Evaluation and preparation of Li1+x-yNb1-x-3yTix+4yO3 solid solution with superstructure as new phosphor

New red phosphors have been investigated in this study with europium as an activator added to Li1+x-yNb1-x-3yTix+4yO3 (LNT) solid solutions with an M Phase superstructure. The photo-luminescence intensity of LNT:Eu solid solutions was dependent on the levels of both the Eu doping and the TiO2 content, and was superior to that of LiNbO3:Eu. LNT:Eu solid solutions with 2.5 wt.% Eu2O3 showed the highest performance in this work, and maximum intensity was observed when the TiO2 content of LNT:Eu solid solutions was 10 mol.%. Structural analysis by XRD and HREM showed that in these new phosphors the M Phase superstructure was affected by the doping, with the periodicity of the superstructure becoming wider and more random.