Influence of pH on the physical properties of CdS thin film and its photosensor application

In the present study, CdS thin films were produced on glass substrates by the chemical bath deposition method, and sodium sulfite was used to reduce the reaction rate. Based on the absorbance measurements, it was found that the energy band gaps of the films increased from 2.35 to 2.49 eV depending on the amount of inhibitor. It was also found that when the reaction rate decreased, the crystal structure of the films shifted from the cubic phase to the hexagonal phase in reference to the X-ray diffraction results. When CdS thin films had the hexagonal phase, it was seen in the scanning electron microscope images that pinholes and voids were not seen on the surface of the films. Surface roughness values were calculated using scanning electron microscope images, and these values were found to vary between 22 nm and 9 nm. topics: chemical bath deposition, thin films, CdS, inhibitor

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“…Thickness analysis of the produced thin films was done using the gravimetric method, and the related equation is given as [12] t = m ρA .…”

Section: Structural Analysis Of Cds Filmsmentioning

confidence: 99%

Effects of Sodium Sulphide as an Inhibitor on CdS Films Obtained by Chemical Bath Deposition

Önal

Altıokka

2023

Acta Phys. Pol. A

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“…CdS has emerged as a promising semiconductor material for optoelectronic devices and detectors thanks to its exceptional properties, such as a direct bandgap (∼2.4 eV), excellent transport characteristics, and high refractive index [ 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. The performance of CdS thin film-based devices is influenced by film thickness, grain size, and morphology [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Utilizing Gold Nanoparticle Decoration for Enhanced UV Photodetection in CdS Thin Films Fabricated by Pulsed Laser Deposition: Exploiting Plasmon-Induced Effects

Belaid,

Gezgin,

Basyooni-M. Kabatas

et al. 2024

Nanomaterials

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UV sensors hold significant promise for various applications in both military and civilian domains. However, achieving exceptional detectivity, responsivity, and rapid rise/decay times remains a notable challenge. In this study, we address this challenge by investigating the photodetection properties of CdS thin films and the influence of surface-deposited gold nanoparticles (AuNPs) on their performance. CdS thin films were produced using the pulsed laser deposition (PLD) technique on glass substrates, with CdS layers at a 100, 150, and 200 nm thickness. Extensive characterization was performed to evaluate the thin films’ structural, morphological, and optical properties. Photodetector devices based on CdS and AuNPs/CdS films were fabricated, and their performance parameters were evaluated under 365 nm light illumination. Our findings demonstrated that reducing CdS layer thickness enhanced performance concerning detectivity, responsivity, external quantum efficiency (EQE), and photocurrent gain. Furthermore, AuNP deposition on the surface of CdS films exhibited a substantial influence, especially on devices with thinner CdS layers. Among the configurations, AuNPs/CdS(100 nm) demonstrated the highest values in all evaluated parameters, including detectivity (1.1×1012 Jones), responsivity (13.86 A/W), EQE (47.2%), and photocurrent gain (9.2).

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“…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).…”

Section: Introductionmentioning

confidence: 99%

“…Many methods are employed to prepare CdS thin films, including vacuum evaporation (Shaban, et al, 2021), chemical deposition (Shkir, et al, 2020b), sputtering (Yadav, Barote and Masumdar, 2010), successive ionic layer adsorption and reaction (SILAR) (Deshmukh, Kheraj andPanchal, 2018, Taghizadeh Chari andFadavieslam, 2019), printing (An, et al, 2021), laser ablation (Wada, 2022), electrodeposition (Valencia and Baena, 2015), chemical bath techniques (Kakhaki, et al, 2022), solgel (Mohammed, et al, 2021), and chemical spray pyrolysis CSP (Vishwas, Shamala and Gandla, 2022). The characteristics of thin films and powders of CdS at the nanoscale depend on the dopant type, concentration, method of preparation/deposition, and pH application (Shkir, et al, 2020a).…”

Section: Introductionmentioning

confidence: 99%

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

Hamad

Faraj

Taha

2023

ARO

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This process of this paper is carried out using thechemical spraying method to produce homogeneous thin films ofpure cadmium sulfide-doped with silver at different percentagesof 1%, 3%, and 5% on glass and polyimide plastic substrates at300°C. The aim is to study the optical and structural properties of the samples and the effect of the silver doping rate on films producedwith these properties. Due to X-ray diffraction studies, all filmscreated had a hexagonal phase, and it was noticed that they had avery precise structure free of holes or cracks. The obtained crystalsize ranged between 22.74 nm and 55.05 nm for different substrates, and the prominent plane was (002). From the optical properties, all films exhibited transmission higher than 60%, thus showing a lowabsorption, which makes them be used as light-permeable layers in the Solar Cell system. In addition, emission peaks were revealed by photo luminescence spectra examination at wavelengths ranging between (542.94 nm) and (546.02 nm), which led to calculate the energy gap (Eg). of the produced films, ranged between (2.27 eV) and (2.28 eV) for the different substrates.

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Influence of pH on the physical properties of CdS thin film and its photosensor application

Cited by 16 publications

References 42 publications

Effects of Sodium Sulphide as an Inhibitor on CdS Films Obtained by Chemical Bath Deposition

Effects of Sodium Sulphide as an Inhibitor on CdS Films Obtained by Chemical Bath Deposition

Utilizing Gold Nanoparticle Decoration for Enhanced UV Photodetection in CdS Thin Films Fabricated by Pulsed Laser Deposition: Exploiting Plasmon-Induced Effects

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

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