Yang Junfeng, Song Lina, Wang Xiaoxue, Dong Jianchao, Gan Shucai, Zou Lianchun
College of Chemistry, Jilin University, Changchun 130026, PR China.
Dalton Trans. 2018 Jan 23;47(4):1294-1302. doi: 10.1039/c7dt04273f.
In this study, monodisperse and uniform β-NaYF hexagonal microtubes were successfully synthesized via a simple hydrothermal method without any organic surfactants, employing Y(OH)CO colloid spheres as precursors. The possible formation mechanism was studied on the basis of a series of time-dependent control experiments and its intrinsic crystal structure. The integrated emission intensity of β-NaYF:0.05Tb is almost 1.78 times stronger than that of α-NaYF:0.05Tb. In addition, the photoluminescence properties of β-NaYF:Ln (Ln = Eu, Tb, Tm, Sm, Ho) were studied in detail, and it was found that the photoluminescence color of β-NaYF:0.03Tm phosphor was close to the standard blue light (0.14, 0.08). Moreover, by co-doping the Tb and Eu ions into the β-NaYF host, multicolor tunable emissions were obtained due to the efficient energy transfer from Tb to Eu at 368 nm excitation. These merits demonstrate that this material may find potential application in color display fields.
在本研究中，以Y(OH)CO胶体球为前驱体，通过简单的水热法，在无任何有机表面活性剂的情况下成功合成了单分散且均匀的β-NaYF六方微管。基于一系列时间相关的对照实验及其固有晶体结构，研究了可能的形成机理。β-NaYF:0.05Tb的积分发射强度几乎比α-NaYF:0.05Tb强1.78倍。此外，详细研究了β-NaYF:Ln（Ln = Eu、Tb、Tm、Sm、Ho）的光致发光性能，发现β-NaYF:0.03Tm荧光粉的光致发光颜色接近标准蓝光（0.14, 0.08）。而且，通过将Tb和Eu离子共掺杂到β-NaYF基质中，在368 nm激发下，由于从Tb到Eu的有效能量转移，获得了多色可调发射。这些优点表明该材料可能在彩色显示领域找到潜在应用。
