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Fabrication and Spectroscopic Investigation of La2Hf2O7-Based Phosphors

Phase-pure crystalline La2Hf2O7 doped with activators were directly synthesized through combustion process and glycine as a fuel. The basic luminescent properties of Eu, Tb, Pr, Ce or Ti in La2Hf2O7 were investigated. Luminescence was not observed in La2Hf2O7:Ce, probably due to the luminescence of Ce being completely quenched by the impurities in La2Hf2O7. All the other activators doped La2Hf2O7 samples show bright luminescence under UV excitation.