High-Temperature Thermoelectric Measurement of B-Doped SiGe and Si Thin Films

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  • Shin Woosuck
    Advanced Manufacturing Research Institute, Sensor Integration Group, National Institute of Advanced Industrial Science and Technology (AIST)
  • Ishikawa Masahiko
    Advanced Manufacturing Research Institute, Sensor Integration Group, National Institute of Advanced Industrial Science and Technology (AIST)
  • Nishibori Maiko
    Advanced Manufacturing Research Institute, Sensor Integration Group, National Institute of Advanced Industrial Science and Technology (AIST)
  • Izu Noriya
    Advanced Manufacturing Research Institute, Sensor Integration Group, National Institute of Advanced Industrial Science and Technology (AIST)
  • Itoh Toshio
    Advanced Manufacturing Research Institute, Sensor Integration Group, National Institute of Advanced Industrial Science and Technology (AIST)
  • Matsubara Ichiro
    Advanced Manufacturing Research Institute, Sensor Integration Group, National Institute of Advanced Industrial Science and Technology (AIST)

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Abstract

Recent progress of thin-film type thermoelectric, TE, materials accelerates new microdevices working at room temperature to high temperature, and also requires the measurement techniques for the films. Modified four point pressure contact electrodes have been developed in this study, applied for the high temperature measurement of the resistivity and Seebeck coefficient of the boron-doped Si0.8Ge0.2 and Si thin films. The films were prepared by chemical vapor deposition method and then annealed at high temperature of 1050°C, and their Seebeck coefficients were investigated with two different measurement systems, block heating or air cooling electrodes, from 80 to 780°C. For this temperature range, the Seebeck coefficients of the boron-doped Si0.8Ge0.2 film and boron-doped Si film were 150∼350 μV/K and 100∼250 μV/K, respectively. The deviation of Seebeck coefficient was investigated with various measurement parameter, and the optimized temperature difference for the reliable measurement was found to be 2.2°C.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 50 (7), 1596-1602, 2009

    The Japan Institute of Metals and Materials

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