The luminescent properties of lanthanide ions activated BaBPO5 in VUV–Vis range Original Research Article

The VUV–Vis spectroscopic properties of barium borophosphate BaBPO5 doped with lanthanide ions are investigated. The host absorption band is found to be around 150–160 nm, the charge transfer band of Eu3+ is observed at about 264 nm, the f–d transitions of Ce3+, Eu2+, and Tb3+ in the host lattice are depicted. The partial reduction of Eu3+ in air atmosphere is reported.