A Novel Green-Emitting Phosphor: LiLa₂BO₅:Ce³⁺,Tb³⁺ with High Luminescence Efficiency

Abstract:

Novel Ce³⁺ and Tb³⁺ co-doped LiLa2BO5 phosphor, synthesized by a solid state reaction in reductive atmosphere, exhibits enriched emission spectrum in the green region .The XRD patterns, photoluminescence spectra and SEM were recorded and the effects of Tb³⁺ and Ce³⁺ concentration, sintering condition on the luminescent properties of as-synthesized phosphors were investigated. The emission spectra under ultraviolet (200--350 nm) radiation showed a dominant peak at 544 nm attributed to the ⁵D₄⁷F_J(J=0,1,2...6) transition of Tb³⁺, which was greatly enhanced by the co-doping of Ce³⁺, indicating that there occurred an efficient nonradioactive energy transfer from Ce³⁺ to Tb³⁺. The experimental result shows that the optimum Ce³⁺ and Tb³⁺ doping concentrations are 15 at% and 10 at% respectively.Keywords: Green phosphor; High luminescence efficiency; LiLa2BO5:Ce³⁺,Tb³⁺ ; Rare earths

• Periodical: Advanced Materials Research (Volume 800)
• Pages: 260-264
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.800.260
• Online since: September 2013
• Authors: Yin Rong Fu
• Keywords: Green Phosphor, High Luminescence Efficiency, LiLa₂BO₅:Ce³⁺,Tb³⁺, Rare Earth

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