Synthesis and luminescent properties of a novel bluish-white afterglow phosphor, b-Zn3(PO4)2:Hf4+.
A new bluish-white long-lasting phosphorescent material, Hf4+-doped b-Zn3(PO4)2, was prepared by the conventional high-temperature solid-state method. The photoluminescence (PL) spectrum reveals that it exhibits a strong blue emission band centred at 470 nm, with asymmetry on the long wavelength side; this material emits bluish-white light and shows strong afterglow phosphorescence after it is excited with a 254 nm UV lamp. The phosphorescence lasts nearly 40 min in the light perception of the dark-adapted human eye (0.32 mcd/m(2)). The possible phosphorescence mechanism is also analysed.
Peng
Zifei
Z
College of Life and Environment Sciences, Shanghai Normal University, Shanghai 200234, People's Republic of China. shangbaxu@hotmail.com
Xu
Zhu
Z
Luo
Caiqin
C
Yu
Junbao
J
Zhang
Guobin
G
D005123:Eye / Q000737:chemistry; D006195:Hafnium / Q000737:chemistry* / Q000528:radiation effects; D006801:Humans; D049449:Luminescence; D010710:Phosphates / Q000737:chemistry* / Q000528:radiation effects; D013050:Spectrometry, Fluorescence / Q000379:methods; D013696:Temperature; D013997:Time Factors; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction; D017967:Zinc Compounds / Q000737:chemistry* / Q000528:radiation effects
D010710:Phosphates; D017967:Zinc Compounds; C043952:zinc phosphate; D006195:Hafnium