物理学报2009，Vol.58Issue(11)：8002-8007,6.
Al掺杂ZnO粉体的第一性原理计算及微波介电性质
First-principles calculation of microwave dielectric properties of Al-doping ZnO powders
黄云霞 1曹全喜 1李智敏 1李桂芳 1王毓鹏 1卫云鸽1
作者信息
- 1. 西安电子科技大学技术物理学院,西安,710071
- 折叠
摘要
Abstract
The band structure and dielectric properties of the pure ZnO and the Al-doped ZnO were studied by using a first-principle uhrasoft pseudopotential approach of the plane wave based on the density functional theory. The pure ZnO and the Al-doped ZnO powders were prepared via the solid state reaction at 600℃ with holding time of 1.5 h. The prepared powders were characterized by X-my diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The dielectric parameters were determined by the vector network analyzer in the frequency range of 8.2-12.4 GHz. Results show that the volume of super-cell has no obvious change and the Fermi energy level is introduced into conduction band through introducing A1 ions. XRD patterns indicate that all the samples have pure wurtzite structure of ZnO. It is found that A1 ions form the substitutional impurity in ZnO crystal according to the result of XPS. The experimental results show that both the real part ε' and imaginary part ε" of permittivity of the samples are increased by Al doping, in agreement with the result of calculation.关键词
Al掺杂ZnO/介电性质/能带结构/第一性原理Key words
Al-doped ZnO/dielectric properties/band structure/first-principles分类
化学化工引用本文复制引用
黄云霞,曹全喜,李智敏,李桂芳,王毓鹏,卫云鸽..Al掺杂ZnO粉体的第一性原理计算及微波介电性质[J].物理学报,2009,58(11):8002-8007,6.
