this is the TPT first photovoltaic cell. this is a hi-efficency SINGLE solar cell and it's very tiny (maybe the world's tiniest solar cell)
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oh and in descripion i meant first TRUE solar cell
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well it's very complicated but i can tell you that a photovoltaic cell is made out of P-type silicone and N-type silicone. search on wikipeidia or other websites for (alot) of information
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lol how did u do that?