Preparation and photoluminescence property of praseodymium doped calcium titanate nanocrystals

K. Minami, Y. Hakuta, M. Ohara, M. Aoki, K. Sue, H. Takashima

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)


    We report a continuous production of Perovskite-type metal oxide nano-phosphor CaTiO3:Pr by hydrothermal synthesis using a flow type reaction system. Aqueous mixing solution of Ca(NO3)2, TiO2sols, and Pr(NO3)3 were used as stating materials. Reaction temperatures and pressure were set to 200 to 400 °C and 30 MPa, respectively. Characteristics were performed by powder X-ray diffractometry, transmission electron microscopy and spectrophotometer. We investigated the effects of the reaction temperature on crystal structure, particle size and photoluminescence properties. From the results, the particle obtained at 400°C was single crystal with around 20 nm in a diameter and had Perovskite structure. The particles shows a typical red emission peak at around 612 nm, which is assigned to the transition 1D23H4 of Pr3+. The intensity of the red luminescence increased with reaction temperature and then it showed the maximum at 400°C of supercritical water condition.

    Original languageEnglish
    Pages (from-to)19-24
    Number of pages6
    JournalECS Transactions
    Issue number41
    Publication statusPublished - 2012 Dec 1

    ASJC Scopus subject areas

    • Engineering(all)

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