Surface effects in luminescence and decay profiles of Cr6+-V5+ and Cr6+-Ag+ codoped nanostructured sol-gel SiO2 glass

Abstract Luminescence and decay profiles of codopant (Cr 6+ . V 5+ ) and (Cr 6+ , Ag + ) ions in sol- gel silica glasses are investigated at temperatures between 10 and 300 K. The closed-shell electronic structures of these ions reveal luminescence and decay profiles affected sensitively by energy migration processes, surface effects and preparation methods of the nano-structured matrices.