Physical and Optical Properties of Borobismuthate Glasses Containing Vanadium Oxide

Pothuganti, Pavan Kumar; Bhogi, Ashok; Kalimi, Muralidhara Reddy; Reniguntla, Padamasuvarna

doi:10.1134/s1087659620020078

Cited by 17 publications

(3 citation statements)

References 47 publications

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“…These changes may be interpreted as a weak perturbation introduced by the polymer matrix on the chelate effect of the tridentate ligands due to the steric effects [44,45]. According to Judd, large values of Ω 2 can be expected for systems with a triangle as the coordination polyhedron, but small values of Ω 2 are determinate for systems with a tricapped trigonal prism as a coordination polyhedron [46,47]. The Ω 2 values determined in this work are in good agreement with a tricapped trigonal prism coordination around the Eu 3+ ions suggested by Cai et al [28] and found in the continuous shape measures analysis above.…”

Section: Optical Properties Of the Eu( 3 Dpiqc) 3 Complex In Solution...mentioning

confidence: 99%

“…Judd-Ofelt theory serves as a valuable tool for the analysis of f-f inner shell electronic transitions. Within Judd-Ofelt theory, the dipole strengths are described by three phenomenological parameters: Ω λ (λ = 2, 4, 6) [44,46,59]. The experimental Ω λexp parameters were derived from the luminescence spectra by correlating the emission intensities to the integrated areas under the emission bands in the luminescence spectrum using LUMPAC.…”

Section: Computational Modellingmentioning

confidence: 99%

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Enhancing c-Si Solar Cell Efficiency in the UV Region: Photophysical Insights into the Use of Eu3+ Complexes for Down-Shifting Layer Applications

Vargas,

Nelson,

Espinoza

et al. 2023

Molecules

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[Eu(3DPIQC)3] (where DPIQC = 3-(diphenyl phosphoryl)-1-isoquinolinecarboxylate), a luminescent europium complex with antenna ligands, has been carefully embedded within a polyvinyl butyral (PVB) matrix and the resulting material was used to prepare films used as luminescent down-shifting layers (LDSLs) for crystalline Si-based solar cells. The films were characterized using photoluminescence spectroscopy, atomic force spectroscopy (AFM), UV-Vis spectroscopy, and fluorescence microscopy. The AFM analysis shows films with low surface roughness, while fluorescence microscopy revealed that the Eu complex embedded in PVB assumed a spheroidal configuration, a morphology especially beneficial for optical applications. The so-obtained LDSLs were utilized as energy converters in c-Si solar cells to enhance the utilization of high-energy photons, thereby improving their overall efficiency. The determination of photovoltaic parameters carried out before and after the deposition of the LDSLs on the c-Si cells confirms a positive effect on the efficiency of the cell. The Jsc increases from 121.6 mA/cm2 to 124.9 mA/cm2, and the open circuit voltage (Voc) is found to be unrelated to the complex concentration in the films. The fill factor (FF) remains constant with the Eu concentration. The EQE curves indicate an enhancement in the performance of the photovoltaic cells within the UV region of the spectrum for all coated devices. Electrochemical impedance spectroscopy (EIS) was also carried out in order to analyze the effect of the Eu complex in the charge transfer process of the devices.

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Section: Optical Properties Of the Eu( 3 Dpiqc) 3 Complex In Solution...mentioning

confidence: 99%

Section: Computational Modellingmentioning

confidence: 99%

Enhancing c-Si Solar Cell Efficiency in the UV Region: Photophysical Insights into the Use of Eu3+ Complexes for Down-Shifting Layer Applications

Vargas,

Nelson,

Espinoza

et al. 2023

Molecules

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“…Borobismuthate glasses doped with vanadium oxide glasses were investigated for physical, optical and structural properties in earlier studies and reported that they have good semiconducting behaviour (10) . The AC conductivity has not been studied.…”

Section: Introductionmentioning

confidence: 99%

Effect of Gamma Irradiation on Dielectric and AC Conductivity Studies of Bismuth Borate Glasses Doped with V2O5

Devidas¹,

Dinkar²,

Biradar³

2023

IJST

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Objectives: To study gamma ray irradiation effect on dielectric and AC conductivity of V 2 O 5 doped bismuth borate glasses designed with the compositions 50B 2 O 3 -(50-X)Bi 2 O 3 -XV 2 O 5 where, X = 0, 0.2, 0.4, 0.6, 0.8, 1.0 and establishing the conduction mechanism. Methods: Glasses were synthesized by traditional melt quenching technique at 1323K. The prepared samples were subjected to annealing at 623K, which helps to remove strain in the samples. Absence of crystalline phases in the samples was confirmed by X-ray diffraction studies. An independent measurement of dielectric constant, dielectric loss and AC conductivity was carried out for temperature range from 300Kto 493K by impedance analyzer. Findings: The physical properties of glass were achieved by studying the density and the molar volume. Dielectric constant (ε') and dielectric loss (ε") were measured as a function of temperatures in the range from 300K to 493K, over the frequencies 10 2 Hz -10 6 Hz before and after gamma ray irradiation. AC conductivity (σ AC ) of the glasses was measured as a function of frequency for different temperatures before and after gamma ray irradiation. Novelty: For the first time, it was attempted that the effect of gamma ray irradiation on dielectric and AC conductivity properties of bismuth-borate glasses doped with vanadium oxide has been investigated. Here we have observed the change in the variation of dielectric constant, dielectric loss and AC conductivity with frequency and temperature before and after gamma ray irradiation. The borate network becomes more compact after being exposed to gamma rays, and the energy band gap may even narrow. Furthermore, it has been found that the composition of the glass influences how radiation impacts conductivity.

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Shielding parameters and UV spectral studies on modified borate glasses doped with Gd2O3

Madshal,

Abdelghany,

Behairy

et al. 2023

Appl. Phys. A

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Physical and Optical Properties of Borobismuthate Glasses Containing Vanadium Oxide

Cited by 17 publications

References 47 publications

Enhancing c-Si Solar Cell Efficiency in the UV Region: Photophysical Insights into the Use of Eu3+ Complexes for Down-Shifting Layer Applications

Enhancing c-Si Solar Cell Efficiency in the UV Region: Photophysical Insights into the Use of Eu3+ Complexes for Down-Shifting Layer Applications

Effect of Gamma Irradiation on Dielectric and AC Conductivity Studies of Bismuth Borate Glasses Doped with V2O5

Shielding parameters and UV spectral studies on modified borate glasses doped with Gd2O3

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