Title

Enhanced thermoelectric efficiency of Cu2-xSe-Cu2S composite by incorporating Cu2S nanoparticles

RIS ID

105700

Publication Details

Farooq, M. U., Butt, S., Gao, K., Sun, X., Pang, X., Khan, S. U., Xu, W., Mohmed, F., Mahmood, A. & Mahmood, N. (2016). Enhanced thermoelectric efficiency of Cu2-xSe-Cu2S composite by incorporating Cu2S nanoparticles. Ceramics International, 42 (7), 8395-8401.

Abstract

The study of thermoelectric transport properties in Cu2-x Se and Cu2S has gained an importance in the thermoelectric research during last few years due to their superionic behavior and low cost. Here, we reported a facile method to enhance the thermoelectric efficiency of Cu2-x Se by introducing Cu2S nanoparticles (NPs) in the matrix of Cu2-x Se. The observed efficiency is a direct result of simultaneous improvement of Seebeck coefficient (S) because of the external strain induced by Cu2S nanoinclusions in Cu2-x Se and decline in the total thermal conductivity by suppressing both electronic and lattice thermal contributions. Such higher S and lower thermal conductivity is realized for a composite structure with 10wt% nanoinclusions of Cu2S which effectively contributed to higher ZT value of 0.90 at moderate temperature of 773K. Thus, it is believed that the proposed hybrid structure is a promising p-type thermoelectric material for mid-temperature range energy harvesting applications.

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Link to publisher version (DOI)

http://dx.doi.org/10.1016/j.ceramint.2016.02.055