Abstract
Photoluminescence properties of Eu3+-doped GdAlO3 and LaAlO3 phosphors prepared by sol–gel method have been investigated by the site-selective laser spectroscopy along with the decay time measurements at room temperature. The site-selective excitation spectra showed one 7F0→5D0 transition line in GdAlO3:Eu3+ and three 7F0→5D0 transition lines in LaAlO3:Eu3+, indicating that there was only one crystallographic site for Eu3+ in GdAlO3 and three crystallographic sites for Eu3+ in LaAlO3. The result of LaAlO3 was not in agreement with its crystal structure. The stark energy levels for Eu3+ at different sites were characterized and discussed by site-selective emission spectra arose from 5D0 level of Eu3+.
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