Structural, Linear and Third Order Nonlinear Optical Properties of Sol-Gel Grown Ag-CdS Nanocrystalline Thin Films

Khan, Ziaul Raza; Munirah,; Shkir, Mohd.; Alshammari, Abdullah S.; Ganesh, V.; AlFaify, S.; Gandouzi, M.

doi:10.1007/s11664-018-6832-2

Cited by 31 publications

(7 citation statements)

References 46 publications

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“…with crystallite size (nm) for the diferent doping concentrations of Co in the Cd 1 − x Co x O thin flms are shown in Figure 9. Te improved NLO behaviour of the synthesised samples is associated with improved polarizability and an enlarged carrier concentration for higher Co-content [38].…”

Section: Nonlinear Refractive Indexmentioning

confidence: 91%

“…Actually, the much higher polarizability observed for Co-doped CdO samples compared to pristine CdO samples resulted from the higher atomic mass of the substituted Co ions for the Cd ones. Table 4 shows the current and some of the reported values of a few metal sulphide/oxide flms for β, n 2 and χ (3) [40,41] and [42]. Nevertheless, for optical switching applications, the actual potency of these materials is heavily dependent on n 2 .…”

Section: Nonlinear Refractive Indexmentioning

confidence: 99%

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Role of Cobalt Doping on the Physical Properties of CdO Nanocrystalline Thin Films for Optoelectronic Applications

Bairy¹,

Somayaji²,

Marakala³

et al. 2022

Advances in Materials Science and Engineering

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In the current work, the authors aim to present an insight on the role of cobalt (Co) doping for the structural, morphological, and linear and nonlinear optical (NLO) properties of CdO thin films. The films were prepared using the spray pyrolysis (SP) technique, and the weight % of Co (x) was varied from 0–10. The structural properties of the films were confirmed by the powder X-ray diffraction (P-XRD) studies and are polycrystalline with a cubic structure and a lattice parameter of 0.4658 nm. As Co content in CdO films increases, cluster grain size and porosity decrease significantly, as seen in surface topographic and nanostructural analysis. Through the Burstein–Moss shift, the optical band gap “Eg” in Co: CdO film decreases from 2.52 to 2.05 eV with the increase in Co-doping. To study the NLO parameters, open aperture (OA) and closed aperture (CA) Z-scan measurements were performed using the diode-pumped solid-state continuous wave laser excitation (532 nm), and with the increased Co-content, the NLO parameters—nonlinear absorption coefficient (β∼10−3 cm/W), nonlinear refractive index n 2 ∼ 10−8 cm2/W), and the 3rd-order NLO susceptibility χ 3 ∼ 10−7 to 10−6 e.s.u.) values were determined and found to be enhanced. The maximum NLO parameters achieved in the present study with increasing Co concentration on CdO nanostructures prepared by the SP method are found to be the highest among the reported values and suggest that processed films are a capable material for optoelectronic sensor applications.

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Section: Nonlinear Refractive Indexmentioning

confidence: 91%

Section: Nonlinear Refractive Indexmentioning

confidence: 99%

Role of Cobalt Doping on the Physical Properties of CdO Nanocrystalline Thin Films for Optoelectronic Applications

Bairy¹,

Somayaji²,

Marakala³

et al. 2022

Advances in Materials Science and Engineering

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“…However, CBD as a low-cost and low-temperature technique could produce CdS thin films with high uniformity and large-scale area. In general, CBD is a direct and cheap method that enables the deposition of several chalcogenides including CdSe, ZnO, Sb 2 Se, Bi 2 Se, ZnS, and CuS where many parameters such as pH, precursor concentrations, and bath temperature could be employed to have different material shapes and properties [18][19][20][21][22][23]. Recently, many papers were published on different properties and features of bulk CdS grown using CBD [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Influence of Deposition Time on Structural, Morphological, and Optical Properties of CdS Thin Films Grown by Low-Cost Chemical Bath Deposition

El-Shaer,

Ezzat,

Habib

et al. 2023

Crystals

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CdS thin films were deposited on glass substrates employing low-cost and low-temperature chemical bath deposition (CBD). The effect of deposition time on the fabricated sample’s properties was investigated by XRD, SEM, EDX, Raman, UV-vis spectrophotometry, and PL spectroscopy. XRD results indicate the formation of cubic and hexagonal structures of CdS thin films. The calculated average crystal size ranged from 21–50 nm. SEM results indicate the formation of hierarchical nanoflakes where the nanoflakes are entangled with one another like plant roots. Raman study confirmed that the fabricated thin films have two distinct peaks that are centered at 298 cm−1 and 599 cm−1, which are characteristic vibration modes for CdS thin film. UV-vis absorption spectra indicate absorption band edges near 500 nm, which are related to the band gap values of CdS thin films. The estimated Eg of CdS thin films was reduced from 2.4 to 2.22 eV as the deposition time increased from 5 to 60 min. PL results show the main peak centered at 537 nm, its intensity decreasing as deposition time increases, indicating lower recombination of charge carriers. Our results reveal that CdS thin films are an excellent candidate for optoelectronic applications.

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“…CdS has two crystal structures, a metastable cubic phase (zinc blende) and a highly stable hexagonal phase (wurtzite), where thin films can be formed during these two phases based on growth conditions [11,12]. CdS thin films were deposited using several synthesis techniques such as spray pyrolysis [13], sputtering [14], hydrothermal method [12], chemical bath deposition (CBD) [15], thermal evaporation [11,16], chemical vapor deposition (CVD) [17], electrodeposition [18], and sol-gel deposition [19]. The hydrothermal technique has many advantages for growing CdS thin films, including low-cost, environment, high purity, compositional consistency of the thin film, and the simplicity of the method [20].…”

Section: Introductionmentioning

confidence: 99%

Advancement of Physical and Photoelectrochemical Properties of Nanostructured CdS Thin Films toward Optoelectronic Applications

et al. 2023

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CdS thin films were grown on an FTO substrate at different temperatures, employing the low-cost hydrothermal method. All the fabricated CdS thin films were studied using XRD, Raman spectroscopy, SEM, PL spectroscopy, a UV–Vis spectrophotometer, photocurrent, Electrochemical Impedance Spectroscopy (EIS), and Mott–Schottky measurements. According to the XRD results, all the CdS thin films were formed in a cubic (zinc blende) structure with a favorable (111) orientation at various temperatures. The Scherrer equation was used to determine the crystal size of the CdS thin films, which varied from 25 to 40 nm. The SEM results indicated that the morphology of thin films seems to be dense, uniform, and tightly attached to the substrates. PL measurements showed the typical green and red emission peaks of CdS films at 520 nm and 705 nm, and these are attributable to free-carrier recombination and sulfur vacancies or cadmium vacancies, respectively. The optical absorption edge of the thin films was positioned between 500 and 517 nm which related to the CdS band gap. For the fabricated thin films, the estimated Eg was found to be between 2.50 and 2.39 eV. According to the photocurrent measurements, the CdS thin films grown were n-type semiconductors. As indicated by EIS, resistivity to charge transfer (RCT) decreased with temperature, reaching its lowest level at 250 °C. Flat band potential and donor density were found to fluctuate with temperature, from 0.39 to 0.76 V and 4.41 × 1018 to 15.86 × 1018 cm−3, respectively, according to Mott–Schottky measurements. Our results indicate that CdS thin films are promising candidates for optoelectronic applications.

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Structural, Linear and Third Order Nonlinear Optical Properties of Sol-Gel Grown Ag-CdS Nanocrystalline Thin Films

Cited by 31 publications

References 46 publications

Role of Cobalt Doping on the Physical Properties of CdO Nanocrystalline Thin Films for Optoelectronic Applications

Role of Cobalt Doping on the Physical Properties of CdO Nanocrystalline Thin Films for Optoelectronic Applications

Influence of Deposition Time on Structural, Morphological, and Optical Properties of CdS Thin Films Grown by Low-Cost Chemical Bath Deposition

Advancement of Physical and Photoelectrochemical Properties of Nanostructured CdS Thin Films toward Optoelectronic Applications

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