当前位置: X-MOL 学术Photochem. Photobiol. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Novel sol–gel fabrication of Yb3+/Tm3+ co-doped β-NaYF4 thin films and investigation of their upconversion properties†
Photochemical & Photobiological Sciences ( IF 3.1 ) Pub Date : 2018-07-30 00:00:00 , DOI: 10.1039/c8pp00295a
Anna L. Pellegrino 1, 2, 3, 4, 5 , Maria R. Catalano 1, 2, 3, 4, 5 , Paolo Cortelletti 5, 6, 7, 8, 9 , Giacomo Lucchini 5, 6, 7, 8, 9 , Adolfo Speghini 5, 6, 7, 8, 9 , Graziella Malandrino 1, 2, 3, 4, 5
Affiliation  

An innovative sol–gel process, using a mixture of Na(hfa)·tetraglyme and RE(hfa)3·diglyme (RE = Y, Yb, Tm) complexes, has been optimized to produce upconverting β-NaYF4:Yb3+/Tm3+ thin films. The X-ray diffraction (XRD) analysis confirms that the new sol–gel preparation route yields reproducibly and selectively the hexagonal Na(Y1.5Na0.5)F6 structure (β-NaYF4) without any impurity phases, since no peaks of the cubic NaYF4, YOF, Y2O3 or NaF phases were observed. This final goal has been achieved through an accurate optimization of the operative parameters such as the molar ratio of the precursor mixture, the aging time of the sol, the spin coating procedure and the annealing temperature. Field-emission scanning electron microscopy (FE-SEM) images indicate that the morphology of the surfaces, grain dimensions and thickness are strongly related to the processing parameters, with the hexagonal phase films having a very uniform morphology. Energy dispersive X-ray (EDX) analyses established the film composition in terms of dopant ions, which are responsible for the upconverting properties of the material. Luminescence measurements under laser excitation at 980 nm confirmed the promising upconversion properties of the β-NaYF4:Yb3+/Tm3+ films.

中文翻译:

镱的新颖的溶胶-凝胶加工3+ / TM 3+共掺杂β-NaYF 4薄膜和其上转换特性的调查

一个创新的溶胶-凝胶法,使用Na(HFA)的混合物·四甘醇二甲醚和RE(HFA)3 ·二甘醇二甲醚(RE = Y,镱,铥)配合物,已被优化,以产生上变频β-NaYF 4:YB 3+ / Tm 3+薄膜。的X射线衍射(XRD)分析证实,在新的溶胶-凝胶制备路线的产率可重复地和有选择地将六边形的Na(Y 1.5的Na 0.5)的F 6结构(β-NaYF 4)而没有任何杂质相,因为没有的峰立方NaYF 4,YOF,Y 2 O 3观察到NaF或NaF相。通过精确优化操作参数(例如前体混合物的摩尔比,溶胶的老化时间,旋涂步骤和退火温度)可以实现此最终目标。场发射扫描电子显微镜(FE-SEM)图像表明,表面形貌,晶粒尺寸和厚度与加工参数密切相关,六角相膜具有非常均匀的形貌。能量色散X射线(EDX)分析根据掺杂离子确定了膜的成分,这些离子负责材料的上转换特性。在980 nm激光激发下的发光测量证实了β-NaYF的有前途的上转换性能4:YB 3+/ Tm 3+胶卷。
更新日期:2018-07-30
down
wechat
bug