One step synthesis of pure cubic and monoclinic HfO2 nanoparticles: Correlating the structure to the electronic properties of the two polymorphs
One step synthesis of pure cubic and monoclinic HfO2 nanoparticles: Correlating the structure to the electronic properties of the two polymorphs
复制标题
DOI：
10.1063/1.4766272
复制
发表时间：
2012-11
影响因子：
3.2
通讯作者：
P. Rauwel;E. Rauwel;C. Persson;M. Sunding;A. Galeckas
中科院分区：
文献类型：
--
作者：
P. Rauwel;E. Rauwel;C. Persson;M. Sunding;A. Galeckas
二氧化铪是一种宽带隙、高介电常数的材料，基于二氧化铪的化合物已经被集成到微电子器件中。纯立方HfO2相是有希望的，因为它呈现出更高的介电常数（κ > 25），但需要通过添加二价或三价掺杂剂来稳定，这反过来改变HfO2的电子性质。在这里，我们采用一锅法合成的方法来生产未掺杂的立方和单斜HfO2纳米粒子的溶剂单独选择。从透射电子显微镜研究这些纳米粒子的平均尺寸估计为约2.6 nm。我们提出了一个研究的形态和微观结构，并证明了存在一个强大的可见光致发光链接到纳米尺寸的颗粒。此外，在等效条件下合成这两个相的HfO2提供了直接比较两种多晶型物的化学组成和电子结构的手段。因此，我们可以通过实验...
Hafnium dioxide is a wide band-gap, high-κ material, and Hafnium based compounds have already been integrated into micro-electronic devices. The pure cubic HfO2 phase is promising as it presents a higher permittivity (κ > 25), but needs to be stabilized by addition of divalent or trivalent dopants, which in turn modify the electronic properties of HfO2. Here, we employ a one-pot synthesis approach to produce undoped cubic and monoclinic HfO2 nanoparticles by choice of solvent alone. The average size of these nanoparticles from transmission electron microscopy studies was estimated to be around 2.6 nm. We present a study of the morphology and microstructure and also demonstrate the presence of a strong visible photoluminescence linked to the nanosize of the particles. Furthermore, the synthesis in equivalent conditions of these two phases of HfO2 provides means for direct comparison of the chemical composition and electronic structures of the two polymorphs. This has therefore allowed us to experimentally ...