Luminescence spectra of stilbene-3 doped lead–tin–fluorophosphate glass excited by VUV–UV synchrotron radiation

The stilbene-3 doped lead–tin–fluorophosphate glasses were successfully prepared and the luminescence spectra obtained from VUV–UV synchrotron radiation were investigated. The emission peaked about 440 nm from the undoped glass is observed at low temperature but quenches at room temperature. The doped glass exhibits strong characteristic emission of stilbenen-3 with 467 and 436 nm Gaussian bands under ultraviolet 250–330 nm excitation (characteristic excitation of stilbene-3) but weak emission under vacuum ultraviolet 190 nm excitation (host excitation). It is suggested that the energy transfer from host to the stilbene-3 dye can occur but the efficiency is still fairly low.