Cathodoluminescence of hydrogen-doped MgO crystals thermochemically reduced at high temperatures

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Abstract
Cathodoluminescence studies of hydrogen-doped MgO crystals thermochemically reduced at high temperatures show that there is no direct correlation between the intensity of the cathodoluminescence and photoluminescence bands. These crystals contain anion vacancies and H− ions. Luminescence bands at 2·95 eV (420 nm) and 2·4 eV (520 nm) correspond to emission from the two charge states of the anion vacancies. In contrast to photoluminescence, the intensity of the latter cathodoluminescence band is much smaller than that of the former. The effect of indentation and subsequent electron irradiation on the cathodoluminescence and photoluminescence is described.