Crystal structure and luminescence property of a novel single-phase white light emission phosphor KCaBi(PO4)(2):Dy3+
Crystal structure and luminescence property of a novel single-phase white light emission phosphor KCaBi(PO4)(2):Dy3+
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新型单相白光荧光粉KCaBi(PO4)(2):Dy3的晶体结构及发光性能
DOI：
10.1016/j.materresbull.2016.10.005
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发表时间：
2017
影响因子：
5.4
通讯作者：
Fang Minghao
中科院分区：
文献类型：
--
作者：
Mi Ruiyu;Chen Jian;Liu Yangai;Mei Lefu;Yuan Jiangyan;Xia Yufei;Huang Zhaohui;Fang Minghao
采用固相反应法制备了一种新型的紫外光激发白光荧光粉KCaBi(PO4)2：Dy3+。采用粉末X射线衍射图、Rietveld精细化和XPS等手段对产物的相组成和晶体结构进行了表征。对所制备的荧光粉的激发光谱、发射光谱、衰减曲线和色度坐标进行了表征，以研究其在白光发光二极管中的应用。结果表明，KCaBi(PO4)2：Dy3+能有效地被近紫外光吸收，并分别在4F9/2-6H15/2，4F9/2-6H13/2跃迁产生了480 nm(蓝光)和580 nm(黄光)两个发射峰。计算出临界距离约为17.96°，浓度猝灭机制为偶极-偶极相互作用。此外，确定了最佳色度坐标为(0.3118，0.3309)，并说明了该荧光粉具有较好的热稳定性。
A novel white light emitting phosphor KCaBi(PO4)2:Dy3+for UV excitations has been synthesized by the solid state reaction technique. The powder X-ray diffraction patterns, Rietveld refinement and XPS were utilized to confirm the phase composite and crystal structure. The excitation and emission spectra, decay curves and chromaticity coordinates of the as-prepared phosphors were characterized to investigate the photoluminescence properties for application in white light-emitting diodes. The results revealed that the KCaBi(PO4)2:Dy3+phosphors can be effectively assimilated with near ultraviolet, and exhibit two emission bands peaked at 480 nm(blue light) and 580 nm(yellow light) originating from the4F9/2-6H15/2,4F9/2-6H13/2transitions of Dy3+, respectively. The critical distance was calculated to be about 17.96 Å and the concentration quenching mechanism was verified as dipole-dipole interaction. Additional, the optimal chromaticity coordinates were determined to be (0.3118, 0.3309) and a better thermal stability of the phosphors have been illustrated.