Effects on the optical properties and conductivity of Ag–N co-doped ZnO

作者：Zhenchao Xu, Qingyu Hou, Lingfeng Qu · 发表于：International Journal of Modern Physics B · 年份：2016 · DOI：10.1142/s0217979217500084 · 被引用次数：14 · 研究领域：ZnO doping and properties、Ga2O3 and related materials、Copper-based nanomaterials and applications

Nowadays, the studies of the effects on the optical bandgap, absorption spectrum, and electrical properties of Ag–N co-doped ZnO have been extensively investigated. However, Ag and N atoms in doped systems are randomly doped, and the asymmetric structure of ZnO is yet to be explored. In this paper, the geometric structure, stability, density of states, absorption spectra and conductivity of pure and Ag–N co-doped Zn[Formula: see text]Ag[Formula: see text]O[Formula: see text]N[Formula: see text]([Formula: see text]=0.03125, 0.0417 and 0.0625) in different orientations are calculated by using plane-wave ultrasoft pseudopotential on the basis of density functional theory with GGA[Formula: see text]U method. Results show that the volume, equivalent total energy and formation energy of the doped system increase as the concentration of Ag–N co-doped Zn[Formula: see text]Ag[Formula: see text]O[Formula: see text]N[Formula: see text] increases at the same doping mode. The doped systems also become unstable, and difficulty in doping. At the same concentration of Ag–N co-doped Zn[Formula: see text]Ag[Formula: see text]O[Formula: see text]N[Formula: see text], the systems with Ag–N along the [Formula: see text]-axis orientation is unstable, and doping is difficult. The optical bandgap of Ag–N co-doped systems is narrower than that of the pure ZnO. At the same doping mode, the optical bandgap of the systems with Ag–N perpendicular to the [Formula: see text]-axis orientation becomes narrow...