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High Thermoelectric Performance in Non-Toxic Earth-Abundant Copper Sulfide

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Abstract

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A new type of high performance thermoelectric material Cu2-xS composed of non-toxic and earth-abundant elements Cu and S is reported. Cu2-xS surprisingly has lower thermal conductivity and more strikingly reduced specific heat compared to the heavier Cu2Se, leading to an increased zT to 1.7.

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