Effect of Cd/S ratio on growth and physical properties of CdS thin films for photosensor application

Mohammed, Ibrahim M.S.; Gubari, Ghamdan M. M.; Huse, Nanasaheb P.; Dive, Avinash S.; Han, Sang Woo; Sharma, Ramphal

doi:10.1007/s10854-020-03543-z

Cited by 13 publications

(9 citation statements)

References 17 publications

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“…Overall, the absorbance edge, with regard to the threshold of charge transition between the highest nearly filled band and the lowest nearly empty band, 55 was blue-shifted toward a lower wavelength. This is similar to the studies by Mohammed et al 56 and Bashar et al 57 on the effects of increasing the annealing temperature, and this observation can be explained by the increasing amount of cadmium and sulfur since annealing triggered film densification and great improvement in the crystallinity.…”

Section: Resultssupporting

confidence: 91%

“…Overall, the absorbance edge, with regard to the threshold of charge transition between the highest nearly lled band and the lowest nearly empty band, 55 was blue-shied toward a lower wavelength. This is similar to the studies by Mohammed et al 56 and Bashar et al 57 on the effects of increasing the annealing temperature, and this observation can be explained by the increasing amount of cadmium and sulfur since annealing triggered lm densication and great improvement in the crystallinity. Based on the absorption spectra, the effective band gaps of ZnO NRs and ZnO NRs/CdS core-shell thin lms can be derived through Tauc plot using eqn (8) and extrapolating the linear portion of the curves of (ahn) 2 versus (hn).…”

Section: Optical Absorbance Spectra and Bandgap Determinationsupporting

confidence: 91%

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Growth-control of hexagonal CdS-decorated ZnO nanorod arrays with low-temperature preheating treatment for improved properties and efficient photoelectrochemical applications

et al. 2023

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Section: Resultssupporting

confidence: 91%

Section: Optical Absorbance Spectra and Bandgap Determinationsupporting

confidence: 91%

Growth-control of hexagonal CdS-decorated ZnO nanorod arrays with low-temperature preheating treatment for improved properties and efficient photoelectrochemical applications

et al. 2023

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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 and Mohammed et al for different methods of synthesis and concentration range.…”

Section: Resultsmentioning

confidence: 99%

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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“…It equaled 2.52, 2.50, and 2.61 eV for CdS/HNT-NH 2 , CdS/HNT-Azine, and Cd 0.7 Zn 0.3 S/HNT-Azine, respectively. The band gap of a bulk CdS is 2.4 eV [ 37 ]. A slight increase in band gap values in the case of CdS stabilized on modified clay could be due to the very small particles size of sulfide crystals.…”

Section: Resultsmentioning

confidence: 99%

Biodistribution of Quantum Dots-Labelled Halloysite Nanotubes: A Caenorhabditis elegans In Vivo Study

et al. 2021

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Halloysite is a promising building block in nanoarchitectonics of functional materials, especially in the development of novel biomaterials and smart coatings. Understanding the behavior of materials produced using halloysite nanotubes within living organisms is essential for their safe applications. In this study, quantum dots of different compositions were synthesized on the surface of modified clay nanotubes, and the biodistribution of this hybrid material was monitored within Caenorhabditis elegans nematodes. The influence of the modification agent as well as the particles’ composition on physicochemical properties of hybrid nanomaterials was investigated. Several microscopy techniques, such as fluorescence and dark-field microscopy, were compared in monitoring the distribution of nanomaterials in nematodes’ organisms. The effects of QDs-halloysite composites on the nematodes’ life cycle were investigated in vivo. Our fluorescent hybrid probes induced no acute toxic effects in model organisms. The stable fluorescence and low toxicity towards the organisms suggest that the proposed synthesis procedure yields safe nanoarchitectonic materials that will be helpful in monitoring the behavior of nanomaterials inside living cells and organisms.

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Effect of Cd/S ratio on growth and physical properties of CdS thin films for photosensor application

Cited by 13 publications

References 17 publications

Growth-control of hexagonal CdS-decorated ZnO nanorod arrays with low-temperature preheating treatment for improved properties and efficient photoelectrochemical applications

Growth-control of hexagonal CdS-decorated ZnO nanorod arrays with low-temperature preheating treatment for improved properties and efficient photoelectrochemical applications

Rational Design of the Electronic Structure of CdS Nanopowders

Biodistribution of Quantum Dots-Labelled Halloysite Nanotubes: A Caenorhabditis elegans In Vivo Study

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