Luminescence enhancement of Eu 3+ -activated La 2 Mo 2 O 9 red-emitting phosphor through chemical substitution

摘要: A series of red-emitting phosphors with compositions La2(Mo1−zSiz)2O9:0.05Eu3+ (0 ≤ z 0.10) strong near-UV absorption were prepared by solid-state method. The structure and luminescence properties investigated x-ray powder diffraction, UV–vis diffuse reflectivity, photoluminescence spectra. luminescent as a function Si4+ concentrations systematically studied. Under excitation wide range (250–430 nm) or blue light, Si4+-doped exhibit characteristic red emission Eu3+ peaked at 615 nm. incorporation into La2Mo2O9:0.05Eu3+ phosphor leads to the improvement broad band sharp peaks, well broadening charge transfer band. Appropriate amount doping can enhance intensity. Finally, possible reasons for enhancement via corporation explained.