Imagine solar panels that are feather-light and wallet-friendly. Silicon thin-film solar cells do just that, using super-thin layers of amorphous or microcrystalline silicon (only 0.5 µm thick) deposited on bendy substrates like glass, metal, or plastic. They capture about 90% of the sun's usable light, slashing material needs compared to traditional crystalline silicon's hefty 200...
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