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

doi:10.1063/1.4941934

AIP Advances (Feb 2016)

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

Affiliations

Bahadir Kucukgok: Lyles School of Civil Engineering, Purdue University, West Lafayette, IN 47907, USA
Xuewang Wu: Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
Xiaojia Wang: Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
Zhiqiang Liu: Institute of Semiconductors, Chinese Academy of Science, Beijing, China
Ian T. Ferguson: College of Engineering and Computing, Missouri University of Science and Technology, Rolla, MO 65409, USA
Na Lu: Lyles School of Civil Engineering, Purdue University, West Lafayette, IN 47907, USA

DOI: https://doi.org/10.1063/1.4941934
Journal volume & issue: Vol. 6, no. 2
pp. 025305 – 025305-7

Abstract

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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.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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