Concentration effects on the optical spectroscopic properties of Er3+- doped TeO2–Nb2O5–ZnO vitreous system

Maaoui, A.; Haouari, Mohamed; Zaâboub, Z.; Fraj, Ibtissem; Saidi, F.; Ouada, H. Ben

doi:10.1016/j.jallcom.2015.12.130

Cited by 40 publications

(6 citation statements)

References 51 publications

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“…given by the Urbach energy, ΔE [8] [34]. According to Noorazlan et al [35], temperature, static disorder, mediated disorder, heavy ionic bonds, as well as average phonon energies in uence Urbach force.…”

Section: √ ( )mentioning

confidence: 99%

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Dielectric Constant, Metallization Criterion and Optical Properties of CuO Doped TeO2–B2O3 Glasses

Nazrin

Umar

Halimah

et al. 2022

J Inorg Organomet Polym

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Copper oxide doped TeO 2 -B 2 O 3 glass system with empirical formula; [(B 2 O 3 ) 0.3 (TeO 2 ) 0.7 ] 1-x (CuO) x using the melt quenching method, where x = 0.0, 0.01, 0.015, 0.02, and 0.025 was combined. The glass samples' density and molar volume were measured, followed by characterizations using the UV-Vis, Fourier transform infrared (FTIR) and X-ray diffraction (XRD) spectroscopes. The amorphous or glassy nature of glass samples was proven by the XRD spectra except for the pure borotellurite sample which showed a peak around 2θ = 20 o , indicating α-TeO 2 crystalline phase presence. The FTIR spectral analysis suggested the presence of BO 3 , TeO 3 and TeO 4 as the structural functional units in the glass samples.The UV-Vis spectra showed no presence of any sharply de ned edges, a rming the amorphous or glassy nature of the glass materials. Physical parameters e.g. molar volume, density, oxygen packing density (OPD), inter ionic distance of Cu 2+ ions, concentration of copper ion per unit volume (N), as well as the polaron radius data were presented and discussed. Also, the direct bandgap (3.8900 to 3.5900 eV) , indirect bandgap (3.3200 to 3.0800 eV), refractive index (2.318 to 2.378), dielectric constant (5.3731 to 5.6549), optical dielectric constant (4.3731 to 4.6549), refractive index based metallization criterion (0.406885 to 0.391916) and the band gap based metallization criterion (0.407431 to 0.392428) were analysed and discussed. Based on the metallization criterion and values of refractive index, the glasses are good candidates for optoelectronic and laser applications. Meanwhile, the dielectric constants' values of the present glasses indicate their suitability bandpass lters and microelectronic substrates applications.

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Section: √ ( )mentioning

confidence: 99%

“…where ℏ is the plank constant, β is a constant, and ΔE is the Urbach energy which speci es the width of the band tails of the localized state [34]. As shown in Figure 8, by taking the reciprocals of the slopes of the portion in the lower photon energy curves, the values of Urbach energy are calculated [37].…”

Section: √ ( )mentioning

confidence: 99%

Dielectric Constant, Metallization Criterion and Optical Properties of CuO Doped TeO2–B2O3 Glasses

Nazrin

Umar

Halimah

et al. 2022

J Inorg Organomet Polym

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“…||U (λ) || representing the doublereduced square matrix elements of the unit tensor operator of rank λ = 2, 4 and 6 was calculated using the intermediate coupling approximation method for the transition from the lowest state to the highest state. The reduced matrix elements Ω λ |< aJ|U (λ) |bJ >| 2 were calculated following the work of Carnall et al [27].…”

Section: Judd-ofelt Analysismentioning

confidence: 99%

Effects of Vanadium on the Structural and Optical Properties of Borate Glasses Containing Er3+ and Silver Nanoparticles

Zaini

Mohamed

2021

Materials

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The erbium-vanadium co-doped borate glasses, embedded with silver nanoparticles (Ag NPs), were prepared to improve their optical properties for potential optical fiber and glass laser application. The borate glasses with composition (59.5–x) B2O3–20Na2O–20CaO–xV2O5–Er2O3–0.5AgCl (x = 0–2.5 mol%) were successfully prepared by conventional melt-quenching method. The structural properties of glass samples were investigated by XRD, TEM and by Fourier transform infrared (FTIR) spectroscopy while optical properties were carried out by UV–Vis spectroscopy by measuring optical absorption and the emission properties were investigated by photoluminescence spectroscopy. The XRD patterns confirmed the amorphous nature of the prepared glass samples whilst the FTIR confirmed the presence of VO4, VO5, BO3 and BO4 vibrations. UV–Vis–NIR absorption spectra reveal eight bands which were located at 450, 490, 519, 540, 660, 780, 980, and 1550 nm corresponding to transition of 4F5/2, 4F7/2, 2H11/2, 4S3/2, 4F9/2, 4I9/2, 4I11/2, and 4I13/2, respectively. The optical band gap (Eopt), Urbach energy and refractive index were observed to decrease, increase and increase, respectively, to the addition of vanadium. Under 800 nm excitation, three emission bands were observed at 516, 580 and 673 nm, which are represented by 2H11/2–4I15/2, 4S3/2–4I15/2 and 4F15/2–4I15/2, respectively. The excellent features of achieved results suggest that our findings may provide useful information toward the development of functional glasses.

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Section: √ ( )mentioning

confidence: 99%

Dielectric Constant, Metallization Criterion and Optical Properties of CuO Doped TeO2-B2O3 Glasses

Nidzam

Umar

Halimah

et al. 2021

Preprint

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Copper oxide doped TeO2 – B2O3 glass system with empirical formula; [(B2O3)0.3(TeO2)0.7]1-x(CuO)x using the melt quenching method, where x = 0.0, 0.01, 0.015, 0.02, and 0.025 was combined. The glass samples’ density and molar volume were measured, followed by characterizations using the UV-Vis, Fourier transform infrared (FTIR) and X-ray diffraction (XRD) spectroscopes. The amorphous or glassy nature of glass samples was proven by the XRD spectra except for the pure borotellurite sample which showed a peak around 2θ = 20o, indicating α-TeO2 crystalline phase presence. The FTIR spectral analysis suggested the presence of BO3, TeO3 and TeO4 as the structural functional units in the glass samples. The UV-Vis spectra showed no presence of any sharply defined edges, affirming the amorphous or glassy nature of the glass materials. Physical parameters e.g. molar volume, density, oxygen packing density (OPD), inter ionic distance of Cu2+ ions, concentration of copper ion per unit volume (N), as well as the polaron radius data were presented and discussed. Also, the direct bandgap (3.8900 to 3.5900 eV) , indirect bandgap (3.3200 to 3.0800 eV), refractive index (2.318 to 2.378), dielectric constant (5.3731 to 5.6549), optical dielectric constant (4.3731 to 4.6549), refractive index based metallization criterion (0.406885 to 0.391916) and the band gap based metallization criterion (0.407431 to 0.392428) were analysed and discussed. Based on the metallization criterion and values of refractive index, the glasses are good candidates for optoelectronic and laser applications. Meanwhile, the dielectric constants’ values of the present glasses indicate their suitability bandpass filters and microelectronic substrates applications.

show abstract

Concentration effects on the optical spectroscopic properties of Er3+- doped TeO2–Nb2O5–ZnO vitreous system

Cited by 40 publications

References 51 publications

Dielectric Constant, Metallization Criterion and Optical Properties of CuO Doped TeO2–B2O3 Glasses

Dielectric Constant, Metallization Criterion and Optical Properties of CuO Doped TeO2–B2O3 Glasses

Effects of Vanadium on the Structural and Optical Properties of Borate Glasses Containing Er3+ and Silver Nanoparticles

Dielectric Constant, Metallization Criterion and Optical Properties of CuO Doped TeO2-B2O3 Glasses

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