Abstract
Cerium and terbium ions doped strontium aluminosilicate polycrystalline phosphors with monoclinic structure identified to I2/c space group were synthesized by the high temperature solid-state reaction. Differential NUV-blue fluorescence behaviors of Ce3+ were exhibited under UVB radiation, which were originated from the luminescence centers with different crystal field environment. Bright green fluorescence of Tb3+ was released under UVA radiation, and with the intervention of Ce3+ ions, the effective excitation spectral range of Tb3+ ions was extended from UVA to UVB due to the energy transfer from Ce3+ to Tb3+. Upon the excitation in extended region, the luminescence intensity of Tb3+ was remarkably strengthened by a maximum fluorescence sensitization factor of ~152. These results demonstrate that Ce3+ and Tb3+ doped SrAl2Si2O8 polycrystals are valuable NUV-blue and green phosphors, which have potential applications for phototherapy and color display.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call