Amorphous/epitaxial superlattice for thermoelectric application

Amorphous/epitaxial superlattice for thermoelectric application

An amorphous/epitaxial superlattice system is proposed for application to thermoelectric devices, and the superlattice based on a PbGeTeS system was prepared by the alternate deposition of PbS and GeTe using a hot wall epitaxy technique. The structure was analyzed by high-resolution transmission ele...

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Veröffentlicht in:Japanese Journal of Applied Physics 2016-08, Vol.55 (8), p.81201
Hauptverfasser: Ishida, Akihiro, Thao, Hoang Thi Xuan, Shibata, Mamoru, Nakashima, Seisuke, Tatsuoka, Hirokazu, Yamamoto, Hidenari, Kinoshita, Yohei, Ishikiriyama, Mamoru, Nakamura, Yoshiaki
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container_issue 8
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container_title Japanese Journal of Applied Physics
container_volume 55
creator Ishida, Akihiro
Thao, Hoang Thi Xuan
Shibata, Mamoru
Nakashima, Seisuke
Tatsuoka, Hirokazu
Yamamoto, Hidenari
Kinoshita, Yohei
Ishikiriyama, Mamoru
Nakamura, Yoshiaki
description An amorphous/epitaxial superlattice system is proposed for application to thermoelectric devices, and the superlattice based on a PbGeTeS system was prepared by the alternate deposition of PbS and GeTe using a hot wall epitaxy technique. The structure was analyzed by high-resolution transmission electron microscopy (HRTEM) and X-ray analysis, and it was found that the superlattice consists of an epitaxial PbTe-based layer and a GeS-based amorphous layer by the reconstruction of the constituents. A reduction in thermal conductivity due to the amorphous/epitaxial system was confirmed by a 2ω method. Electrical and thermoelectric properties were measured for the samples.
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title Amorphous/epitaxial superlattice for thermoelectric application
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