Improvement of the Luminescent Performances of CaTiO3:Pr3
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Abstract:
Long after-glow red phosphors CaTiO_3:Pr~(3+),X~(3+)( X~(3+)=Gd~(3+),Dy~(3+),Tb~(3+),Eu~(3+)) were prepared by Solid State reaction process. The excitation spectrum, emission spectrum, XRD and the curve of afterglow decay were investigated. The decay curves indicate the luminescent performance is improved by co-doped the other three ions except Gd~(3+). Co-doping with Tb~(3+) and Eu~(3+) the excitation spectrum is a broad band , the main excitation spectrum and the subordinate excitation spectrum are red-shift. The absorption at 458,478,482 nm and 496 nm are increased. The emission spectrum peaking at 614 nm is due to a transition from ~1D_2-~3H_4 of Pr~(3+).The results of XRD reveal there is CaTiO_3 phase and the co-dopant isn't change the crystal field notably.
