Size manipulated photoluminescence and phosphorescence in CaTiO 3:Pr3+ nanoparticles

Xianmin Zhang, Xia Zhang, Jiahua Zhang, Meiyuan Wang, Haifeng Zhao, Shaozhe Lu, Xiao Jun Wang

    Research output: Contribution to journalArticlepeer-review

    43 Citations (Scopus)


    Red emitting nanophosphors of CaTiO3:Pr3+ with various particle sizes were prepared by sol - gel methods and structurally characterized by X-ray diffraction and field emission scanning electron microscopy. The fluorescent and phosphorescent properties of CaTiO 3:Pr3+ nanoparticles as a function of particle sizes were investigated by using photoluminescence and photoluminescence excitation spectra as well as time decay patterns of fluorescence and phosphorescence. On the analysis of the longer lifetimes at 300 K as compared to that at 77 K and the appearance of maximal photoluminescence, the dependence of photoluminescence on phosphorescence is demonstrated. A very highly efficient phosphorescence recombination channel in the nanophosphor is proposed and discussed. This work provides a promising method to develop novel phosphors by manipulating the number of traps on the surface of nanophosphors through adjusting the particle size.

    Original languageEnglish
    Pages (from-to)18044-18048
    Number of pages5
    JournalJournal of Physical Chemistry C
    Issue number49
    Publication statusPublished - 2007 Dec 13

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Energy(all)
    • Physical and Theoretical Chemistry
    • Surfaces, Coatings and Films


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