A method of improving the thermoelectric figure of merit (ZT) of a high-efficiency thermoelectric material is disclosed. The method includes the addition of fullerene (C60) clusters between the crystal grains of the material. It has been found that the lattice thermal conductivity (κL) of a thermoelectric material decreases with increasing fullerene concentration, due to enhanced phonon-large defect scattering. The resulting power factor (S2/ρ) decrease of the material is offset by the lattice thermal conductivity reduction, leading to enhanced ZT values at temperatures of between 350 degrees K and 700 degrees K.
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机译:公开了一种改善高效热电材料的热电品质因数(ZT)的方法。该方法包括在材料的晶粒之间添加富勒烯(C 60 Sub>)簇。已经发现,由于增强的声子-大缺陷散射,热电材料的晶格热导率(κ L Sub>)随着富勒烯浓度的增加而降低。材料导致的功率因数(S 2 Sup> /ρ)的降低被晶格热导率的降低所抵消,从而导致温度在350度至700度之间的ZT值提高。
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