scholarly journals Optical properties of praseodymium doped silver-borate glasses

2014 ◽  
Vol 92 (10) ◽  
pp. 1154-1157
Author(s):  
G.V. Jagadeesha Gowda ◽  
B. Eraiah
Keyword(s):  
Refractive Index ◽  
Band Gap ◽  
Energy Band ◽  
Molar Refraction ◽  
Optical Parameters ◽  
Borate Glasses ◽  
Energy Band Gap ◽  
Optical Energy ◽  
Optical Energy Band Gap ◽  
Oxide Ion

Praseodymium doped silver–borate glasses having composition xPr6O11–(25 – x)Ag2O–75B2O3 (x = 0, 1, 2, 3, 4, 5) were prepared by conventional melt quenching method. The density, molar volume, and optical energy band gap of these glasses were measured. Optical absorption spectra of these glasses were recorded in the range 300–1000 nm at room temperature. The refractive index, molar refraction, and polarizability of oxide ion were calculated by using Lorentz–Lorentz relations. The oxide ion polarizabilities deduced from two different quantities, viz. refractive index and optical energy band gap, agree well compared with other glasses. The variation of the preceding optical parameters with respect to praseodymium concentration is explained.

Investigation of optical energy band gap of transition metal oxide/polystyrene nanocomposite foils

2021 ◽  
Author(s):  
Monika Barala ◽  
Bulkesh Siwach ◽  
Reetu Sangwan ◽  
Kavita Yadav ◽  
Devendra Mohan ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Band Gap ◽  
Energy Band ◽  
Transition Metal Oxide ◽  
Energy Band Gap ◽  
Optical Energy ◽  
Optical Energy Band Gap

The Role of Samarium Ion in Optical Properties of Magnesium Tellurite Glass Embedded with Silver Nanoparticles

2015 ◽  
Vol 1107 ◽  
pp. 460-465
Author(s):  
M.Y. Nurulhuda ◽  
M.R. Sahar
Keyword(s):  
Band Gap ◽  
Energy Band ◽  
Tellurite Glass ◽  
Urbach Energy ◽  
Energy Band Gap ◽  
Optical Energy ◽  
Optical Energy Band Gap ◽  
Absorption Studies ◽  
Uv Visible

A series of tellurite glass based on composition (89.6-x)TeO2-10MgO-xSm2O3-0.4AgCl where 0.2x1.0 have successfully been prepared by melt-quenching technique. The optical behaviour has been examined as a function of Sm2O3 content by using UV-Visible Spectroscopy in the range of 200-900 nm. The absorption studies revealed that the indirect and direct optical energy band gap is in the range of 2.81-3.11 eV and 3.16-3.45 eV, respectively. Meanwhile, Urbach energy, E is in between 0.18-0.24 eV. The increasing in samarium ion up to 0.4 mol% of Sm2O3 result in an increment of optical energy band gap, but gradually decreases beyond 0.4 mol%. All the results will be discussed with respect to Sm2O3 content.

Spectroscopic Properties of Rare Earth Ion Doped TeO2-B2O3-PbO Glass

2014 ◽  
Vol 69 (6) ◽  
Author(s):  
A. Noranizah ◽  
K. Azman ◽  
H. Azhan ◽  
E. S. Nurbaisyatul ◽  
A. Mardhiah
Keyword(s):  
Refractive Index ◽  
Rare Earth ◽  
Glass Sample ◽  
Spectroscopic Properties ◽  
Molar Refraction ◽  
Energy Band Gap ◽  
Melt Quenching ◽  
Rare Earth Ion ◽  
Optical Energy Band Gap ◽  
Oxide Ion

This work focuses on the spectroscopic study of RE3+ ion, namely, trivalent neodymium (Nd3+) doped lead borotellurite glass with a composition of TeO2-B2O3-PbO. The glass sample has been prepared by conventional melt-quenching technique. The density, molar volume and optical energy band gap of these glasses have been measured. The refractive index, molar refraction and polarizability of oxide ion have been calculated by using Lorentz-Lorentz relations. The absorption spectra are recorded using UV-Vis-NIR spectrometer in the range of 200-900 nm.

Optical energy band gap of PAAm-GO composites

2018 ◽  
Vol 183 ◽  
pp. 212-215 ◽  
Author(s):  
Gülşen Akın Evingür ◽  
Önder Pekcan
Keyword(s):  
Band Gap ◽  
Energy Band ◽  
Energy Band Gap ◽  
Optical Energy ◽  
Optical Energy Band Gap

Temperature dependence of the optical energy band gap in CuIn3Se5 and CuGa3Se5

2003 ◽  
Vol 93 (1) ◽  
pp. 780-782 ◽  
Author(s):  
C. Rincón ◽  
S. M. Wasim ◽  
G. Marı́n ◽  
I. Molina
Keyword(s):  
Temperature Dependence ◽  
Band Gap ◽  
Energy Band ◽  
Energy Band Gap ◽  
Optical Energy ◽  
Optical Energy Band Gap

Optical Properties Of Tantalum Oxide Films Deposited On BK7 Substrates By Excimer Laser Ablation

2000 ◽  
Vol 617 ◽  
Author(s):  
S. Boughaba ◽  
M. U. Islam
Keyword(s):  
Optical Properties ◽  
Laser Ablation ◽  
Band Gap ◽  
Energy Band ◽  
Tantalum Oxide ◽  
Energy Band Gap ◽  
Optical Energy ◽  
Extinction Coefficients ◽  
Glass Substrates ◽  
Optical Energy Band Gap

AbstractThin amorphous films of tantalum oxide were grown on borosilicate crown glass substrates by KrF excimer pulsed laser ablation of a Ta2O5 target, in an oxygen environment. The deposition was performed at a temperature of 250 or 400 °C, while the oxygen pressure was set in the range 5 to 30 mTorr. The optical properties of the tantalum oxide coatings, as evaluated by reflectance/transmittance spectrophotometry, were found to be dependent on the oxygen gas pressure. At a pressure of 5 mTorr, absorbing films were obtained, with extinction coefficients above 10−2 (at λ=633 nm), along with an optical energy band-gap as low as 0.7 eV. At a pressure of 10 mTorr and above, the coatings had refractive indices up to 2.25 (at λ=633 nm), extinction coefficients below 10−4 (for λ>390 nm), and an optical energy band-gap in the range 3.9 to 4.0 eV.

scholarly journals Effect of Co3O4 doping and sintering temperature on optical energy band gap properties in Zn-Bi-Ti-O varistor ceramics

2017 ◽  
Author(s):  
Mohd Sabri Mohd Ghazali ◽  
Wan Rafizah Wan Abdullah ◽  
Azmi Zakaria ◽  
Muhamad Azman Zulkifli ◽  
Mohd Hafiz Mohd Zaid ◽  
...  
Keyword(s):  
Band Gap ◽  
Energy Band ◽  
Sintering Temperature ◽  
Energy Band Gap ◽  
Optical Energy ◽  
Optical Energy Band Gap

Investigation some Properties of Bismuth Borate Glasses Containing Al2O3

2016 ◽  
Vol 675-676 ◽  
pp. 347-350
Author(s):  
Sopanat Kongsriprapan ◽  
Kanyakorn Teanchai ◽  
Keerati Kirdsiri ◽  
Jakrapong Kaewkhao ◽  
Wichian Siriprom
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Band Gap ◽  
Energy Band ◽  
Glass Matrix ◽  
Borate Glass ◽  
Borate Glasses ◽  
Energy Band Gap ◽  
Bismuth Borate ◽  
Bismuth Borate Glass

The glass samples in bismuth borate glass matrix containing Al2O3, with the composition of xAl2O3 : 30Bi2O3 : (70-x)B2O3 where x are Al2O3 concentration varying from 0.0, 2.0, 4.0, 6.0, 8.0 and 10.0 mol%, have been prepared. The obtained glasses were investigated some physical and optical properties. The results showed that the densities increased with increasing of Al2O3 concentration, whereas the molar volumes decreased. For the absorption spectra, no peak in the UV to NIR regions has been observed. Moreover the energy band gap and the refractive index for all samples have been calculated.

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