Flexible thin film solar cell and production method thereof

Abstract

The invention discloses a flexible thin film solar cell and a production method thereof. The thin film solar cell provided by the invention is prepared from polyacidamide, a molybdenum back electrode, a copper-indium-aluminum-selenium light absorption layer, a zinc sulfide buffer layer, a zinc-aluminum oxide window layer and a nickel-aluminum top electrode successively from bottom to top. The invention also discloses a preparation method of the flexible thin film solar cell, which comprises the following steps: 1) depositing the molybdenum back electrode of 0.3-3.0 mu m on the polyacidamide substrate by adopting a direct current magnetic control sputtering method; 2) depositing a copper-indium-aluminum-selenium thin film of 0.5-5.0 mu m on the molybdenum back electrode by adopting a sputtering selenization method; 3) growing a zinc sulfide thin film on the copper-indium-aluminum-selenium thin film by adopting a radio frequency reaction sputtering method; 4) growing a zinc-aluminum oxide thin film on the zinc sulfide thin film by adopting the direct current magnetic control sputtering method; and 5) depositing a nickel-aluminum alloy thin film though a masking film by adopting an evaporation method. The invention greatly reduces the use of rare metals and toxic elements and has the advantages of simple structure and production process, high photoelectric conversion efficiency, good stability and the like.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials and new energy sources, and in particular relates to a flexible thin-film solar cell and a manufacturing method thereof. Background technique [0002] Among the various utilization methods of solar energy, solar cell power generation is the fastest growing, most dynamic and most eye-catching field, and it is expected to become an effective way to solve the increasingly serious energy crisis and environmental pollution problems. The solar cell industry has entered a stage of rapid development since the second half of the 1990s. The average annual growth rate of solar cells in the last 10 years was 41.3%, and the average annual growth rate in the last 5 years was 49.5%. Although the development speed is so fast, the proportion of solar cell power generation in the entire social energy structure is still very small, less than 1%. Therefore, the development potential of solar cells is...

AI Technical Summary

Problems solved by technology

[0004] Among various thin-film solar cells, although the cost of amorphous silicon thin-film solar cells is low, the efficiency is also low, and the light decay effect is difficult to solve; although the cost of dye-sensitized solar cells is low, due to the use of liquid electrolytes and organic dyes , making it difficult to manufacture and package, and the efficiency is unstable. Although the efficiency of cadmium telluride solar cells can meet the requirements, it needs to use the rare element tellurium, and also contains the highly toxic heavy metal element cadmium. Copper indium gallium selenide thin film solar cells are environmentally friendly and low in cost. and excellent performance, but due to the use of indium and gallium, its development prospects are not optimistic. How to avoid and reduce the use of these rare metals is one of the topics with very useful scenarios.

[0005] The traditional inorganic thin-film semiconductor solar cell structure uses rigid materials such as soda-lime glass as the substrate, which limits the large-area deposition of each layer of thin-film materials, and also limits the field of use of the battery

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