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Title: Thermoelectric properties of indium doped PbTe{sub 1-y}Se{sub y} alloys

Lead telluride and its alloys are well known for their thermoelectric applications. Here, a systematic study of PbTe{sub 1-y}Se{sub y} alloys doped with indium has been done. The powder X-Ray diffraction combined with Rietveld analysis confirmed the polycrystalline single phase nature of the samples, while microstructural analysis with scanning electron microscope results showed densification of samples and presence of micrometer sized particles. The temperature dependent transport properties showed that in these alloys, indium neither pinned the Fermi level as it does in PbTe, nor acted as a resonant dopant as in SnTe. At high temperatures, bipolar effect was observed which restricted the zT to 0.66 at 800‚ÄČK for the sample with 30% Se content.
Authors:
;  [1] ; ;  [2]
  1. Thermoelectric Materials and Devices Laboratory, Department of Physics, Indian Institute of Science, Bangalore 560012, Karnataka (India)
  2. Department of Materials Science, California Institute of Technology, Pasadena, California 91125 (United States)
Publication Date:
OSTI Identifier:
22308475
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DOPED MATERIALS; FERMI LEVEL; INDIUM ADDITIONS; LEAD COMPOUNDS; MICROSTRUCTURE; POLYCRYSTALS; POWDERS; SCANNING ELECTRON MICROSCOPY; SELENIUM COMPOUNDS; TELLURIUM COMPOUNDS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0400-1000 K; TERNARY ALLOY SYSTEMS; THERMOELECTRIC PROPERTIES; X-RAY DIFFRACTION