Thermoelectric energy conversion in layered structures with strained Ge quantum dots grown on Si surfaces

  • Oleg Korotchenkov
  • Andriy Nadtochiy
  • Vasyl Kuryliuk
  • Chin-Chi Wang
  • Pei-Wen Li
  • Andres Cantarero
Regular Article


The efficiency of the energy conversion devices depends in many ways on the materials used and various emerging cost-effective nanomaterials have promised huge potentials in highly efficient energy conversion. Here we show that thermoelectric voltage can be enhanced by a factor of 3 using layer-cake growth of Ge quantum dots through thermal oxidation of SiGe layers stacked in SiO2/Si3N4 multilayer structure. The key to achieving this behavior has been to strain the Ge/Si interface by Ge dots migrating to Si substrate. Calculations taking into account the carrier trapping in the dot with a quantum transmission into the neighboring dot show satisfactory agreement with experiments above ≈200 K. The results may be of interest for improving the functionality of thermoelectric devices based on Ge/Si.


Mesoscopic and Nanoscale Systems 


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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Oleg Korotchenkov
    • 1
    • 2
  • Andriy Nadtochiy
    • 2
  • Vasyl Kuryliuk
    • 2
  • Chin-Chi Wang
    • 3
  • Pei-Wen Li
    • 3
  • Andres Cantarero
    • 1
  1. 1.Materials Science Institute, University of ValenciaValenciaSpain
  2. 2.Department of PhysicsTaras Shevchenko National University of KyivKyivUkraine
  3. 3.Department of Electrical Engineering and the Center for Nano Science and TechnologyNational Central UniversityChungLiTaiwan

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