Answer
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Thin-film CdTe (cadmium telluride) panels are made from cadmium which is a waste product from mining industry but is highly toxic and it must be recycled. Because of its toxicity, some countries in Europe have banned CdTe panels. Also because of toxicity and lower efficiency than crystalline silicon panels, these are not used in rooftop solar, as it can also become a health hazard.
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First Solar, has also setup a 3 GW manufacturing plant in India for domestic and exports market, it is also enlisted in ALMM to be able to sell to domestic IPPs. However, because of limitations of CdTe and technology only with 1 player, we believe Indian manufacturing capacity will be dominated by crystalline silicon
R&D is happening to add certain chemicals and additive to the process and success in same could lead to addressing of above concerns.
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