Influence of Thickness on the Optical Properties of Cadmium Sulphide Thin Film Deposited by Chemical Bath Deposition Technique

Okorie, Ogba Agba; Buba, A; Ramalan, A

doi:10.9734/psij/2017/35738

Cited by 9 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The refractive index, n and extinction coefficient, k of CdS film are very important parameters when we are discussing the application of CdS films as window/buffer layer. The influence of film thickness on n and k needs to be understood in details as these parameters are strongly associated with the electronic polarization of particles for the optical materials [64]. The reflectance R (= 1 − absorbance − transmittance) [65] of a film having a complex refractive index of n*(= n + ik) is given by [66] The absorption coefficient α was calculated using Beer Lambert's formula [67] and the extinction coefficient of the CdS film from the following equation [34].…”

Section: Refractive Index and Extinction Coefficient Of Cds Thin Filmsmentioning

confidence: 99%

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

2020

View full text Add to dashboard Cite

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.

show abstract

Section: Refractive Index and Extinction Coefficient Of Cds Thin Filmsmentioning

confidence: 99%

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

2020

View full text Add to dashboard Cite

show abstract

“…The properties of Semiconductor materials are very important for determining their applicability in various fields. Moreover, in nanoscale some of the properties have been affected that made it differ from the bulk material especially the bandgap [1][2][3][4]. Since it is possible to adjust or tailor their electrical and optical properties especially when physical dimensions are reduced to a few nanometers which these properties depend upon, that makes them useful for application in optoelectronics, nonlinear optics and photoelectrochemical solar cell devices [1,[4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Studies on the Optical Dispersion Parameters and Electronic Polarizability of Cadmium Sulphide Thin Film

Okorie¹,

Buba

2023

AJR2P

View full text Add to dashboard Cite

Thin film of Cadmium Sulphide (CdS) was deposited onto a precleaned transparent glass substrate by chemical bath deposition technique from a bath containing Cadmium acetate, ammonium acetate, thiourea and ammonium hydroxide. The deposition time was varied from 10 minutes to 50 minutes at an interval of 20 minutes keeping the bath at a constant temperature of using 78HW-1 constant magnetic stirrer. CdS thin film was characterized by UV-Visible spectrophotometer within the wavelength range of 280 nm – 920 nm using Single – Beam Helios Omega UV – VIS spectrophotometer. The optical parameters; extinction coefficient, refractive index and dielectric constant of CdS thin film were analyzed from the absorption spectra and were found to be affected by the deposition time. The optical band gap energy was obtained by Tauc’s equation and were found to decrease from 3.78 eV – 3.70 eV as the deposition time increases. The dispersion parameters (dispersion energy , oscillation energy , moment of optical dispersion spectra and , static dielectric constant and static refractive index ) were calculated using theoretical Wemple-DiDomenico model. The result show that only and behaved differently but other parameters increase as the deposition time increases. The oscillator strength , oscillator wavelength , high frequency dielectric constant and high frequency refractive index were calculated using single Sellmeier oscillator model. While behaved differently other parameters increase as the deposition time increased. Also, Lattice dielectric constant , N/m* and plasma resonance frequency were equally obtained. While decrease with increase in deposition time, N/m* increase with deposition time. The electronic polarizability of CdS thin film was estimated by Lorenz - Lorentz equation and Clausius Mossotti local field polarizability model. The value is an indication that the films showed good response on the application of photon energy. However, its response reduces as the deposition time increases.

show abstract

“…Various chemical and physical methods are used to deposit CdS thin films, for example, thermal evaporation [11,12], chemical bath deposition (CBD) [13][14][15], pulsed direct current magnetron sputtering [16], electrochemical atomic layer deposition [17], hot wall deposition method [18], chemical surface deposition [19], screen printing [20], molecular beam epitaxy (MBE) [21 [21]] etc. In all these methods, much effort has been devoted to obtaining high-quality CdS thin film by optimizing various parameters such as deposition time and substrate temperature.…”

Section: Introductionmentioning

confidence: 99%

Morphology and optical properties of CdS thin films prepared by Physical Vapor Deposition method

Вакалюк

Yavorskiy²,

Nykyruy³

et al. 2022

Phys. Chem. Solid St.

View full text Add to dashboard Cite

The optical properties of cadmium sulfide thin films obtained by thermal evaporation in vacuum were studied. The stoichiometric compositions of the binary compound previously synthesized from high-purity powders of the initial components were used. Films of different thicknesses deposited on a glass substrate were investigated using scanning electron microscopy and absorption coefficient was defined by the Swanepoel method. It was found that with increasing film thickness, surface formations decrease and at a thickness of 1 μm the film surface is continuous. It is determined that thin films of cadmium sulfide have optimal optical parameters for use as photovoltaic buffer layer. All the obtained films except the film with a thickness of 1215 nm show the usual interference pattern in the reflection spectra.

show abstract

Influence of Thickness on the Optical Properties of Cadmium Sulphide Thin Film Deposited by Chemical Bath Deposition Technique

Cited by 9 publications

References 0 publications

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

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

Studies on the Optical Dispersion Parameters and Electronic Polarizability of Cadmium Sulphide Thin Film

Morphology and optical properties of CdS thin films prepared by Physical Vapor Deposition method

Contact Info

Product

Resources

About