Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/2214
Title: High performance thermoelectric materials and devices based on GeTe
Authors: Perumal, Suresh
Roychowdhury, Subhajit
Biswas, Kanishka
Keywords: Materials Science
Physics
Germanium Antimony Tellurides
Valence-Band Convergence
Phase-Change Materials
System Pbte-Gete
Thermal-Conductivity
Mechanical-Properties
Bulk Thermoelectrics
Optical-Properties
Crystal-Structure
Power-Generation
Issue Date: 2016
Publisher: Royal Society of Chemistry
Citation: Perumal, S.; Roychowdhury, S.; Biswas, K., High performance thermoelectric materials and devices based on GeTe. Journal of Materials Chemistry C 2016, 4 (32), 7520-7536 http://dx.doi.org/10.1039/c6tc02501c
Journal of Materials Chemistry C
4
32
Abstract: Thermoelectric materials have received recent attention due to their ability to convert waste heat to electrical energy directly and reversibly. Inorganic materials, especially Bi2Te3, PbTe and Si-Ge based alloys, have been investigated in the temperature range of 300-1000 K, among which PbTe based materials have been extensively studied, and reported to be the leading thermoelectric materials for mid-temperature power generation. However, environmental concern limits their large scale production due to the toxic nature of Pb. As an alternative, GeTe-rich alloys such as TAGS (GeTe-AgSbTe2) have been largely investigated since the 1960s. Most recently, some of the new materials in the GeTe family have been introduced such as Ge0.87Pb0.13Te, the homologous series of Sb2Te3(GeTe)(n) and Ge0.9Sb0.1Te, and are reported to exhibit high thermoelectric performance, inherently formed nano and microstructure modulations, and high thermal and mechanical stability. These collective enhanced properties of GeTe-rich alloys have generated great interest in investigating further new GeTe based alloys for intermediate temperature thermoelectric applications. In order to provide the fundamental understanding, technological insights, and to further promote the GeTe based alloys, we hereby present a review on (i) the crystal structure, nano/microstructure, phase transition, electronic structure, and thermoelectric properties of GeTe, (ii) correlation of compositional and microstructure modulations and thermoelectric properties of doped GeTe, TAGS based alloys, Ge-Pb-Te materials, and Ge-Sb-Te materials, (iii) mechanical properties, (iv) past and present devices based on GeTe materials and (v) future directions.
Description: Restricted Access
URI: http://hdl.handle.net/10572/2214
ISSN: 2050-7526
Appears in Collections:Research Papers (Kaniska Biswas)

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