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Simultaneous composition mapping and hyperspectral cathodoluminescence imaging of InGaN epilayers

Edwards, P.R. and Martin, R.W. and O'Donnell, K.P. and Watson, I.M. (2003) Simultaneous composition mapping and hyperspectral cathodoluminescence imaging of InGaN epilayers. Physica Status Solidi C (7). pp. 2474-2477. ISSN 1862-6351

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Abstract

Gallium nitride based structures have been characterised using the novel approach of simultaneous wavelength-dispersive X-ray microanalysis and cathodoluminescence spectral mapping (or hyperspectral imaging). Details are presented of the instrumentation developed to carry out such measurements. Application of the technique to MOVPE-grown indium gallium nitride epilayers shows microscopic variations in the indium content, which correlate directly with spatially-dependent shifts observed in the peak wavelength of the luminescence spectrum. Regions of higher indium content are shown to emit at lower energy and with decreased intensity, mirroring equivalent macroscopic observations.

Item type: Article
ID code: 9988
Keywords: Gallium Nitride , cathodoluminescence , spectral mapping, luminescence spectrum, Physics, Condensed Matter Physics
Subjects: Science > Physics
Department: Faculty of Science > Physics
Faculty of Science > Institute of Photonics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 27 Jul 2011 11:44
    Last modified: 04 Sep 2014 19:16
    URI: http://strathprints.strath.ac.uk/id/eprint/9988

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