The structural properties of InGaN alloys and the interdependence on the thermoelectric behavior

Bahadir Kucukgok, Xuewang Wu, Xiaojia Wang, Zhiqiang Liu, Ian T. Ferguson, Na Lu

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The III-Nitrides are promising candidate for high efficiency thermoelectric (TE) materials and devices due to their unique features which includes high thermal stability. A systematic study of the room temperature TE properties of metalorganic chemical vapor deposition grown InxGa1-xN were investigated for x = 0.07 to 0.24. This paper investigated the role of indium composition on the TE properties of InGaN alloys in particular the structural properties for homogenous material that did not show significant phase separation. The highest Seebeck and power factor values of 507 μV K-1 and 21.84 × 10-4 Wm-1K-1 were observed, respectively for In0.07Ga0.93N at room temperature. The highest value of figure-of-merit (ZT) was calculated to be 0.072 for In0.20Ga0.80N alloy at room temperature.

Original languageEnglish (US)
Article number025305
JournalAIP Advances
Issue number2
StatePublished - Feb 2016

Bibliographical note

Funding Information:
This research is supported by National Science Foundation under Faculty Early Career Development Program (CMMI- 1351817). X. W and X. W. would like to thank the support from the National Science Foundation through the University of Minnesota MRSEC under Award Number DMR-1420013.

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© 2016 Author(s).

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