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S5: Unconventional Thermoelectrics: Defect Chemistry, Doping and Nanoscale Effects


EMA 2012


In order to be useful, widespread energy scavenging materials, thermoelectrics must be composed of nontoxic and abundant elements, be stable in air to high temperatures, and display simultaneous large thermopower and low thermal conductivity. A wide variety of ceramic science may be applied to control conductivity and to decrease phonon-related thermal transport. Nanostructuring approaches have been adopted in traditional selenide and telluride thermoelectric materials, and are now being extended to novel thermoelectrics. Methods including nanoscale grains, embedded nanoinclusions, interfacial nanocoatings, and lamellar/multilayer structuring have all been utilized for significant thermoelectric property improvements. Similar efforts have recently been proposed for oxide materials, where control of oxygen vacancies, crystal chemistry, and electronically compensating charge carriers have led to ZT values exceeding 0.7. This symposium is a forum for discussing defect chemistry, conductivity, thermal conductivity optimization and applications for novel thermoelectrics.


Proposed Session Topics

  • Theory and applications
  • Thermoelectric silicides
  • Thermoelectric oxides
  • Novel materials
  • Low dimensional materials and crystal chemistry approaches
  • Nanoscale scattering effects
  • Thermophotovoltaics and emerging thermal devices

Symposium Organizers

  • Alp Sehirlioglu, Case Western Reserve Univ
  • Jon Ihlefeld, Sandia National Labs
  • Anke Weidenkaff, EMPA

Point of Contact

Alp Sehirlioglu, Phone: +1 (216) 433-6159



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