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The team’s purified tin selenide in polycrystalline form could lead to affordable devices that convert heat waste into electricity. (Image Credit: Northwestern University)   Scientists from Northwestern University and Seoul National University recently found a way to convert heat into electricity through a purified tin selenide in polycrystalline form, an inexpensive solution. The thermoelectric material outperforms the single-crystal form, making it the most efficient system to date ...

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