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Title: | Drastic increase in thermoelectric power factor of mixed Sb2Te3-In2Te3 thin films |
Authors: | Vallem, S. Bangera, K.V. G.K., S. |
Issue Date: | 2019 |
Citation: | Superlattices and Microstructures, 2019, Vol.131, , pp.15-20 |
Abstract: | Thermoelectric power factor is an indicator of the performance of a thermoelectric material. Attempts have been made by various techniques, like doping, to improve the thermoelectric conversion efficiency of materials. In the present study, a layer structured thermoelectric material Sb2Te3 is alloyed to In2Te3 using vacuum deposition method at 423 K to significantly enhance the power factor of ?118 ?Wm-1K?2 (at 450 K). Structurally, all films were polycrystalline in nature as clearly reflected in XRD patterns. All films were showing p-type conductivity, and electrical conductivity of In2Te3 films increased with increasing Sb2Te3 content. The seebeck coefficient is found to be higher for un-doped In2Te3 than that of Sb2Te3-In2Te3 and pure Sb2Te3 films. However, the thermoelectric power factor of 25% Sb2Te3 alloyed In2Te3 films is enhanced by 11.9 times that of In2Te3 films and 4 times that of Sb2Te3 films at 320 K. It is interesting to note that efficiency of the mixed films is higher than that of the individual films. 2019 Elsevier Ltd |
URI: | http://idr.nitk.ac.in/jspui/handle/123456789/10636 |
Appears in Collections: | 1. Journal Articles |
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