Meanwhile, the luminescence intensity and lifetime of Pr 3+ exhibit a decreasing trend with Cr 3+ doping in La 3 Ga 5 GeO 14 : Pr 3+ , Cr 3+ , demonstrating the existence of the energy transfer from Pr 3+ to Cr 3+ .
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Meanwhile, the luminescence intensity and lifetime of Pr 3+ exhibit a decreasing trend with Cr 3+ doping in La 3 Ga 5 GeO 14 : Pr 3+ , Cr 3+ , demonstrating the existence of the energy transfer from Pr 3+ to Cr 3+ .