Recycling method for waste copper, indium, gallium and selenium materials

Abstract

The invention provides a recycling method for waste copper, indium, gallium and selenium materials. The method comprises the steps that the waste copper, indium, gallium and selenium materials are crushed to obtain copper, indium, gallium and selenium particles; a first sulfuric acid solution and the copper, indium, gallium and selenium particles are mixed according to a first liquid-solid ratio,and heated, oxygen-enriched air is introduced, and first mixed leaching liquid is obtained through primary leaching; strong base and reducing agents are added in the first mixed leaching liquid in sequence, and a gallium acid sodium solution and mixed leaching residues are obtained through secondary leaching; the second gallium acid sodium solution and the mixed leaching residues are mixed according to a second liquid-solid ratio, and heated, oxygen-enriched air is introduced, and second mixed leaching liquid is obtained through third leaching; the second mixed leaching liquid is diluted, deploying reagent is added, and preset electrolyte is obtained; and the preset electrolyte is subjected to electro-deposition, and a copper, indium and selenium film is obtained. The recycling method is simple in process and technology and short in procedure, industrialization is easy to achieved, cost is reduced, and the recycling rate is improved.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to a method for recycling copper indium gallium selenide waste. Background technique [0002] Copper indium gallium selenide (CIGS) thin film solar cells have the advantages of high photoelectric conversion rate, soft material, bendability, and strong hot spot resistance. Therefore, in recent years, the research and development, scale production and application of CIGS thin film solar cells have become the current stage Major trends in solar industry development. Due to the sensitive element ratio and complex multilayer structure of copper indium gallium selenide thin film solar cells, the requirements for its process and preparation conditions are extremely strict, and its production methods mainly include vacuum sputtering, co-evaporation, non-vacuum coating, etc. method, but no matter what kind of production method will produce a large proportion of waste in production. Th...

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