Co3M2S2 (M ¼ Sn, In) shandites as tellurium-free thermoelectrics

Corps, J., Vaqueiro, P. ORCID: https://orcid.org/0000-0001-7545-6262 and Powell, A. V. (2013) Co3M2S2 (M ¼ Sn, In) shandites as tellurium-free thermoelectrics. Journal of Materials Chemistry A, 1 (22). pp. 6553-6557. ISSN 0959-9428 doi: 10.1039/c3ta11264k

Abstract/Summary

Chemical substitution in Co3Sn2-xInxS2 (0 # x # 2) enables tuning of the Fermi level within narrow bands of Co d-states. This results in a compositionally induced double metal–semiconductor–metal transition and manipulation of the thermoelectric power factor. The maximum power factor (14 mW cm-1 K-2) is found for x ¼ 0.85, which corresponds to ZT z 0.2 at 300 K.