Synthesis and Thermoelectric Properties of C60Cu2GeSe3 Composites

Abstract EN

Nanosized C60 powder was sufficiently incorporated with Cu2GeSe3 powder by ball milling and C60/Cu2GeSe3 composites were prepared by spark plasma sintering.

C60 distributed uniformly in the form of clusters and the average size of cluster was lower than 1 μm.

With the addition of C60 increasing, the electrical resistivity and Seebeck coefficient of C60/Cu2GeSe3 composites increased while the thermal conductivity decreased significantly which resulted from the phonon scattering by C60 clusters locating on the grain boundaries of Cu2GeSe3 matrix.

The maximum ZT of 0.20 was achieved at 700 K for 0.9% C60/Cu2GeSe3 sample.