Abstract
The temperature-dependent photoluminescence (PL) spectra of BaIn2O4, prepared
by coprecipitation, are measured and discussed. Aside from the reported 3.02-eV
violet emission, the 1.81-eV yellow emission involved with oxygen vacancy is also
observed at room temperature wherein the deep donor level is at 1.2 eV. With the
temperature increasing, the peak energies for both emissions show a red shift.
Moreover, the yellow emission intensity decreases while the violet emission
intensity increases. The temperature dependence of the yellow emission intensity
fits very well into the one-step quenching process equation, indicating a fitted
activation energy at 19.2 meV.
© 2011 Chinese Optics Letters
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