期刊
OPTICS AND LASER TECHNOLOGY
卷 146, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2021.107579
关键词
NiO; Transparent conducting oxides; Metal oxides, nonlinear optical properties
The study investigated the effect of Bi doping on NiO thin films, showing that Bi doping leads to a decrease in grain size and surface roughness, as well as an increase in optical band gap. The films exhibit high transparency and nonlinear optical susceptibility values fall within a certain range.
Nickel Oxide (NiO) based thin films have drawn widespread attention in optoelectronics applications because of their superior optical and electrical properties. Herein, the effect of Bi doping on the microstructure, phase evolution, composition, electrical and optical properties of NiO thin films are reported. Bi-doped NiO (0-7.5 %) thin films were deposited on glass substrates by the cost-effective spin coating technique. The X-ray diffraction studies showed that the undoped and 2.5 % Bi-doped films develop cubic structure and 5.0 % and 7.5 % of Bi doped films formed an amorphous nature. A systematic decrease in the grain size as well as surface roughness with Bi doping was noticed through AFM analysis. The films are highly transparent (80 %) and the optical band gap increases from 3.45 eV for undoped NiO to 3.99 eV for 7.5 % Bi-doped NiO thin film. The nonlinear optical susceptibility values are found to be in the range of 0.034 x 10(-11) to 2.72 x 10(-11) esu.
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