Synthesis and luminescent properties of a new green CaZrO₃: Ho³+long persistent phosphors

박병석; Jong Geon Choi (최종건)

Synthesis and luminescent properties of a new green CaZrO₃: Ho³+long persistent phosphors

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2008, 18(3), pp.109~114
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering

박병석 ¹, Jong Geon Choi ¹

¹동신대학교

Accredited

ABSTRACT

Novel green long persistent phosphors of CaZrO₃: Ho³+ have been synthesized at high temperature with weakreduction atmosphere by traditional solid state reaction method. The role of H₃BO₃ as flux and the suitable concentration of Ho as activator on the CaZrO₃: Ho³+ long persistent phosphors has been investigated. Crystals of Ho³+ doped CaZrO₃longpersistent phosphores were characterized by fluorescence spectrophotometer and photoluminescence (PL). The main emissionspectra of 546 nm peak was revealed through synthesizing at high temperature in N₂gas atmosphere. The afterglowemission spectra of CaZrO₃: Ho³+ long persistent phosphores arise at 546 nm peak of narow range. because that revealedpure gren color. Green long persistent phosphors have been observed in the system for over 5 h after UV irradiation(254 nm). The main emission peak was ascribed to Ho³+ ions transition from 5F4, 5S2 →5I3, and the afterglow may be3 host lattice.

KEYWORDS

Green, CaZrO₃, Long persistent phosphor, Ho³+, Afterglow

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