title: Photoluminescence of CaxSr(1-x) (NbO3)2:Pr3+ (0 < or = x < or = 1) nanophosphors.
abstract: Nanoparticles of CaxSr(1-x) (NbO3)2 doped with Pr3+ have been synthesized by sol-gel method. Particles have sizes in the range of 50-70 nm. The CaxSr(1-x) (NbO3)2:Pr3+ phosphors showed a white emission under the near-ultraviolet excitation (254 nm). There is a large photoluminescence enhancement of the CaxSr(1-x) (NbO3)2:Pr3+ phosphor samples when added with 0.5% KCl. X-ray diffraction (XRD), transmission electron microscope (TEM), photo luminescent (PL) analysis were utilized to characterize the CaxSr(1-x) (NbO3)2:Pr+ particles. The concentration quenching of the samples was discussed as well. The optical concentration and the calcination temperature were 0.8 mol% of Ca2+ and 900 degrees C for these phosphors, respectively, the possible mechanism was discussed. CaxSr(1-x) (NbO3)2:Pr3+ is a promising white phosphor under near-ultraviolet excitation for various applications.
authors.affiliation: Department of Chemistry, Shanghai Normal University, Shanghai, 200234, People's Republic of China.
authors.forename: Zifei
authors.initials: Z
authors.lastname: Peng
authors.forename: Zhenhu
authors.initials: Z
authors.lastname: Gong
authors.forename: Xu
authors.initials: X
authors.lastname: Feng
authors.forename: Feng
authors.initials: F
authors.lastname: Tang
authors.forename: Chao
authors.initials: C
authors.lastname: Song
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Yin
authors.forename: Guobin
authors.initials: G
authors.lastname: Zhang