Effect Of The Oxygen Deficiency On The Luminescent Properties Of The Mixed Yvxp1-Xo4 Phosphors

In the paper the effect of oxygen vacancies on the luminescent properties of mixed YVxP1-xO4 phosphors was studied. Amount of oxygen vacancies was controlled by annealing the phosphors in the oxidizing and neutral atmospheres. It was shown that in oxygen-deficient YVxP1-xO4 phosphors a strong luminescence quenching is observed, which was attributed to the migration -enhanced energy transfer from undistorted to distorted vanadate complexes. Also, the contribution of the emission of such distorted vanadate complexes leads to the broadening and red shift of the luminescence band of the mixed phosphors.