An effect of precursor concentrations on the photodetection capabilities of CdS thin films for high-efficiency visible-light photodetector applications

Devi, Maya; Juliet, A. Vimala; Prasad, K. Hari; Alshahrani, Thamraa; Alshehri, A.M.; Shkir, Mohd.; AIFaify, S.

doi:10.1007/s00339-020-04067-3

Cited by 32 publications

(12 citation statements)

References 61 publications

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“…The Cd/S ratio is equal to 1:0.980, 1:0.959, 1:0.910, and 1:0.699 for powders obtained in precursor solutions with concentrations of 0.001, 0.01, 0.1, and 0.2 mol•dm −3 , respectively. Deviating from the equimolar composition was also recently reported by Devi et al 30 and Mohammed et al 31 for different methods of synthesis and concentration range.…”

Section: Resultsmentioning

confidence: 98%

Rational Design of the Electronic Structure of CdS Nanopowders

2023

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In this study, various techniques, such as energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Raman spectroscopy, and spectrophotometry, were used to analyze the properties of nanometric CdS particles synthesized with varying precursor concentrations. EDX analysis revealed the nonstoichiometric composition manifested by an increase in the Cd/S ratio from 1.02 up to 1.43 with increasing precursor concentration. The growth of lattice parameters and unit cell volume accompanying preferential crystallization of the hexagonal phase along with an increasing Cd/S ratio was confirmed by XRD analysis. This indicated the presence of interstitial cadmium in nonstoichiometric Cd 1+x S. The formation of shallow Cd i donor levels below the bottom edge of the conduction band impacts the bang-gap energy; a decrease from 2.56 to 2.21 eV along with increasing nonstoichiometry was observed. This is accompanied by a widening of the range of absorption of light, which creates conditions that can lead to an increase in the efficiency of redox reactions in photochemical processes.

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Section: Resultsmentioning

confidence: 98%

Rational Design of the Electronic Structure of CdS Nanopowders

2023

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“…The crucial parameters of the photodetector prototype prepared in the present work, viz. , Cu:CdS/FTO compared with various other photodetectors reported 3,11,21,31–38 are shown in Fig. 9.…”

Section: Resultsmentioning

confidence: 98%

Fast response and multi-color photodetection in p-type Cu:CdS thin films

V. S.,

Kumar,

et al. 2024

Mater. Adv.

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“…CdS-thin films can be prepared by various methodology such as spray pyrolysis [13], chemical bath deposition [14][15][16], chemical vapor deposition [17,18], electrodeposition, sol-gel [19,20], sputtering, molecular beam epitaxy [21], thermal vacuum evaporation method [22] etc. Inspite of number of techniques, uniformity, viability, coating on flexible substrates, upscaling etc are open problems.…”

Section: Introductionmentioning

confidence: 99%

Structural and Optical Studies on Sol-Gel Driven Spin-Coated CdS Thin Films

Aggarwal

Kaushik

2022

J. Phys.: Conf. Ser.

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Inorganic wide band gap semiconductors are considered as best for optoelectronic devices such as photovoltaic cells, photodetectors, thin film transistors etc. CdS is a more promising semiconductor due to its direct wide band-gap ∼ 2.42 eV and size dependent optical properties. In the present article, structural and optical properties of spin coated CdS thin films are investigated. CdS thin films are annealed at 400 °C for 60 minutes to improve crystalline quality. X-RAY diffraction pattern reveals (002) diffraction plane of wurtzite CdS. The optical properties are analyzed by UV-Visible-NIR spectroscopy. The optical band-gap of CdS thin films varies from 2.25 eV to 2.47 eV which depends on number of deposited layers and the annealing condition.

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An effect of precursor concentrations on the photodetection capabilities of CdS thin films for high-efficiency visible-light photodetector applications

Cited by 32 publications

References 61 publications

Rational Design of the Electronic Structure of CdS Nanopowders

Rational Design of the Electronic Structure of CdS Nanopowders

Fast response and multi-color photodetection in p-type Cu:CdS thin films

Structural and Optical Studies on Sol-Gel Driven Spin-Coated CdS Thin Films

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