Optical properties of alkaline earth borate glasses

Rao, Sls; Ramadevudu, G.; Shareefuddin, Md.; Hameed, Abdul; Chary, M. Narsimha; Rao, M.V. Sambasiva

doi:10.4314/ijest.v4i4.3

Cited by 81 publications

(19 citation statements)

References 24 publications

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“…The decrease in the optical band gap with precursor concentration may be attributed to the increase in grain size and decrease in structural disorder in the films as observed from Urbach energy analysis. In general it was shown that the band gap of all samples is inverted to Urbach energy [70] and the grain size is in respect to equation…”

Section: Opticalmentioning

confidence: 99%

Effect of Precursor Concentration on Structural Optical and Electrical Properties of NiO Thin Films Prepared by Spray Pyrolysis

Barir

Benhaoua²,

Benhamida

et al. 2017

Journal of Nanomaterials

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Undoped nickel oxide (NiO) thin films were deposited on 500 ∘ C heated glass substrates using spray pyrolysis method at (0.015-0.1 M) range of precursor. The latter was obtained by decomposition of nickel nitrate hexahydrate in double distilled water. Effect of precursor concentration on structural, optical, and electrical properties of NiO thin films was investigated. X-ray diffraction (XRD) shows the formation of NiO under cubic structure with single diffraction peak along (111) plane at 2 = 37.24 ∘ . When precursor concentration reaches 0.1 M, an increment in NiO crystallite size over 37.04 nm was obtained indicating the product nano structure. SEM images reveal that beyond 0.04 M as precursor concentration the substrate becomes completely covered with NiO and thin films exhibit formation of nano agglomerations at the top of the sample surface. Ni-O bonds vibrations modes in the product of films were confirmed by FT-IR analysis. Transparency of the films ranged from 57 to 88% and band gap energy of the films decreases from 3.68 to 3.60 eV with increasing precursor concentration. Electrical properties of the elaborated NiO thin films were correlated to the precursor concentration.

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Section: Opticalmentioning

confidence: 99%

Effect of Precursor Concentration on Structural Optical and Electrical Properties of NiO Thin Films Prepared by Spray Pyrolysis

Barir

Benhaoua²,

Benhamida

et al. 2017

Journal of Nanomaterials

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“…Reflection loss (R L ), dielectric constant (ɛ) of all the glass samples are evaluated from the corresponding refractive index values using the following relations, Metallic or non-metallic nature of any material can be identified by calculating the metallization criterion [59] given by, If R m > V m , the materials are said to be metallic and they are insulators if R m < V m . Here, we can see that all the prepared glass samples show insulating nature.…”

Section: Molar Polarizability Refractive Index and Molar Refractionmentioning

confidence: 99%

Influence of Er3+ ions on the physical, structural, optical, and thermal properties of ZnO–Li2O–P2O5 glasses

Shwetha

Eraiah

2019

Appl. Phys. A

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Er 3+ doped zinc lithium phosphate glass samples were synthesized by the very simple melt quenching method. The obtained X-ray diffraction patterns specify that the prepared glass samples exhibit glassy nature. The physical properties like packing density, molar volume, density, oxygen packing density, interionic distance, field strength, rare earth ion concentration, and polaron radius were calculated using appropriate formulae. DTA curve was analysed to evaluate the crystallization temperature, melting temperature, and glass transition temperature and hence study the thermal properties. Fourier transform infrared spectrum was recorded to examine the functional groups in the glass and study the structural characteristics of the glass. It showed the presence of symmetrical and asymmetrical stretching vibration modes of P-O-P linkages, bending modes of P-O in PO 4 , bending and stretching vibrations of OH groups and P-O-H water absorbance in the glasses. The absorption spectra of the prepared glasses in the UV-visible region (wavelength 200-1100 nm) were taken to study the optical properties of the glasses. The urbach energy and optical energy bandgap values are determined using Davis-Mott method. The refractive index of all the prepared glass samples is also measured and these values are used to determine the corresponding molar refraction, the molecular polarizability of oxide ions, dielectric constant, reflection loss, metallization criterion, electronic polarizability of the oxide ions, interaction parameter, electronegativity, optical basicity, and electric susceptibility of all the glass samples using appropriate formulae.

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“…where is a constant, ℏ is photon energy, and ( ) is the absorption coefficient. Urbach energy (Δ ) values are determined from the slopes of linear regions of the plots ln versus ℏ [43]. Calculated and acquired Δ values are revealed in Figure 7.…”

Section: Urbach Energymentioning

confidence: 99%

Linear Optical Properties of Zinc Borotellurite Glass Doped with Lanthanum Oxide Nanoparticles for Optoelectronic and Photonic Application

Fudzi

Kamari

Latif

et al. 2017

Journal of Nanomaterials

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Enhancing the optical properties of glasses for the sake of optical application in various fields is an ongoing challenge in materials science and technology. Thus, the optical properties of zinc borotellurite glass doped with lanthanum oxide nanoparticles (La2O3 NPs) with the chemical composition of {[(TeO2)0.7(B2O3)0.3]0.7(ZnO)0.3}1−x (La2O3 NPs)x, where x = 0.01, 0.02, 0.03, 0.04, and 0.05 molar fraction, have been investigated. Characterization techniques such as x-ray diffraction, Fourier Transform Infrared Spectroscopy, and Ultraviolet-Visible Spectroscopy are employed to yield the structural properties and optical parameter of the glass. The amorphous nature of the fabricated glasses is confirmed with the presence of a broad hump via XRD diffraction pattern. The decreasing amount of high polarizable nonbridging oxygen as the concentration of La2O3 NPs increases has contributed to the increasing trend of energy band gap in the range of 2.70 to 3.52 eV and decreasing value of refractive index between 2.34 and 2.48. The fabricated glasses that have a higher refractive index than the widely used fiber material, pure silica glass, indicate that zinc borotellurite glass doped with lanthanum nanoparticles is a promising material to be applied as optical fibers.

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Optical properties of alkaline earth borate glasses

Cited by 81 publications

References 24 publications

Effect of Precursor Concentration on Structural Optical and Electrical Properties of NiO Thin Films Prepared by Spray Pyrolysis

Effect of Precursor Concentration on Structural Optical and Electrical Properties of NiO Thin Films Prepared by Spray Pyrolysis

Influence of Er3+ ions on the physical, structural, optical, and thermal properties of ZnO–Li2O–P2O5 glasses

Linear Optical Properties of Zinc Borotellurite Glass Doped with Lanthanum Oxide Nanoparticles for Optoelectronic and Photonic Application

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