Preparation and Luminescence Properties of Sr₂CeO₄ Doped with Ho³⁺

Abstract:

Sr₂CeO₄: Ho³⁺ was prepared by high-temperature solid-state method. The products were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and photo luminescent (PL). The Sr₂CeO₄:Ho³⁺ phosphors showed a red emission under the near-ultraviolet excitation (280 nm) and the main emission centered at 475 nm. It has been found that A⁺ (A⁺ = Li⁺, Na⁺ or K⁺) codoped Sr₂CeO₄: Ho³⁺ phosphors could lead to a remarkable increase of photoluminescence. Luminous intensity was the highest when doping Li⁺ ions. Investigation indicated that Sr₂Ce_0.989O₄: 0.001Ho³⁺, 0.01Li⁺ exhibited the strongest emission. The average particle size was about 6 um. The optimum sintering temperature was 1200 °C and the possible mechanism was also discussed.

• Periodical: Key Engineering Materials (Volume 591)
• Pages: 272-276
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.591.272
• Online since: November 2013
• Authors: Fang Zhang, Chao Song, Ling Li Ma, Xiao Li Xu, Zi Fei Peng
• Keywords: Photoluminescence (PL), Solid-State Reaction, Sr₂CeO₄: Ho³⁺

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