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Effects of excitation density on cathodoluminescence from GaN

Kucheyev, S. O.; Toth, M.; Phillips, M. R.; Williams, J. S.; Jagadish, C.


Wurtzite GaN epilayers are studied by cathodoluminescence(CL)spectroscopy. Results show that the intensities of donor–acceptor pair (DAP) and yellow luminescence (YL) peaks sublinearly depend on excitation density, presumably, due to saturation effects. The intensity of near-gap emission, however, exhibits a superlinear dependence on electron-beam excitation. In contrast to photoluminescence measurements, CL studies of GaN are usually performed in a regime with a strongly nonlinear dependence...[Show more]

CollectionsANU Research Publications
Date published: 2001-10-01
Type: Journal article
Source: Applied Physics Letters
DOI: 10.1063/1.1408273


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