Role of Bi3+ ions on structural, optical, photoluminescence and electrical performance of Cd0.9-xZn0.1BixS QDs

Krishnamoorthy, Aravind; Sakthivel, P.; Devadoss, I.; Rajathi, V. M. Anitha

doi:10.1007/s42452-021-04681-7

Cited by 10 publications

(3 citation statements)

References 43 publications

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“…In this view, the glass with the highest concentration of CuO 12 mol% among all the other glasses was noted. Table 6 presents the results of current glasses together with identifications and evaluations of the absorption spectra (18) . As the amount of Bi 2 O 3 increases, the optical band gap parameter decreases, as shown by the Tauc plots and observed optical absorption spectra of the current glasses.…”

Section: Resultsmentioning

confidence: 99%

Characterization of a Novel System of Bismuth Lead Borosilicate Glass Containing Copper

Krishna,

Guntu,

Shareefuddin

et al. 2024

IJST

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Objectives: The primary objective of the present investigation was to examine the impact of Bi3+ ions on the optical, radiation shielding, dielectric and structural characteristics of lead borosilicate glasses doped with CuO. Method: In this view, we planned to utilize the conventional rapid melt quenching method to produce glasses with the following chemical composition: 25 PbO + 15 B2O3 + 0.1 CuO + (59.9-x) SiO2 :x Bi2O3 (0≤x≤12). Findings: The samples' non-crystalline characteristics were validated through XRD and SEM analysis, respectively, while their glass-forming capabilities were assessed through DTA studies. Utilizing the FT–IR and Raman analyses, the numerous structural units were determined. According to the findings of the FT-IR, and Raman analyses, the degree of disorder in the glass network increased. By means of optical absorption experiments, the optical properties of glasses were determined. The results obtained from optical absorption spectral investigations indicated that the concentration of octahedral Cu2+ ions increased gradually as the Bi2O3 concentration increased to 12 mol %. The dielectric properties of the glasses, suggested that the dielectric constant values of glasses containing Bi2O3 in concentrations below 12 mol% increase gradually. Additionally, the radiation shielding properties of the glasses are investigated. The values of radiation protection ability found to be purely function of Bi2O3 concentration. Novelty: The results suggest that the glasses' thermal stability, dielectric constant, optical band gap and radiation shielding ability values purely function of Bi2O3 concentration. Keywords: Borosilicate glasses, Thermal stability, Optical absorption, Radiation shielding properties, Dielectricsq

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Section: Resultsmentioning

confidence: 99%

Characterization of a Novel System of Bismuth Lead Borosilicate Glass Containing Copper

Krishna,

Guntu,

Shareefuddin

et al. 2024

IJST

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“…Sakthivel et al [36] reported the addition of Ni 2+ into Cd-Zn-S enhanced the optical transmittance nature in visible wavelengths and the energy gap was blue-shifted at Ni = 6 at%. Visible light driven photo-catalytic hydrogen generation with the apparent quantum efficiency around 80% was demonstrated by Khan et al [37] on Cd 0.9 Zn 0.1 S. The energy gap of Bi doped Cd 0.9 Zn 0.1 S QD was varied between 3.76 and 4.0 eV [38]. Moreover, the maximum PL red intensity was noticed at Bi = 1% doped Cd 0.9 Zn 0.1 S. The elevated blue light emission and also the red shifted red emission have been noticed on PL examination of Cr, Zn co-doped CdS [39].…”

Section: Introductionmentioning

confidence: 98%

Enhanced Photo-Catalytic and Antibacterial Properties of Ni-Doped Cd0.9Zn0.1S Nanostructures

Jothi¹,

Ganesh

Muthukumaran³

et al. 2021

J Inorg Organomet Polym

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The present work describe the synthesis of Cd 0.9 Zn 0.1 S and Cd 0.87 Zn 0.1 Ni 0.03 S nanostructures by chemical co-precipitation method. The XRD profile proved the cubic crystal structure of the samples without any impurity related phases. The reduced size from 63 to 51 Å and the dissimilarities in lattice parameters and micro-strain has been discussed by Ni addition in Cd 0.87 Zn 0.1 Ni 0.03 S structure. The noticed anomalous optical studies and the elevated transmittance at Ni doped sample suggested them for the fabrication of efficient opto-electronic devices. The energy gap reduction during the substitution of Ni = 3% is explained by the generation of extra energy levels associated with defects within the two bands. The release of additional charge carriers, improved optical property, reduced particle size and more defect generation are responsible for the enhanced photo-catalytic performance of Ni doped Cd 0.9 Zn 0.1 S. The enhanced anti-bacterial capacity in Cd 0.87 Zn 0.1 Ni 0.03 S is described by the collective response of reduced particle size and higher reactive oxygen species (ROS) like O 2 ⋅− , H 2 O 2 and OH ⋅ generating capacity.

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“…The photoluminescence properties of QDs can be tuned accurately with sharp emission depending on their composition and size [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. Furthermore, single QDs have a high surface-to-volume ratio catering to a significant number of surface trap states, which then act as de-excitation (non-radiative) centers for photo-generated charge carriers.…”

Section: Introductionmentioning

confidence: 99%

Optical Dynamics of Copper-Doped Cadmium Sulfide (CdS) and Zinc Sulfide (ZnS) Quantum-Dots Core/Shell Nanocrystals

et al. 2022

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Recently, quantum-dot-based core/shell structures have gained significance due to their optical, optoelectronic, and magnetic attributes. Controlling the fluorescence lifetime of QDs shells is imperative for various applications, including light-emitting diodes and single-photon sources. In this work, novel Cu-doped CdS/ZnS shell structures were developed to enhance the photoluminescence properties. The objective was to materialize the Cu-doped CdS/ZnS shells by the adaptation of a two-stage high-temperature doping technique. The developed nanostructures were examined with relevant characterization techniques such as transmission electron microscopy (TEM) and ultraviolet–visible (UV–vis) emission/absorption spectroscopy. Studying fluorescence, we witnessed a sharp emission peak at a wavelength of 440 nm and another emission peak at a wavelength of 620 nm, related to the fabricated Cu-doped CdS/ZnS core/shell QDs. Our experimental results revealed that Cu-doped ZnS shells adopted the crystal structure of CdS due to its larger bandgap. Consequently, this minimized lattice mismatch and offered better passivation to any surface defects, resulting in increased photoluminescence. Our developed core/shells are highly appropriate for the development of efficient light-emitting diodes.

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Role of Bi3+ ions on structural, optical, photoluminescence and electrical performance of Cd0.9-xZn0.1BixS QDs

Cited by 10 publications

References 43 publications

Characterization of a Novel System of Bismuth Lead Borosilicate Glass Containing Copper

Characterization of a Novel System of Bismuth Lead Borosilicate Glass Containing Copper

Enhanced Photo-Catalytic and Antibacterial Properties of Ni-Doped Cd0.9Zn0.1S Nanostructures

Optical Dynamics of Copper-Doped Cadmium Sulfide (CdS) and Zinc Sulfide (ZnS) Quantum-Dots Core/Shell Nanocrystals

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