Effect of Tb³⁺-Coped Concentration on Properties of Li₂SrSiO₄:Tb³⁺ Phosphor

Abstract:

A series of Tb³⁺-doped Li₂SrSiO₄ phosphors were prepared by high temperature solid state reaction. Effect of Tb³⁺-coped concentration on luminescence properties of Li₂SrSiO₄: Tb³⁺ phosphor was investigated by XRD, FTIR, PL and CEI measurements. The results showed that the unit cell constant of Li₂SrSiO₄:Tb³⁺ was reduced gradually with increasing Tb³⁺ concentration, and then the FTIR absorption intensity assigned to the stretch vibration of [SiO₄] and bend vibration of Si-O was decreased. The emission properties of Li₂SrSiO₄:Tb³⁺ phosphors are strongly dependent on the concentration of Tb³⁺. The stronger blue and weaker green emission were shown as adding 1% Tb³⁺ amount, while single bright green emission was presented in 20% Tb³⁺ contents. The corresponding CIE was observed from (0.192, 0.315) to (0.246, 0.599). The results showed that the luminescence properties of Li₂SrSiO₄:Tb³⁺ phosphor could meet various requirements by tuning the Tb³⁺-doped concentration.

• Periodical: Advanced Materials Research (Volumes 919-921)
• Pages: 2052-2056
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.919-921.2052
• Online since: April 2014
• Authors: Panli You
• Keywords: Decay Lifetime, FTIR, Li₂SrSiO₄, Luminescence, Tb³⁺-Doped Concentration

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