Structural, surface morphological and optical properties and their correlation with the thickness of spin coated superior quality CdS thin film synthesized using a novel chemical route

Abstract

Cadmium sulfide (CdS) is considered as a superior buffer/window layer in thin-film solar cells apart from its various applications. The thickness of the buffer/window layer that defines the interface between the absorber layer is very important and needs to be thoroughly investigated for optimized device performance, particularly when a novel synthesis route and deposition technique is used. This manuscript presents the investigation on the various structural, morphological, and optical parameters and their correlation with the thickness of CdS thin film synthesized using a novel thiol-amine cosolvent with the help of Triton-X 100 surfactant. Spin coating technique is used to deposit CdS thin-films having thicknesses ranging from 100 to 300 nm on a glass substrate. X-ray diffraction (XRD) exposed the polycrystalline nature of the CdS films. All the diffraction peak intensities were found to increase with the thickness. Structural parameters like dislocation density, lattice strain, and crystallites per unit area calculated from the XRD data were found superior to those parameters for CdS films synthesized through various chemical routes, and the parameters indicated a positive correlation of the degree of crystallinity on the thickness. Similarly,surface morphology and optical properties of CdS films that were investigated by the scanning electron microscope (SEM) and UV-VIS spectrophotometer, were also dependent on film thickness. These results show that CdS thin film with superior crystallinity can be synthesized using thiol-amine cosolvent along with the Triton-X 100 surfactant and deposited by low-cost spin-coating on glass substrate. Moreover, the thickness variation appeared to be a single tool for obtaining application-specific various properties of CdS thin-film.

Structural and Optical Properties of Interfacial InSe Thin Film

“…The complex dielectric constant, on the other hand, relates to k and n . The values of ε r and ε i can be calculated using the following equations, respectively ,− : ε r = n 2 − k 2 ε i = 2 n k …”

Encapsulated Passivation of Perovskite Quantum Dot (CsPbBr3) Using a Hot-Melt Adhesive (EVA-TPR) for Enhanced Optical Stability and Efficiency

“…The wavelength-dependent functions k(λ) and n(λ) are presented in Figure 7a,b, respectively, for the pure and composite thin films. The profiles were identical to those of the The profiles of the absorption coefficients of both films are shown as a function of wavelength in Figure 6 and were calculated using α = 2.303xA l [38][39][40], where A is the absorbance and l is the thickness of the film. The features of α(λ) are closely related to the absorbance spectra.…”

“…) [38][39][40], where A is the absorbance and l is the thickness of the film. The features of α(λ) are closely related to the absorbance spectra.…”

Structural and Optical Properties of Cadmium Sulfide-doped Silver Deposited on Glass and Polymer Substrates by Chemical Spray Pyrolysis

“…Due to their capacity to alter the bandgap, noble metals, including gold (Au), copper (Cu), and silver (Ag), have been regarded as the most promising possibilities among these (Bora, et al, 2021) and reduce resistivity while also produce structural changes. A crucial factor for solar cell window layer materials is low resistance and good transmission when combined with p-type semiconductor absorber thin films such as CdTe, Cu 2 S (Ojeda- Barrero, et al, 2018), CuInSe 2 (Rahman, Hossain and Ismail, 2020), CdSe, and PbS (Aboud, et al, 2019). CdS is well known for its n-type wide band gap, which makes it an appropriate window layer counterpart for solar cell applications (Manthrammel, et al, 2020, Nazir, et al, 2014.…”

“…Thus, CdS has wide applications in optoelectronic device technologies, including optical filters, LEDs (Ahmed, et al, 2021a), lasers (Ikhmayies, 2020), photocatalysis (Manthrammel, et al, 2020), photodetectors (Mohammed, et al, 2021), nonlinear integrated optical devices (Rahman, Hossain and Ismail, 2020), and multicolor optical switches (Shkir, et al, 2020b).…”