Influence of nanoscale Ag2Te precipitates on the thermoelectric properties of the Sn doped P-type AgSbTe2 compound
Source abstract
Abstract
We report a maximal figure of merit (ZT) value of 1.1 at 600 K was obtained for the sample of which x = 0.03, representing an enhancement greater than 20% compared with a pristine AgSbTe2 sample. This favorable thermoelectric performance originated from the optimal Sn2+ substitution for Sb3+ in AgSbTe2, which not only increased electrical conductivity but also led to a substantial reduction in thermal conductivity that was likely caused by an enhanced phonon-scattering mechanism through the combined effects of lattice defects and the presence of Ag2Te nanoprecipitates dispersed in the matrix.
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Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
National Tsing Hua University 1 Department of Engineering and System Science, , Hsinchu, Taiwan
Academia Sinica 2 Institute of Physics, , Taipei, Taiwan
Academia Sinica 3 Nano Science and Technology, Taiwan International Graduate Program, Institute of Physics, , Taipei, Taiwan
National Taiwan University 4 Center for Condensed Matter Sciences, , Taipei, Taiwan
Academia Sinica 5 Institute of Earth Sciences, , Taipei, Taiwan
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28. See supplementary material at http://dx.doi.org/10.1063/1.4896435 for details about the site occupancy, EPMA images, nH graph, calculation of effective mass (m*), Cp graph, thermal stability of AgSb0.97Sn0.03Te2 sample.