For some time. the chalcopyrite semiconductor CuInSe2 and its alloy with Ga and/or S [Cu(InGa)Se2 or Cu(InGa)(Se. S)2]. commonly referred as CIGS. https://danddcollectiblers.shop/product-category/gastrointestinal-health/
Progress in Polycrystalline Thin-Film Cu(In,Ga)Se2 Solar Cells
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