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首页> 外文期刊>RSC Advances >Preparation of Sr8Mg1-mZnmY(PO4)(7):Eu2+ solid solutions and their luminescence properties
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Preparation of Sr8Mg1-mZnmY(PO4)(7):Eu2+ solid solutions and their luminescence properties

机译：Sr8Mg1-mZnmY（PO4）（7）：Eu2 +固溶体的制备及其发光性能

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A series of orthophosphate solid solutions with a general formula of Sr8Mg1-mZnmY(PO4)(7): Eu2+ (0 <= m <= 1) were synthesized by the combustion-assisted synthesis technique. The XRD patterns confirm the formation of a solid solution of Sr8Mg1-mZnmY(PO4)(7) and lattice parameters of the solid solutions are linearly dependent on m. The excitation spectra of these phosphors show broad band excitation and absorption in the 250-470 nm near ultraviolet (UV) region, which is ascribed to the 4f(7)-4f(6)5d(1) transitions of Eu2+. With an increase in m, the emission color shifts from yellow to green under near-UV excitation, which is rationalized in terms of two competing factors of the crystal filed strength and bond covalence. All the results indicate that the solid solution Sr8Mg1-mZnmY(PO4)(7): Eu2+ can be a good candidate of phosphor applicable to near-UV LEDs for solid-state lighting.
机译：通过燃烧辅助合成技术合成了一系列通式为Sr8Mg1-mZnmY（PO4）（7）：Eu2 +（0 <= m <= 1）的正磷酸盐固溶体。 X射线衍射图谱证实了Sr8Mg1-mZnmY（PO4）（7）固溶体的形成，且固溶体的晶格参数与m线性相关。这些荧光粉的激发光谱在250-470 nm附近的紫外（UV）区域显示宽带激发和吸收，这归因于Eu2 +的4f（7）-4f（6）5d（1）跃迁。随着m的增加，在近紫外线激发下，发射颜色从黄色变为绿色，这是根据晶体场强度和键合价的两个竞争因素合理化的。所有结果表明，固溶体Sr8Mg1-mZnmY（PO4）（7）：Eu2 +可能是适用于固态照明的近紫外LED的良好荧光粉候选者。

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