An in-depth investigation of physical properties of Nd doped CdS thin films for optoelectronic applications

Chandekar, Kamlesh V.; Shkir, Mohd.; Alshahrani, Thamraa; Khan, Aslam; AlFaify, S.

doi:10.1016/j.cjph.2020.08.007

Cited by 18 publications

(8 citation statements)

References 60 publications

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“…The depicted samples exhibited band edge emission around 455 nm, and this is a phenomenon resulting from the recombination of excited electrons that become trapped at shallow levels, forming bound electron–hole pairs. On the other hand, the peak at 658 nm is associated with sulfur vacancies induced by doping, occurring at the transition level. , The significant peak observed at 490 nm may arise from interband transitions, which could result from sulfur-vacancy donors transitioning to the valence band and donor–acceptor recombination. The peak at 581 nm is likely influenced by interstitial defects present in the material.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, the peak at 658 nm is associated with sulfur vacancies induced by doping, occurring at the transition level. 57 , 58 The significant peak observed at 490 nm may arise from interband transitions, which could result from sulfur-vacancy donors transitioning to the valence band and donor–acceptor recombination. The peak at 581 nm is likely influenced by interstitial defects present in the material.…”

Section: Resultsmentioning

confidence: 99%

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Morphological, Photoluminescence, and Electrical Measurements of Rare-Earth Metal-Doped Cadmium Sulfide Thin Films

Azhar,

Nowsherwan,

Iqbal

et al. 2023

ACS Omega

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This work is aimed at investigating the viability of utilizing cadmium sulfide (CdS) as a buffer layer in CdTe solar cells by analyzing and assessing its optical, photoluminescence, morphological, and electrical properties. These films were fabricated using a thermal coating technique. Optical microscopy was used to observe the changes in morphology resulting from the doping of rare-earth metals such as samarium (Sm) and lanthanum (La) to CdS, while the granular-like structure of the sample was confirmed by scanning electron microscopy. The objective of incorporating Sm and La ions into CdS was to enhance photoconductivity and optimize the optical bandgap, aiming to create a viable charge transport material for photovoltaic devices with enhanced efficiency. Through that process, a noticeable decrease in transmission, from approximately 80 to 68% in the visible region, was observed. Additionally, the bandgap value was reduced from 2.43 to 2.27 eV. Furthermore, during the analysis of the photoluminescence spectra, it was observed that emission peaks occurred in the visible region. These emissions were attributed to electronic transitions that took place via band-to-band and band-to-impurity interactions. The electrical measurements showed an enhancement in conductivity due to the decrease in the bandgap. This notable consequence of the doped materials suggests their utilization in photovoltaic systems.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Morphological, Photoluminescence, and Electrical Measurements of Rare-Earth Metal-Doped Cadmium Sulfide Thin Films

Azhar,

Nowsherwan,

Iqbal

et al. 2023

ACS Omega

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“…[ 50 ] The information about the spin–phonon interaction coupling at the surface of the thin films could be obtained by the reciprocal of Q . [ 51 ] The estimated values of Q are included in Figure 11. The value of Q signifies a higher crystal quality with a stronger electron–phonon coupling, which is found for the Cu‐5 sample among the CMZS thin films.…”

Section: Resultsmentioning

confidence: 99%

Spectroscopic investigation of Cu_xMg_0.2−xZn_0.8S (x = 0, 0.05, 0.10, 0.15) thin films for deep and dilute blue LED applications

Chattopadhyay

Misra

et al. 2021

Luminescence

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The effect of copper (Cu) doping on the luminescent properties of the spray deposited Mg0.2Zn0.8S thin films were investigated for the first time. The Mg0.2Zn0.8S film is an excellent luminescent material with strong blue emissions. In the current investigation, we doped Mg0.2Zn0.8S with Cu by taking (Cu + Mg) as 20 at% by keeping other element ratios constant. Among the different samples in the series, Cu0.05Mg0.15Zn0.8S has shown promising results with dark blue emission. Also, these films showed good structural formation with lower or no other impurities, which is evident from the X‐ray diffraction (XRD). Scanning electron microscopy (SEM), energy‐dispersive X‐ray spectroscopy (EDX) and atomic force microscopy (AFM) confirmed the improved material quality of Cu0.05Mg0.15Zn0.8S as compared to the pristine. Raman and X‐ray photoelectron spectroscopy (XPS) studies have been carried out for the samples. Various defects induced in the films were investigated by recording the photoluminescence (PL) spectra and Cu:(Mg0.2Zn0.8S) films exhibited the capability to produce dilute blue luminescence by absorbing ultraviolet (UV) light. The Cu0.05Mg0.15Zn0.8S film showed promising material property, which is suitable for light‐emitting diode (LED) applications.

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“…[34] The structure of CdS possesses intensity optical properties due to their good interaction with light and provides significant advantage to semiconductor which is important for photoluminescence and other optical properties. [35][36][37] The element structure of RE elements is the same at their outer shell (5s 2 , 5p 6 , 6s 2 ) and differs only by electrons in the partially filled inner 4f shell.…”

Section: Applicationsmentioning

confidence: 99%

Structural Properties, Energy Interaction, and Applications of CdS Nanomaterial Doped with Rare‐Earth Ions

Singh,

Pal,

Nag

et al. 2024

Macromolecular Symposia

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Spectroscopic analysis of trivalent praseodymium (Pr+3) and neodymium (Nd+3) ions have received very much interest and reveals good fluorescence efficiency in visible and near IR (NIR) region. Cadmium sulfide (CdS) nanomaterial sample doped with Pr+3 and Nd+3 ions are synthesized at room temperature by simple chemical precipitation method. The synthesized sample has been characterized by powder X‐ray diffraction studies, scanning electron microscopy, transmission electron microscopy, and energy dispersive X‐ray spectra. Absorption spectra of CdS:Nd3+ and CdS:Pr3+ nanoparticles have been recorded at room temperature. Various parameters such as interplanar spacing, micro strain, dislocation density, distortion parameter, and particle size of nanomaterial are computed. TEM and XRD analysis reveal the spherical structure of the CdS:Nd3+ and CdS:Pr3+ nanoparticles in the prepared samples. Energy interaction parameters of the CdS:Nd3+ and CdS:Pr3+ nanoparticles are computed using UV‐visible absorption spectrum. Actually, CdS nanoparticle amplifies the luminescence intensity of Pr+3, Nd+3 ions by up conversion processes. So energy transfer can be observed from CdS nanoparticles doped with Pr+3, Nd+3 ions. Therefore, the use of pump sources and diode lasers in the UV range can be used to excite these samples to work as lasers. CdS:Nd3+ and CdS:Pr3+ nanoparticles find potential application as a window material for hetero‐junction solar cell, light emitting diodes (LED), biological sensors, address decoders, gas detectors, opto‐electronic devices, etc. CdS nanomaterials are also used as pigment in paints and in engineered plastic due to their good thermal stability.

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An in-depth investigation of physical properties of Nd doped CdS thin films for optoelectronic applications

Cited by 18 publications

References 60 publications

Morphological, Photoluminescence, and Electrical Measurements of Rare-Earth Metal-Doped Cadmium Sulfide Thin Films

Morphological, Photoluminescence, and Electrical Measurements of Rare-Earth Metal-Doped Cadmium Sulfide Thin Films

Spectroscopic investigation of Cu_xMg_0.2−xZn_0.8S (x = 0, 0.05, 0.10, 0.15) thin films for deep and dilute blue LED applications

Structural Properties, Energy Interaction, and Applications of CdS Nanomaterial Doped with Rare‐Earth Ions

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An in-depth investigation of physical properties of Nd doped CdS thin films for optoelectronic applications

Cited by 18 publications

References 60 publications

Morphological, Photoluminescence, and Electrical Measurements of Rare-Earth Metal-Doped Cadmium Sulfide Thin Films

Morphological, Photoluminescence, and Electrical Measurements of Rare-Earth Metal-Doped Cadmium Sulfide Thin Films

Spectroscopic investigation of CuxMg0.2−xZn0.8S (x = 0, 0.05, 0.10, 0.15) thin films for deep and dilute blue LED applications

Structural Properties, Energy Interaction, and Applications of CdS Nanomaterial Doped with Rare‐Earth Ions

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Spectroscopic investigation of Cu_xMg_0.2−xZn_0.8S (x = 0, 0.05, 0.10, 0.15) thin films for deep and dilute blue LED applications