RE2(MO4)3:Ln3+ (RE = Y, La, Gd, Lu; M = W, Mo; Ln = Eu, Sm, Dy) microcrystals: controlled synthesis, microstructure and tunable luminescence
RE2(MO4)3:Ln3+ (RE = Y, La, Gd, Lu; M = W, Mo; Ln = Eu, Sm, Dy) microcrystals: controlled synthesis, microstructure and tunable luminescence
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DOI：
10.1039/c3ce40495a
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发表时间：
2013-06
期刊：
影响因子：
3.1
通讯作者：
You Zhou;B. Yan
中科院分区：
文献类型：
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作者：
You Zhou;B. Yan
采用聚乙烯吡咯烷酮（PVP）辅助水热法合成了形状和尺寸均匀的RE 2（MO 4）3：Ln 3+（RE = Y，La，Gd，Lu; M = W，Mo; Ln = Eu，Sm，Dy）微晶。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和选区电子衍射（SAED）对样品的结构和形貌进行了表征。讨论了晶体结构和形貌差异的可能原因。在紫外光激发下，这些微晶都表现出强烈的彩色发光（白色、黄色、红色）。研究了不同Eu 3+掺杂量的La 2（WO 4）3：Eu 3+的光致发光（PL）特性，发现La 2（WO 4）3：Eu 3+的发光可调，并得到了最佳的Eu 3+掺杂浓度。
RE2(MO4)3:Ln3+ (RE = Y, La, Gd, Lu; M = W, Mo; Ln = Eu, Sm, Dy) microcrystals with uniform shape and size were synthesized via a hydrothermal method using a polyvinylpyrrolidone (PVP)-assisted processes. The crystalline structure and morphology of these as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED). Possible reasons for the differences in crystal structures and morphologies were discussed. Furthermore, the photoluminescence (PL) properties of these as-obtained microcrystals were systematically investigated, which show strong and colorful emissions (white, yellow, red) under ultraviolet excitation. An investigation on the photoluminescence (PL) properties of La2(WO4)3:Eu3+ with different Eu3+ doping levels revealed the tunable emissions and the optimized Eu3+ doping concentration of La2(WO4)3:Eu3+.