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Title: Depth-resolved luminescence imaging of epitaxial lateral overgrown GaN using ionoluminescence
Authors: Teo, E.J. 
Bettiol, A.A. 
Osipowicz, T. 
Hao, M.
Chua, S.J. 
Liu, Y.Y. 
Keywords: A1. Cathodoluminescence
A1. Depth-resolved
A1. Ionoluminescence
B1. Epitaxial lateral overgrown GaN
Issue Date: 1-Aug-2004
Citation: Teo, E.J., Bettiol, A.A., Osipowicz, T., Hao, M., Chua, S.J., Liu, Y.Y. (2004-08-01). Depth-resolved luminescence imaging of epitaxial lateral overgrown GaN using ionoluminescence. Journal of Crystal Growth 268 (3-4 SPEC. ISS.) : 494-498. ScholarBank@NUS Repository.
Abstract: In this article, we utilize energetic mega-electron-volt (MeV) H + to excite light emission from epitaxial lateral overgrown GaN. Due to the high-penetration depth of MeV ions, this technique allows us to probe several microns below the surface, down to the interface region. Spatially and depth-resolved yellow luminescence imaging is carried out using a focused H + beam with energies of 0.5, 0.75 and 1MeV. Results show an increase of the yellow luminescence with depth in the window regions with respect to the wing regions. Since the threading dislocations propagate to the surface, this suggests that the yellow luminescence is due to the point defects rather than threading dislocations. © 2004 Elsevier B.V. All rights reserved.
Source Title: Journal of Crystal Growth
ISSN: 00220248
DOI: 10.1016/j.jcrysgro.2004.04.079
Appears in Collections:Staff Publications

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