The temperature quenching of the cathodoluminescence bands in titanium dioxide

The cathodoluminescence spectra of titanium dioxide (TiO2) rutile powder have been measured under vacuum at a range of temperatures from 87 to 297 K. The bands with peaks centered at 3.41, 3.29, 2.63, 1.52, and 1.15 eV have been measured and the quenching of the bands with the observed temperatures. The peak intensities have been determined by deconvoluting the spectra with a series of fixed width Gaussian peaks and the relative intensities have been correlated with temperature quenching and an activation temperature for the bands has been calculated.