Li/Ag ratio dependent structure and upconversion photoluminescence of Li(x)Ag(1-x)Yb(0.99)(MoO4)(2):0.01Er(3+) phosphors.
Li/Ag ratio dependent structure and upconversion photoluminescence of Li(x)Ag(1-x)Yb(0.99)(MoO4)(2):0.01Er(3+) phosphors.
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DOI：
10.1039/c4cp03950e
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发表时间：
2015-01
期刊：
影响因子：
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通讯作者：
Fangrui Cheng;Z. Xia;X. Jing;Ziyuan Wang
中科院分区：
文献类型：
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作者：
Fangrui Cheng;Z. Xia;X. Jing;Ziyuan Wang
采用固相反应法合成了一系列双掺铒白钨矿型荧光粉LixAg 1-xYb0.99（MoO 4）2：0.01Er（3+）（x = 0，0.1，0.3，0.5，0.7，0.9，1.0），研究了其晶体结构和上转换发光性能。讨论了这一系列样品的相结构演变，并基于Rietveld精修对所选Li0.5Ag0.5Yb0.99（MoO 4）2：0.01Er（3+）样品进行了分析。研究了其紫外发光特性及相关的紫外发光机理。随着Li/Ag比的增加，LixAg 1-xYb 0. 99（MoO 4）2：0. 01 Er（3+）的UC发光强度明显增强，这种增强可能是由于LixAg 1-xYb（MoO 4）2基质和激活剂Er（3+）的两个能级之间的耦合效应和无辐射跃迁所致。
A series of double molybdate scheelite-type phosphors LixAg1-xYb0.99(MoO4)2:0.01Er(3+) (x = 0, 0.1, 0.3, 0.5, 0.7, 0.9, 1.0) were synthesized by the solid state reaction method, and their crystal structures and upconversion (UC) luminescence properties were investigated in detail. The phase structure evolution of this series samples was discussed and the selected Li0.5Ag0.5Yb0.99(MoO4)2:0.01Er(3+) was analyzed based on the Rietveld refinement. The UC emission properties and the related UC mechanism were also studied. With an increasing Li/Ag ratio in this host, the UC emission intensities of LixAg1-xYb0.99(MoO4)2:0.01Er(3+) increased obviously, and the enhancement could be attributed to the coupling effect and the nonradiative transition between two energy levels of LixAg1-xYb(MoO4)2 matrices and the activator Er(3+), which have also been analyzed based on the results of the ultraviolet-visible diffuse reflection spectroscopy (UV-vis DRS) and Raman spectroscopy.