SYNTHESIS AND SPECTRAL-LUMINESCENT PROPERTIES OF LIGHT-ACCUMULATING OXIDES HfO2-ZrO2

The chemical deposition method was used to synthesize light-accumulating HfO2-ZrO2 oxide systems with afterglow duration up to 10 min and their spectral-luminescent properties were studied. The HfO2:ZrO2 ratio was found to have a significant effect on the intensity and decay kinetics of the visible luminescence of such systems as well as on the weighting coefficients and positions of individual components of the luminescence and luminescence excitation spectra. The results were explained by the contribution of complex titanium impurity optical centers in ZrO2 to the intracenter luminescence of oxygen vacancies in HfO2 and the competitive quenching of the luminescence by nonradiative recombination sites;