Selective growth and upconversion photoluminescence of Y-based fluorides: from NaYF4: Yb/Er to YF3: Yb/Er crystals
Selective growth and upconversion photoluminescence of Y-based fluorides: from NaYF4: Yb/Er to YF3: Yb/Er crystals
复制标题
Y基氟化物的选择性生长和上转换光致发光：从NaYF4:Yb/Er到YF3:Yb/Er晶体
DOI：
10.1088/1361-6528/abb627
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发表时间：
2020
期刊：
影响因子：
3.5
通讯作者：
Erjun Liang
中科院分区：
文献类型：
--
作者：
Juan Xie;Wenbo Hu;Dan Tian;Yang Wei;Guangchao Zheng;Ling Huang;Erjun Liang
Y基氟化物已被认为是上转换光致发光（UC-PL）最有效的主体材料。在此，我们生产了一系列具有特定晶体结构、形状和尺寸的Yb/Er掺杂Y基氟化物。选择性生长过程由我们预先设计的表面活性剂 4, 4′-((2,5-bi's (2-(diethamino) ethoxy) -1,4-phenene) bis (ethyne-2,1-diyl)) di苯甲酸 (DBA) 和选择性溶剂控制。结果表明，高纯度六方微棱柱和立方微球NaYF4：Yb/Er可以分别在低和高DBA含量的水中选择性生长，而在乙醇中只能获得斜方纳米线和YF3：Yb/Er微花。最后，所有这些材料都表现出很强的UC-PL信号，而NaYF4:Yb/Er六方微棱柱的UC发射强度远高于立方微球和斜方YF3纳米线和微花的UC发射强度。该工作打破了晶体生长习性的内在限制，为具有特定形状、尺寸、晶相和高UC-PL效率的Y基氟化物的选择性晶体生长提供了一种新方法，并有可能推广到其他相关材料的受控合成。
Y-based fluorides have been recognized as most efficient host materials for upconversion photoluminescence (UC-PL). Herein, we have produced a series of Yb/Er doped Y-based fluorides with specific crystal structures, shapes and sizes. The selective growth process is governed by our pre-designed surfactant 4, 4′-((2,5-bi’s (2-(diethylamino) ethoxy) −1,4-phenylene) bis (ethyne-2,1-diyl)) dibenzoic acid (DBA) and selective solvents. It is shown that highly pure hexagonal microprisms and cubic microspheres of NaYF4: Yb/Er could be selectively grown in water at low and high content of DBA, respectively, while only orthorhombic nanowires and microflowers of YF3: Yb/Er could be obtained in ethanol. Finally, all these materials obtained exhibit strong UC-PL signal while the UC emission intensity of the NaYF4: Yb/Er hexagonal microprisms is much higher than those of the cubic microspheres and orthorhombic YF3 nanowires and microflowers. This work provides a novel method for selective crystal growth of Y-based fluorides with specific shape, size, crystal phase and highly UC-PL efficiency by breaking the intrinsic limitation of crystal growth habit, which could be possibly extended to the controlled synthesis of other related materials.