Photoluminescence properties under vacuum ultraviolet (VUV, 147 nm) excitation were investigated for a new borophosphate compound.
The new phosphor, Sr6BP5O20, has a relatively strong absorption band in a short wavelength region because of the strong covalent characters
of B–O and P–O bonds. The phosphor activated by Eu2+ showed a strong blue luminescence. The luminance is about 2.2 times as bright as
a commercial blue phosphor, BaMgAl10O17:Eu2+. The phosphor is an attractive candidate of new phosphors for plasma display panels and
mercury-free fluorescent lamps.