optoelectronic materials, in particular to a method for preparing a copper-zinc-tin-sulfur film material, in particular to the preparation of a copper-zinc-tin-sulfur (CZTS) compound semiconductor film with a specific honeycomb porous structure and a specific crystal structure method. Background technique [0002] Thin-film photovoltaic cells have become one of the very promising development directions in solar photovoltaic conversion and utilization technology because of their large-area and flexible manufacturing. The absorption rate of sunlight per unit area can be increased by increasing the photovoltaic conversion efficiency or specific surface area of ​​thin-film photovoltaic cells, thereby improving the utilization rate of solar energy in thin-film photovoltaic cells. Methods to increase the specific surface area of ​​thin-film photovoltaic cells include: making texture on th...

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Problems solved by technology

[0004] At present, the preparation methods of CZTS thin film materials mainly include magnetron sputtering, co-evaporation, hybrid sputtering, and electron beam evaporation vulcanization. However, the above-mentioned methods have high manufacturing costs, poor operation convenience, and difficult control of the process flow.

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