• power factor characterization of ge/sige thermoelectric superlattices at 300 k

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 854
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
      to accurately characterize the efficiency of thermoelectric materials and characterize the maximum power that they can produce, a device using micro/nanofabrication techniques has been developed, enabling all three properties included in the figure of merit, zt, of a thermoelectric material to be measured using a single device. the fabrication and testing of the device are presented. the electrical conductivity and seebeck coefficient of ge/sige heterostructures grown by low-energy plasma-enhanced chemical vapor deposition are used for demonstration. experimental results as a function of quantum well width are presented, demonstrating power factors up to 6.02 ± 0.05 mw m−1 k−2 at 300 k. modeling and physical characterization demonstrate that these results are presently limited by high threading dislocation density.

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