Oxide thermoelectric materials: A structure-property relationship

Nag, Abanti and Shubha, V (2014) Oxide thermoelectric materials: A structure-property relationship. Journal of Electronic Materials, 43 (4). pp. 962-977. ISSN 1543-186X

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      Abstract

      Recent demand for thermoelectric materials for power harvesting from automobile and industrial waste heat requires oxide materials because of their potential advantages over intermetallic alloys in terms of chemical and thermal stability at high temperatures. Achievement of thermoelectric figure of merit equivalent to unity (ZT �1) for transition-metal oxides necessitates a second look at the fundamental theory on the basis of the structure–property relationship giving rise to electron correlation accompanied by spin fluctuation. Promising transition - metal oxides based on wide-bandgap semiconductors, perovskite and layered oxides have been studied as potential candidate n- and p-type materials. This paper reviews the correlation between the crystal structure and thermoelectric properties of transition-metal oxides. The crystal-site-dependent electronic configuration and spin degeneracy to control the thermopower and electron–phonon interaction leading to polaron hopping to control electrical conductivity is discussed. Crystal structure tailoring leading to phonon scattering at interfaces and nanograin domains to achieve low thermal conductivity is also highlighted.

      Item Type: Journal Article
      Additional Information: Copyright for this article belongs to M/s. Minerals, Metals & Materials Society
      Uncontrolled Keywords: Thermoelectric;Transition-metal oxides;Perovskites; Oxychalcogenides;layered cobalt oxides
      Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
      Division/Department: Materials Science Division, Materials Science Division
      Depositing User: Ms. Alphones Mary
      Date Deposited: 20 Jul 2015 10:28
      Last Modified: 20 Jul 2015 10:28
      URI: http://nal-ir.nal.res.in/id/eprint/12229

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