Mechanoluminescence of a composite based on polymethylmethacrylate and fine-disperse powder of SrAl 2 O 4 :(Eu 2+ , Dy 3+ ) phosphor

Abstract

The paper deals with photoluminescence and deformation luminescence (mechanoluminescence) of a composite material based on fine-disperse powder of phosphor SrAl 2 O 4 :(Eu 2+ , Dy 3+ ) and polymethylmethacrylate that is transparent in the visible region. The luminescent (sensory) layer responsive to mechanical action was formed in the surface layer of the polymethylmethacrylate. To excite of photoluminescence the short pulses of a nanosecond laser were used. Mechanoluminescence was excited by the short acoustic impulses generated by a nanosecond laser. New information about the energy levels of impurities was obtained.