AI Article Synopsis
- CdS thin films were created using a chemical bath deposition method at 90°C, and their properties were analyzed through different treatments, namely annealing and CdCl2 treatment.
- XRD and SEM techniques revealed that untreated films had poor crystallinity, whereas annealed films showed cubic crystallinity but with small grain sizes; CdCl2 treatment improved crystallinity and resulted in a smoother surface.
- Optical studies indicated that the energy gap of the films decreased with annealing, and the CdCl2 treated films had fewer defects, leading to enhanced properties overall.
Article Abstract
CdS thin films were prepared by chemical bath deposition (CBD) at 90 'C. The influence of annealing and CdCl2 treatment on CBD-CdS thin film was studied. XRD and SEM were used to study the crystal structure and surface morphology ofthe films. The untreated CBD-CdS films had poor crystallinity; the CdS thin film made with annealing treatment had cubic crystallinity but small grain size. After the CdCl2 treatment, these films recrystallized to the hexagonal phase, resulting in a better crystallinity, and smooth surface morphology. Optical properties were studied by absorption spectrum. The energy gap of the films was found to decrease by annealing, and the CBD-CdS made with CdCl2 treatment had a lower density of planar defects. In conclusion, the CdCl2 treatment can improve the properties of the CdS thin films.
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