Eu~(2+)和Dy~(3+)共掺Ca_xSr_(2-x)SiO_4硅酸盐固溶体发光性质探究（英文）
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摘要
稀土发光材料和固溶体发光材料受到人们的广泛关注,稀土固溶体发光材料本身的结构特性在一定程度上能够影响和决定它的发光特性,而发光特性又直接关系到材料的性能和使用前景.因此,本论文的主要工作是通过改变固溶体发光材料Ca_xSr_(2-x)SiO_4:0.01Eu~(2+),0.01Dy~(3+)固溶离子Ca和Sr的比例浓度来实现对固溶体发光材料基质结构的调节,测得了不同固溶比例下的样品的激发光谱和部分发射光谱以及热释光谱,并对这些实验结果进行分析.
A series of divalent europium(Eu~(2+))ions and trivalent dysprosium(Dy~(3+))ions co-doped solid-solution Ca_xSr_(2-x)SiO_4(x=0,0.2,0.4,0.6,0.8,1.0,1.2,1.4,1.6,1.8,2.0)phosphors were synthesized by solid-state reaction and their luminescent spectroscopic properties were investigated.Photoluminescence emission spectra of Ca_xSr_(2-x)SiO_4:0.01 Eu~(2+),0.01 Dy~(3+) phosphor was changed by increasing the proportion of Ca~(2+) ions.Two emission bands originated from the 5 d-4 ftransition of Eu~(2+) ion occupying two different cation sites in the Ca_xSr_(2-x)SiO_4 host lattice were observed under ultraviolet excitation when x≥1.2.The red-shift of emission peaks with different Ca~(2+) and Sr~(2+) concentrations was observed when 0
A series of divalent europium(Eu~(2+))ions and trivalent dysprosium(Dy~(3+))ions co-doped solid-solution Ca_xSr_(2-x)SiO_4(x=0,0.2,0.4,0.6,0.8,1.0,1.2,1.4,1.6,1.8,2.0)phosphors were synthesized by solid-state reaction and their luminescent spectroscopic properties were investigated.Photoluminescence emission spectra of Ca_xSr_(2-x)SiO_4:0.01 Eu~(2+),0.01 Dy~(3+) phosphor was changed by increasing the proportion of Ca~(2+) ions.Two emission bands originated from the 5 d-4 ftransition of Eu~(2+) ion occupying two different cation sites in the Ca_xSr_(2-x)SiO_4 host lattice were observed under ultraviolet excitation when x≥1.2.The red-shift of emission peaks with different Ca~(2+) and Sr~(2+) concentrations was observed when 0
引文
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