期刊
OPTICAL MATERIALS
卷 120, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.optmat.2021.111387
关键词
Cu doped NiO; Nebulizer spray pyrolysis; Thin films; Photodetector
资金
- Taif University Researchers Supporting Project, Taif University, Taif, Saudi Arabia [TURSP-2020/24]
In this study, pure NiO and NiO:Cu-based photodetectors were fabricated with different concentrations of Cu dopants using a cost-effective nebulizer spray pyrolysis technique. The optical and UV sensing properties of the films were characterized, showing that 1.0% Cu doping significantly improved the physical properties of the NiO:Cu films, making them suitable for high-speed optoelectronic devices. The possible mechanism of photodetector performance under air and UV illumination was also discussed.
In this work, pure NiO and NiO:Cu based photodetectors with different concentrations of Cu dopants (0, 0.5,1.0, and 1.5 wt%) were coated on glass substrates by using a simple, low cost nebulizer spray pyrolysis technique. Their structural, morphological, optical (UV-Vis absorption and photoluminescence), and ultraviolet (UV) sensing features were characterized with state-of-the-art analytical techniques. The structural studies confirm that the prepared films have crystalline nature and possess a cubic structure. From the absorption measurement, the optical bandgap (E-g) of the deposited films decreases with the increase in Cu dopants. Photoluminescence study illustrates that 1.0% of Cu doping significantly improves the physical property of the NiO:Cu films and also its UV sensing study suggests that the 1.0% of NiO:Cu film could be better suited for high-speed optoelectronic devices due to their high Responsivity (0.202 AW(-1)), External quantum efficiency (47%), and Detectivity (5.9 x 10(9) jones) values. A possible mechanism of the photodetector performance under air and UV illumination is also discussed in this work.
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