Cathodoluminescence study of Zn doped Gan

Abstract
The luminescence properties of GaN doped with Zn are reported. As the Zn concentration increases four different emissions are found using cathodoluminescence : blue (2.85 eV), green (2.5 eV), yellow (2.2 eV) and sometimes red (1.9 eV). Through the analysis of the influence of temperature, injection and time dependence, the blue, green and yellow emissions are found to fit a pair transition model, with a strong phonon coupling. The recombination model is discussed in view of the observed variation of the emission intensities versus injection level

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