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Optical Engineering

Characterization and luminescence properties of Sr3Gd(PO4)3:  Sm3+ orange–red phosphor
Author(s): Zaifa Yang; Denghui Xu; Jiayue Sun; Yumei Sun; Haiyan Du
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Paper 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 Sr3Gd0.93(PO4)3: 0.07Sm3+ was calculated to be 19.18   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.

Paper Details

Date Published: 9 October 2015
PDF: 5 pages
Opt. Eng. 54(10) 105102 doi: 10.1117/1.OE.54.10.105102
Published in: Optical Engineering Volume 54, Issue 10
Show Author Affiliations
Zaifa Yang, Beijing Technology and Business Univ. (China)
Denghui Xu, Beijing Technology and Business Univ. (China)
Jiayue Sun, Beijing Technology and Business Univ. (China)
Yumei Sun, Beijing Technology and Business Univ. (China)
Haiyan Du, Beijing Technology and Business Univ. (China)

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