Effect of Composition on Optical Properties of Bismuth Borate Glasses Doped with Europium Ions
Session Number
PHYS 12
Advisor(s)
Dr. P.K. Babu, Western Illinois University, Nanomaterials Research Lab
Dr. Saisudha Mallur, Western Illinois University, Nanomaterials Research Lab
Discipline
Physical Science
Start Date
17-4-2024 11:05 AM
End Date
17-4-2024 11:20 AM
Abstract
We studied the optical properties of Eu-doped bismuth borate glass samples. A series of bismuth borate glass samples were prepared with variations in mole percentages per compound. These molar ratios were as follows: xBi2O3: (99-x)B2O3 : 1Eu2O3 where x = 30, 40, 50, 60 mol %. These mixtures were then melted, quenched, annealed, and polished to create four transparent glass samples. The density by Archimedes’ method and the refractive index by
Brewster’s Angle method were measured. The fluorescence spectra of rare earth ions and the optical absorption spectra were also recorded. Our results indicated a positive correlation between variation in density and refractive index with bismuth oxide concentration. The position of the intense Eu fluorescence peak reached a maximum around 40 mol %, indicating variation in Eu-O covalency. The area ratio indicates that the intensity of the intense peak decreases with bismuth oxide concentration. Optical band gap decreases with an increase in Bi2O3 concentration due to structural changes.
Effect of Composition on Optical Properties of Bismuth Borate Glasses Doped with Europium Ions
We studied the optical properties of Eu-doped bismuth borate glass samples. A series of bismuth borate glass samples were prepared with variations in mole percentages per compound. These molar ratios were as follows: xBi2O3: (99-x)B2O3 : 1Eu2O3 where x = 30, 40, 50, 60 mol %. These mixtures were then melted, quenched, annealed, and polished to create four transparent glass samples. The density by Archimedes’ method and the refractive index by
Brewster’s Angle method were measured. The fluorescence spectra of rare earth ions and the optical absorption spectra were also recorded. Our results indicated a positive correlation between variation in density and refractive index with bismuth oxide concentration. The position of the intense Eu fluorescence peak reached a maximum around 40 mol %, indicating variation in Eu-O covalency. The area ratio indicates that the intensity of the intense peak decreases with bismuth oxide concentration. Optical band gap decreases with an increase in Bi2O3 concentration due to structural changes.