"Microstructure of vanadium-based contacts on n-type GaN" by S. Pookpanratana

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Article

Microstructure of vanadium-based contacts on n-type GaN

Journal of Physics D: Applied Physics (2012)

S. Pookpanratana
Sean R Mulcahy
R. France
R. Félix
R. Wilks
L. Weinhardt
T. Hofmann
L. Tati Bismaths
F. Kronast
T. D. Moustakas
M. Bär
C. Heske

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Abstract

Atomic force microscopy, wavelength-dispersive x-ray spectroscopy and photoemission electron microscopy were used to study the contact formation of Au/V/Al/V-based contacts on n-type GaN. After a rapid thermal annealing contact formation step, we find that the surface is composed of dendritic structures. The dendrites are Au-rich, while the voids between the branches of the dendrites are V-rich, and cracks in the voids are Ga-rich. A detailed model of the chemical structure and morphology of V-based contacts on n-GaN is given and discussed in view of the ohmic-like behaviour of such contacts.

Keywords

Vanadium-based contacts,
n-type GaN

Disciplines

Geochemistry and
Geology

Publication Date

February, 2012

DOI

https://doi.org/10.1088/0022-3727/45/10/105401

Publisher Statement

Citation Information

S Pookpanratana et al 2012 J. Phys. D: Appl. Phys. 45 105401