A facile spray pyrolysis fabrication of Sm:CdS thin films for high-performance photodetector applications

Shkir, Mohd.; Ashraf, I.M.; Khan, Aslam; Khan, Mohd Taukeer; El‐Toni, Ahmed Mohamed; AlFaify, S.

doi:10.1016/j.sna.2020.111952

Cited by 106 publications

(39 citation statements)

References 67 publications

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“…8, which is in line with the bandgap described above [37] . That is much the same as the value previously revealed for CdS thin film [38] , CdS:Sm 2.4 eV [39] , Significantly more than CdS:Gd 2.3 eV [40] and bulk CdS 2.42 eV [41] . The Al-doped CdS band gap energy increases by about 0.09 eV by the increased of Al content to 20% which confirming the blue shift observed on the absorption edge spectra absorption.…”

Section: Fig 5 Absorption Index(k) Of Cds: Xal (X=0 1 5 10 15 and 20 Wt %) Nanostructuresupporting

confidence: 90%

Synthesis, structure, and optical properties of nanopowders CdS: xAl (x=0, 1, 5, 10, 15 and 20%) via the sol–gel technique

Assim

2021

Egyptian Journal of Solids

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The nanocrystalline Al-doped CdS semiconductors were produced accurately by the sol-gel calcination process. The aluminum was added with different percent's (0, 1, 5, 10, 15, and 20 wt%) to the synthesized CdS. Both FT-Raman analysis and UV-VIS-NIR absorption measurements were utilized to characterize the studied semiconductors' structural and optical characteristics. The detected X-ray diffraction (XRD) patterns of the prepared CdS present a polycrystalline structure, and Al-doping does not significantly impact this range. Optical bandgaps were determined for undoped and Al-doped CdS, showing a significant change with the percentage of Al-dopants. With increasing Al-doping up to (20 percent), the optical bandgap for CdS (2.38 eV) grows to reach (2.47 eV) and the allowed transitions were found to be direct for the investigated samples. The blue shift may be the reason for the optical bandgap variations. Scanning Electron Microscope (SEM) micrographs were performed to establish the Al-doped CdS nanostructure to identify the morphological characteristics.

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Section: Fig 5 Absorption Index(k) Of Cds: Xal (X=0 1 5 10 15 and 20 Wt %) Nanostructuresupporting

confidence: 90%

Synthesis, structure, and optical properties of nanopowders CdS: xAl (x=0, 1, 5, 10, 15 and 20%) via the sol–gel technique

Assim

2021

Egyptian Journal of Solids

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“…The maximum outcome of quantum efficiency ensures the photo conducing nature of the present device. The specific detectivity is a key factor which is mostly influenced by dark current and it can be calculated from the following equation [ [59] , [60] , [61] , [62] ].

…”

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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“…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 facile spray pyrolysis fabrication of Sm:CdS thin films for high-performance photodetector applications

Cited by 106 publications

References 67 publications

Synthesis, structure, and optical properties of nanopowders CdS: xAl (x=0, 1, 5, 10, 15 and 20%) via the sol–gel technique

Synthesis, structure, and optical properties of nanopowders CdS: xAl (x=0, 1, 5, 10, 15 and 20%) via the sol–gel technique

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

Rare-Earth Doping in Nanostructured Inorganic Materials

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