Fig. 5. (Color online) (a, b) Excitation and emission spectra of the CaTiO3:Eu3+ 1200 °C concentration series; (c, d) excitation and emission spectra of the CaTiO3:Eu3+ 6 mol% temperature series. The insets in (b) and (d) show PL emission intensities as a function of Eu3+-doping concentration and annealing temperature, respectively.
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