Multiwavelength excited white-emitting Dy³⁺ doped Sr₃Bi(PO₄)₃ phosphor

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• 作者：Zhiping Yang^a ; Yufeng Liu^a ; ^{liuyufeng4@126.com} ; Chong Liu^a ; Fu Yang^a ; ^b ; Quanmao Yu^c ; Xu Li^a ; Fachun Lu^a
• 关键词：A. Powders ; solid-state reaction ; C. Optical properties ; Luminescence ; Phosphors
• 刊名：Ceramics International
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：39
• 期：6
• 页码：7279-7283
• 全文大小：533 K

文摘

Multiwavelength excited white emitting phosphor Dy³⁺ doped Sr₃Bi(PO₄)₃ was synthesized by solid state reaction method. The phase of the as-prepared powders was measured by X-ray diffraction pattern (XRD) and the luminescent properties of Sr₃Bi(PO₄)₃:Dy³⁺ were systematically investigated by excitation spectra, emission spectra and concentration quenching. The excitation spectra included bands located at 348 nm, 362 nm, 385 nm and 451 nm were due to the f-f transitions of Dy³⁺ within its 4f⁹ configuration. This excitation is useful for solid state lighting and light-emitting diodes. Under 348 nm excitation, the emissions of Dy³⁺ ions are observed at 481 nm (blue) due to the ⁴F_9/2-⁶H_15/2 transitions, 575 nm (yellow) due to ⁴F_9/2-⁶H_13/2 transitions and a weak 664 nm (red) due to ⁴F_9/2-⁶H_11/2 transitions. The optimal emission intensity of the Sr₃Bi_1?x(PO₄)₃:xDy³⁺ phosphors is found to be x=0.07. The chromaticity coordinates of the samples were in the near white region. All results demonstrated that Sr₃Bi(PO₄)₃:Dy³⁺ might be a potential phosphor for NUV-based white light-emitting diodes.