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Achieving Optimum Carrier Concentrations in P-Doped SnS Thermoelectrics

Achieving Optimum Carrier Concentrations in P-Doped SnS Thermoelectrics

Sandip Bhattacharya, N S Harsha Gunda, Robin Stern, Stéphane Jacobs, Radoslaw Chmielowski, Gilles Dennler, Georg K H Madsen

Phys Chem Chem Phys. 2015 Apr 14;17(14):9161-6.

PMID: 25759867

Abstract:

Tin(II)sulfide, SnS, is a commercially viable and environmentally friendly thermoelectric material. Recently it was shown how the carrier concentration and the thermoelectric power factor can be optimized by Ag-doping in a sulphur rich environment. Theoretical calculations lead to a fairly accurate estimation of the carrier concentration, whereas the potential of doping with Li(+) is strongly overestimated. Two principally ubiquitous effects that can result in decreasing the hole concentration, namely the formation of coupled defect complexes and oxidation of the dopant, are discussed as possible origins of this disagreement. It is shown that oxidation limits the chemical potential of Li beyond that already set by the formation of Li2S. This work serves as a comprehensive guide to achieve an efficient p-doped SnS thermoelectric material.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP1314950	Tin(II) sulfide		1314-95-0	Price

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