Preparation of Y₄MgSi₃O₁₃:Tb³⁺,Ce³⁺ Green Emitting Phosphor for White Light Emitting Diodes and its Luminescence Study

Abstract:

The Y₄MgSi₃O₁₃:Tb³⁺,Ce³⁺green phosphors are synthesized by sol-gel method, the preparation temperature, reduction atmosphere and luminescence characteristics of Y₄MgSi₃O₁₃ doped with single Ce³⁺ ions and Ce³⁺,Tb³⁺ ions have been studied. The excitation and emission spectra of phosphors is determined by fluorescence spectrophotometer. The results show that: luminous intensity of Y₄MgSi₃O₁₃:Tb³⁺phosphors increased after doped with Ce³⁺ ions and the optimal doping concentration of Ce³⁺ is 0.04. Y^3.94MgSi³O¹³: 0.02Tb³⁺,0.04Ce³⁺ green phosphor has the best luminescence characteristics under reduction atmosphere(H₂:N₂=1:3) at 1000°C, the phosphor gives intense green emission at 550nm originating from the ⁵D₄→⁷F₅ transition of Tb³⁺ ions.

• Periodical: Advanced Materials Research (Volumes 415-417)
• Pages: 1333-1339
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.415-417.1333
• Online since: December 2011
• Authors: Guo Hua Song, Bin Jiang, Jian Wen Miao, Bang Dong Ding
• Keywords: Excitation and Emission Spectra, Green Emitting Phosphors, Sol-Gel Method, White LED

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