Enhanced thermoelectric performance of Pb doped Cu2SnSe3 synthesized employing spark plasma sintering

Shyam Prasad, K and Rao, Ashok and Tyagi, Kriti and Chauhan, Narendra Singh (2017) Enhanced thermoelectric performance of Pb doped Cu2SnSe3 synthesized employing spark plasma sintering. Physica B: Condensed Matter, 512 (1). pp. 39-44. ISSN 09214526

[img] PDF
2477.pdf - Published Version
Restricted to Registered users only

Download (1MB) | Request a copy
Official URL: http://www.sciencedirect.com/science/article/pii/S...


We report an enhancement in the thermoelectric performance of Cu2SnSe3 alloy on Pb doping, owing to a sharp increase in its power factor. The powder XRD pattern of all samples of Cu2Sn1−xPbxSe3 (0≤x≤0.03), prepared using solid state reaction, exhibited a cubic structure with a space group of F43m. The results show that temperature dependent electrical resistivity, ρ(T) increases with increasing temperature thereby demonstrating that the samples display heavily doped semiconducting nature, which could be satisfactorily described by small polaron hopping model in the whole temperature range of measurement for all the samples. Both the resistivity and the Seebeck coefficient are reduced with 2 vol% Pb doping. The thermal conductivity of all the samples reduces with increasing temperature. Despite a decrease in Seebeck coefficient the power factor shows an increase on Pb doping, owing to a sharp surge in the electrical conductivity which results in an enhanced ZTmax ~0.64 at 700 K for an optimized composition of Cu2Sn0.98Pb0.02Se3, which is nearly twice the value of the corresponding undoped counterpart.

Item Type: Article
Uncontrolled Keywords: Thermoelectrics Electrical resistivity Seebeck coefficient Thermal conductivity Power factor Figure
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 02 May 2017 11:09
Last Modified: 02 May 2017 11:09
URI: http://eprints.manipal.edu/id/eprint/148798

Actions (login required)

View Item View Item