Luminescence spectra of phosphorus containing samples
depend on excitation source. To take advantage of this fact, we had
performed time resolved spectra measurements. One experiment,
made use of a pulsed F2 laser (157 nm or 7.9 eV), which revealed a
fast component, mainly due to UV bands in all three studied
objects, Fig. 5. However, time resolved PL bands of α-quartz crystal
and phosphor–silicate 3P2O5 7SiO2 glass possess different positions
(4.9 eV for α-quartz and 4.5 eV for 3P2O5 7SiO2 glass and
4 eV for CaO P2O5 glass. The data for CaO P2O5 are taken from
[5].), all of these decay curves are close to a t
1 law, implying
second-order kinetics (as for electron and hole recombination).
After Ref. [17] the t
1 is a sign of tunneling recombination.