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We present that earth-abundant and environmentally friendly SnS is a promising thermoelectric material due to its high ZT of 0.6 despite its relatively wide band gap of 1.2 eV. Ag doping significantly improved electrical conductivity but maintained the Seebeck coefficient above 400 μV K−1 and the thermal conductivity below 0.45 W m−1 K−1 at 873 K.
Tan et al. (Wed,) studied this question.