Characterization and luminescence properties of Sr3Gd(PO4)3:  Sm3+ orange–red phosphor

Zaifa Yang; Denghui Xu; Jiayue Sun; Yumei Sun; Haiyan Du

doi:10.1117/1.OE.54.10.105102

9 October 2015 Characterization and luminescence properties of Sr₃Gd(PO₄)₃: Sm³⁺ orange–red phosphor

Zaifa Yang, Denghui Xu, Jiayue Sun, Yumei Sun, Haiyan Du

Author Affiliations +

Optical Engineering, Vol. 54, Issue 10, 105102 (October 2015). https://doi.org/10.1117/1.OE.54.10.105102

Abstract

Reddish-orange emitting phosphors, Sr₃Gd(PO₄)₃: Sm³⁺, were successfully synthesized by a conventional solid-state reaction. The crystal structure of the phosphors was characterized by x-ray diffraction. The excitation spectra and emission spectra were utilized to characterize the luminescence properties of the as-prepared phosphors. The results show that the phosphor consisted of some sharp emission peaks of Sm³⁺ ions centered at 564, 600, 647, and 707 nm, respectively. The critical distance of Sr₃Gd_0.93(PO₄)₃: 0.07Sm³⁺ was calculated to be 19.18 Å and the lifetime value of the sample was 1.63 ms. The band gap of Sr₃Gd(PO₄)₃ was estimated to be about 2.74 eV from the diffuse reflection spectrum. The optimum doping concentration is 7 mol. % and the quenching occurs via dipole–dipole interaction according to Dexter’s theory. The Commission Internationale de L’Eclairage value of Sr₃Gd(PO₄)₃: Sm³⁺ phosphors presented that it has high color purity. These results indicated that the Sr₃Gd(PO₄)₃: Sm³⁺ may be a promising reddish-orange emitting phosphor for cost-effective near ultraviolet white light-emitting diodes.

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Zaifa Yang, Denghui Xu, Jiayue Sun, Yumei Sun, and Haiyan Du "Characterization and luminescence properties of Sr₃Gd(PO₄)₃: Sm³⁺ orange–red phosphor," Optical Engineering 54(10), 105102 (9 October 2015). https://doi.org/10.1117/1.OE.54.10.105102

Published: 9 October 2015

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