Ce3+, Tb3+ and Mn2+-activated KSrGd(PO4)2 phosphors with high absolute quantum efficiencies were first prepared by a Pechini-type sol–gel method. The photoluminescence and cathodoluminescence intensities of Tb3+/Mn2+ can be enhanced by co-doped Ce3+ ions into the KSrGd(PO4)2 host via the energy transfer process.
Dalton Transactions
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