Journal
OPTIK
Volume 219, Issue -, Pages -Publisher
ELSEVIER GMBH
DOI: 10.1016/j.ijleo.2020.165204
Keywords
Ni doped ZnO; Absorption spectrum; Electrochemical properties; First principle calculations
Categories
Funding
- Henan International Science and Technology Cooperation Program [152102410035]
- Program for Science and Technology Innovation Talents in Universities of the Henan Province [17HASTIT026]
- Education Department of the Henan Province [16A430005]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT_16R21]
Ask authors/readers for more resources
Pure and Ni-doped ZnO nanorod array films were prepared by the hydrothermal method. The effects of Ni doping on the phase composition, microstructure, and optical and electro-chemical properties of ZnO were investigated. The main crystalline phase of the powders before and after Ni doping is wurtzite ZnO. The luminescent peaks are significantly reduced after Ni doping. The light transmission and is the strongest when the doping concentration is 2 %. The light absorption spectrum confirms that the band gap decreased first and then decreased with the increase of Ni2+ doping concentration. According to the M-S (Mott - Schottky) plots, the Ni-doped ZnO is an n-type semiconductor. The current density initially increases with the increased Ni doping amount, and then decreases. First-principles calculation results of nickel-doped zinc oxide show that the energy level of impurities is formed after nickel ions replace zinc ions, which causes the conduction band is shifted down and the band gap is reduced. The impurity energy level causes a slight upward shift in the valence band, which increases the band gap. The calculated results are consistent with the experimental results.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available