Photoluminescence properties of Eu3+ in garnet-type Li7La3Zr2O12 polycrystalline ceramics

Novel Eu3+ doped zirconate garnet-type ceramics, Li7(La3−xEux)Zr2O12 with x=0, 0.001–1.0, have been synthesized by solid state reaction and the purity phase of the samples was checked by XRD. Room temperature steady and time-resolved emission spectra, under UV and visible light excitation energy, have been investigated. The concentration effect on the quenching blue emission, due to the Zr–O charge transfer transition and 5D0→7F2 emission transition of Eu3+ were studied in detail. The results indicate that there exists efficient energy transfer from host to Eu3+. The mechanism of interaction between Eu3+ ions has also been investigated by means of the Inokuti–Hirayama model.