ZnTe Alloying Effect on Enhanced Thermoelectric Properties of p-Type PbTe
Source abstract
Abstract
We investigate the effect of ZnTe incorporation on PbTe to enhance thermoelectric performance. We report structural, microscopic, and spectroscopic characterizations, ab initio theoretical calculations, and thermoelectric transport properties of Pb 0.985 Na 0.015 Te– x % ZnTe ( x = 0, 1, 2, 4). We find that the solid solubility limit of ZnTe in PbTe is less than 1 mol %. The introduction of 2% ZnTe in p-type Pb 0.985 Na 0.015 Te reduces the lattice thermal conductivity through the ZnTe precipitates at the microscale. Consequently, a maximum thermoelectric figure of merit ( ZT ) of 1.73 at 700 K is achieved for the spark plasma-sintered Pb 0.985 Na 0.015 Te–2% ZnTe, which arises from a decreased lattice thermal conductivity of ∼0.69 W m –1 K –1 at ∼700 K in comparison with Pb 0.985 Na 0.015 Te.
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Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Chalcogenide Semiconductor Thin Films · Thermal Radiation and Cooling Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
Thin Film Materials Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
Advanced Materials and Devices Laboratory, Korea Institute of Energy Research, Daejeon 34129, Republic of Korea
Funding
Korea Institute of Energy Research · National Research Foundation of Korea
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