Tunable color emission and afterglow in CaGa2S4:Eu2+, Ho3+ phosphor

Chongfeng Guo*, Qiang Tang, Dexiu Huang, Chunxiang Zhang, Qiang Su

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    21 Citations (Scopus)

    Abstract

    The tunable color emission and persistent luminescence lifetime in phosphor CaGa2S4: Eu2+, Ho3+ were achieved through the introduction of alkaline earth elements Mg, Sr and Ba, in which the Ca was partially replaced. The duration of the persistent luminescence of the material CaGa2S4: Eu2+, Ho3+ was remarkably shortened as Al was introduced, substituting for Ga. The luminescent properties were investigated via thermo-luminescence (TL) glow curves, phosphorescence spectra and decay time curves. These results show that vast changes in trap levels and charge density takes place with introduction of other alkaline earth elements or Al. Trap depths and the trap density were also evaluated by simple methodologies.

    Original languageEnglish
    Pages (from-to)2032-2039
    Number of pages8
    JournalMaterials Research Bulletin
    Volume42
    Issue number12
    DOIs
    Publication statusPublished - 4 Dec 2007

    Keywords

    • A. Chalcogenides
    • A. Optical materials
    • D. Luminescence

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