Emission Color Variation of Sr₃SiO₅:Ce³⁺, Li⁺ Phosphor for Near-UV Light-Emitting Diodes by Co-Doping with Mg²⁺ and Ba²⁺

Abstract:

This paper reports the spectral variation of Sr3SiO5: Ce3+, Li+ phosphor. It was synthesized by the conventional solid state method. The effects of calcining temperature and codoption of Mg2+ and Ba2+ on phase composition, structure, photoluminescence and thermal stability were firstly investigated in detail. Under the near-UV excitation of 415 nm, Sr3SiO5: Ce3+, Li+ emits a bright greenish-yellow color centered at 532nm, which originates from 5d to 4f (2F7/2 and 2F5/2) transition of Ce3+. The PL spectra show the different emission color variation with substituting Sr2+ cations with smaller Mg2+ or larger Ba2+, which makes it be applied as a color-tunable phosphor for LED based on near-UV chip/phosphor technology. Simultaneously, the thermal stability of (Sr,Ba)3SiO5: Ce3+, Li+ phosphor is improved markedly.

• Periodical: Advanced Materials Research (Volumes 690-693)
• Pages: 555-558
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.690-693.555
• Online since: May 2013
• Authors: Ping Ping Zhu, Tong Wen Huang, Xiao Jun Wang, Hui Li Li, Zhuo Sun
• Keywords: Co-Doping, LED, Phosphor, Solid State Method, Sr₃SiO₅: Ce³⁺, Li⁺

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