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Characterization of a n+3C/n-4H SiC heterojunction diode
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- Minamisawa, R. A. (author)
- ABB Corp Research Centre, Switzerland
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- Mihaila, A. (author)
- ABB Corp Research Centre, Switzerland
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- Farkas, Ildiko (author)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- American Institute of Physics (AIP), 2016
- 2016
- English.
- In: Applied Physics Letters. - : American Institute of Physics (AIP). - 0003-6951 .- 1077-3118. ; 108:14, s. 143502-
- Journal article (peer-reviewed)
Abstract
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- We report on the fabrication of n+3C/n-4H SiC heterojunction diodes (HJDs) potentially promising the ultimate thermal stability of the junction. The diodes were systematically analyzed by TEM, X-ray diffraction, AFM, and secondary ion mass spectroscopy, indicating the formation of epitaxial 3C-SiC crystal on top of 4H-SiC substrate with continuous interface, low surface roughness, and up to similar to 7 x 10(17) cm(-3) dopant impurity concentration. The conduction band off-set is about 1 V as extracted from CV measurements, while the valence bands of both SiC polytypes are aligned. The HJDs feature opening voltage of 1.65 V, consistent with the barrier height of about 1.5 eV extracted from CV measurement. We finally compare the electrical results of the n+3C/n-4H SiC heterojunction diodes with those featuring Si and Ge doped anodes in order to evaluate current challenges involved in the fabrication of such devices. (C) 2016 AIP Publishing LLC.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
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- ref (subject category)
- art (subject category)
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- Janzén, Erik
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