A significant enhancement in visible-light photodetection properties of chemical spray pyrolysis fabricated CdS thin films by novel Eu doping concentrations

Shkir, Mohd.; Ashraf, I.M.; Chandekar, Kamlesh V.; Yahia, I.S.; Khan, Aslam; Algarni, H.; AlFaify, S.

doi:10.1016/j.sna.2019.111749

Cited by 80 publications

(19 citation statements)

References 86 publications

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“…The quantum efficiency is an additional factor used to analyse the performance of the device. The

can be defined as the fraction of incident photons which contribute to the external photocurrent [ [56] , [57] , [58] ].

here h is plank constant, c is light speed, R is responsivity, q is electron charge and

is used light wavelength.…”

Section: Resultsmentioning

confidence: 99%

Photosensitive activity of fabricated core-shell composite nanostructured p-CuO@CuS/n-Si diode for photodetection applications

Gunasekaran¹,

Thangaraju

Marnadu

et al. 2021

Sensors and Actuators A: Physical

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“…The quantum efficiency is an additional factor used to analyse the performance of the device. The

can be defined as the fraction of incident photons which contribute to the external photocurrent [ [56] , [57] , [58] ].

here h is plank constant, c is light speed, R is responsivity, q is electron charge and

is used light wavelength.…”

Section: Resultsmentioning

confidence: 99%

Photosensitive activity of fabricated core-shell composite nanostructured p-CuO@CuS/n-Si diode for photodetection applications

Gunasekaran¹,

Thangaraju

Marnadu

et al. 2021

Sensors and Actuators A: Physical

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“…Moreover, several researchers are focusing on CdS because it can be applied to devices, such as piezoelectric, photonic, and thin-film transistors [ 5 , 6 , 7 ]. CdS thin films are deposited using various techniques, such as “sputtering” [ 8 ], “molecular beam epitaxy (MBE)” [ 9 ], “chemical vapor deposition (CVD)” [ 10 ], “chemical bath deposition (CBD)” [ 11 ], and “spray pyrolysis” [ 12 ]. Each of these deposition techniques has its own set of advantages and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Variations in the Physical Properties of RF-Sputtered CdS Thin Films Observed at Substrate Temperatures Ranging from 25 °C to 500 °C

et al. 2022

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CdS films with a wide range of substrate temperatures as deposition parameters were fabricated on Corning Eagle 2000 glass substrates using RF magnetron sputtering. The crystallographic structure, microscopic surface texture, and stoichiometric and optical properties of each CdS film deposited at various substrate temperatures were observed to be highly temperature-dependent. The grown CdS thin films revealed a polycrystalline structure in which a cubic phase was mixed based on a hexagonal wurtzite phase. The relative intensity of the H(002)/C(111) peak, which represents the direction of the preferential growth plane, enhanced as the temperatures climbed from 25 °C to 350 °C. On the contrary, the intensity of the main growth peak at the higher temperatures of 450 °C and 500 °C was significantly reduced and exhibited amorphous-like behavior. The sharp absorption edge revealed in the transmission spectrum shifted from the long wavelength to the short wavelength region with the rise in the substrate temperature. The bandgap showed a tendency to widen from 2.38 eV to 2.97 eV when the temperatures increased from 25 °C to 350 °C. The CdS films grown at the temperatures of 450 °C and 500 °C exhibited glass-like transmittance with almost no interference fringes of light, which resulted in wide bandgap values of 3.09 eV and 4.19 eV, respectively.

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“…1024−1027 Shkir et al prepared Eu-doped CdS thin films by the spray pyrolysis method and investigated their optical and photoelectric properties. 1028 By varying the Eu doping concentration from 1 to 5 wt %, the direct bandgap could be tuned from 2.43 to 2.48 eV, which is attributed to electronic interactions between the 4f electrons of Eu and the s and p electrons of CdS. More importantly, at 5 wt % CdS:Eu, the photosensitivity increased almost 10-fold compared to undoped CdS.…”

Section: Photodetectorsmentioning

confidence: 94%

“…For UV–vis detection, semiconductors such as CdS, ZnO, and TiO 2 are commonly doped with rare-earth ions to enhance the photodetection performance. − Shkir et al prepared Eu-doped CdS thin films by the spray pyrolysis method and investigated their optical and photoelectric properties . By varying the Eu doping concentration from 1 to 5 wt %, the direct bandgap could be tuned from 2.43 to 2.48 eV, which is attributed to electronic interactions between the 4f electrons of Eu and the s and p electrons of CdS.…”

Section: Technological Applicationsmentioning

confidence: 99%

Rare-Earth Doping in Nanostructured Inorganic Materials

et al. 2022

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Impurity doping is a promising method to impart new properties to various materials. Due to their unique optical, magnetic, and electrical properties, rare-earth ions have been extensively explored as active dopants in inorganic crystal lattices since the 18th century. Rare-earth doping can alter the crystallographic phase, morphology, and size, leading to tunable optical responses of doped nanomaterials. Moreover, rare-earth doping can control the ultimate electronic and catalytic performance of doped nanomaterials in a tunable and scalable manner, enabling significant improvements in energy harvesting and conversion. A better understanding of the critical role of rare-earth doping is a prerequisite for the development of an extensive repertoire of functional nanomaterials for practical applications. In this review, we highlight recent advances in rare-earth doping in inorganic nanomaterials and the associated applications in many fields. This review covers the key criteria for rare-earth doping, including basic electronic structures, lattice environments, and doping strategies, as well as fundamental design principles that enhance the electrical, optical, catalytic, and magnetic properties of the material. We also discuss future research directions and challenges in controlling rare-earth doping for new applications.

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A significant enhancement in visible-light photodetection properties of chemical spray pyrolysis fabricated CdS thin films by novel Eu doping concentrations

Cited by 80 publications

References 86 publications

Photosensitive activity of fabricated core-shell composite nanostructured p-CuO@CuS/n-Si diode for photodetection applications

Photosensitive activity of fabricated core-shell composite nanostructured p-CuO@CuS/n-Si diode for photodetection applications

Variations in the Physical Properties of RF-Sputtered CdS Thin Films Observed at Substrate Temperatures Ranging from 25 °C to 500 °C

Rare-Earth Doping in Nanostructured Inorganic Materials

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