Ya. V. Kuznetsova, V. N. Zhmerik, D. V. Nechaev, A. M. Kuznetsov, M. V. Zamoryanskaya, “Specific features of the cathodoluminescence spectra of AlInGaN QWs, caused by the influence of phase separation and internal electric fields”, Fizika i Tekhnika Poluprovodnikov, 2016, Volume 50, Issue 7,Pages <nobr>921

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Semiconductor structures, low-dimensional systems, quantum phenomena

Specific features of the cathodoluminescence spectra of AlInGaN QWs, caused by the influence of phase separation and internal electric fields

Ya. V. Kuznetsova^a, V. N. Zhmerik^a, D. V. Nechaev^a, A. M. Kuznetsov^b, M. V. Zamoryanskaya^a

^a Ioffe Institute, St. Petersburg
^b St. Petersburg Academic University — Nanotechnology Research and Education Centre of the Russian Academy of Sciences (the Academic University)

Abstract: The specific features of the cathodoluminescence (CL) spectra in AlInGaN heterostructures, caused by the influence of phase separation and internal electric fields, observed at varied CL excitation density, are studied. It is shown that the evolution of the CL spectrum and the variation in the spectral position of emission lines of nanoscale layers with current density in the primary electron beam makes it possible to identify the occurrence of phase separation in the layer and, in the absence of this separation, to estimate the electric-field strength in the active region of the structure.

Received: 09.12.2015
Accepted: 17.12.2015