Method for recycling gallium, indium and germanium from wasted thin-film solar cells

A technology for solar cells and thin films, applied in the field of recycling gallium, indium, and germanium, can solve the problems of inhibiting the recycling of waste thin-film solar cells, low efficiency, complicated processes, etc., and achieve the effects of reducing recycling costs, improving recycling efficiency, and simple process.
CN103199148AActive Publication Date: 2013-07-10GEM CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GEM CO LTD
Publication Date
2013-07-10

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Abstract

The invention provides a method for recycling gallium, indium and germanium from wasted thin-film solar cells. The method includes the steps: obtaining first separation liquid containing metal ions of the gallium, the indium, the germanium, cadmium, copper, tin and zinc; obtaining second separation liquid; obtaining filter residues containing the gallium, the indium, the germanium and the tin; obtaining fourth separation liquid and an indium and germanium metal solid which is not dissolved in a lye solution; conducting the steps of recycling gallium metal; conducting the steps of recycling indium metal; and conducting the steps of recycling germanium metal. According to the method for recycling the gallium, the indium and the germanium from the wasted thin-film solar cells, various dissipated metal such as the gallium, the indium and the germanium can be respectively recycled step by step, recycling cost can be effectively reduced, the recycling efficiency is improved, and the method is simple in process and is suitable for industrial production. In addition, through the method for recycling the gallium, the indium and the germanium from the wasted thin-film solar cells, the various dissipated metal such as the gallium, the indium and the germanium is high in purity, and the purity can reach up to 99.99%.
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Description

technical field

[0001] The invention relates to a method for recovering gallium, indium and germanium from waste thin film solar cells. Background technique

[0002] Thin-film solar cell is a kind of solar cell. Its main components are silicon dioxide, aluminum, silicon, polymer, zinc, and also contain some heavy metals such as arsenic and cadmium and scattered metals such as gallium, indium and germanium. Due to its good flexibility, the thin-film solar cell can be combined with buildings or become a part of the building body. It is widely used and has a large annual output, but there are also many waste thin-film solar cells every year. If the The waste thin-film solar cells are directly discarded, and the scattered metals such as gallium, indium, germanium and toxic elements such as arsenic and cadmium contained therein will cause harm to the environment and are a waste of resources. In particular, the non-renewability of gallium, indium, and germanium scattered metals m...

Claims

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