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Cross-sectional and plan-view cathodoluminescence of GaN partially coalesced above a nanocolumn array
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10.1063/1.4737418
/content/aip/journal/jap/112/2/10.1063/1.4737418
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/2/10.1063/1.4737418
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Plan-view and (b) cross-sectional SEM images of the partially coalesced GaN nanocolumns.

Image of FIG. 2.
FIG. 2.

(a) Secondary electron image of the partially coalesced GaN layer, (b) plan-view integrated intensity CL map from the partially coalesced GaN nanocolumns layer, (c) mean CL spectrum from the mapped region.

Image of FIG. 3.
FIG. 3.

The CL maps showing the distribution of peak intensity, center energy, and line width for the bandedge (a, b, and c, respectively) and DAP emission (d, e, and f, respectively).

Image of FIG. 4.
FIG. 4.

The CL peak energy map of GaN NBE emission overlaid on the corresponding secondary electron image.

Image of FIG. 5.
FIG. 5.

(a) SE image showing the mapped region in a box, (b) cross-sectional CL integrated intensity map, (c) mean spectrum from the cross-section CL map, (d) line spectrum corresponding to CL line scan analysis.

Image of FIG. 6.
FIG. 6.

Comparison of the spectra and FWHM of averaged line spectra from the nanocolumn layer and the top partially coalesced layer.

Image of FIG. 7.
FIG. 7.

(a) FWHM and (b) wavelength variation of the NBE emission as the electron beam scans from the nanocolumn layer to the top of the partially coalesced layer. The lines are guides to the eye.

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/content/aip/journal/jap/112/2/10.1063/1.4737418
2012-07-19
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Cross-sectional and plan-view cathodoluminescence of GaN partially coalesced above a nanocolumn array
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/2/10.1063/1.4737418
10.1063/1.4737418
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