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Physical and spectroscopic properties of lithium-borosulfophosphate glasses doped with dysprosium and europium ions

A study had successfully been conducted on lithium-borosulfophosphate glasses to examine the effect of dysprosium and europium ions upon their physical and spectroscopic properties. The glass samples were synthesized via convectional melt quenching technique and characterized using density, X-Ray Di...

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Main Author: Bulus, Ibrahim
Format: Thesis
Language:English
Published: 2016
Subjects:
QC Physics
Online Access:http://eprints.utm.my/id/eprint/78729/1/IbrahimBulusMFS2016.pdf
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spelling my.utm.787292018-08-30T08:06:44Z http://eprints.utm.my/id/eprint/78729/ Physical and spectroscopic properties of lithium-borosulfophosphate glasses doped with dysprosium and europium ions Bulus, Ibrahim QC Physics A study had successfully been conducted on lithium-borosulfophosphate glasses to examine the effect of dysprosium and europium ions upon their physical and spectroscopic properties. The glass samples were synthesized via convectional melt quenching technique and characterized using density, X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), UV-Vis-NIR, and Photoluminescence (PL) measurements. The amorphous nature of the glass was confirmed using XRD studies. It is observed that the physical and optical properties of these glasses are found to be strongly influence by varying the glass composition. The glass density and refractive index increase proportionally with Dy2O3 and Eu2O3 concentration whereas the molar volume exhibits opposite behaviour. The result from FTIR spectra analysis indicates the presence of BO3, BO4, PO4 and SO42- groups in the host network structure. UV-Vis-NIR spectra of Dy3+ doped glass samples recorded seven absorption peaks while on the contrary, Eu3+ doped glass samples exhibits four peaks in UV-Visible region and two peaks in NIR region. The optical band gap was found to decrease gradually with increase in Dy3+ and Eu3+ concentration while the Ubach‘s energy shows inverse trend. Meanwhile the negative and positive value of the bonding parameters confirmed the corresponding ionic and covalent nature of Dy-O and Eu-O ligand bond in the host matrix. The luminescence spectra for Dy3+ doped samples at the excitation wavelength of 386 nm revealed two intense emission peaks at 494 nm (4F9/2?6H15/2), 585 nm (4F9/2?6H13/2) and a very weak peak at 673 nm (4F9/2?6H13/2). Conversely, doping the samples with Eu3+ ions gives rise to four emission peaks at 587 nm (5D0?7F1), 612 nm (5D0?7F2), 650 nm (5D0?7F2) and 698 nm (5D0?7F4) under the excitation wavelength of 394 nm. The superior features shown by the current glass material as a result of good correlations between the host network and dopant ions specifies its potentialities for lighting device applications. 2016-11 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/78729/1/IbrahimBulusMFS2016.pdf Bulus, Ibrahim (2016) Physical and spectroscopic properties of lithium-borosulfophosphate glasses doped with dysprosium and europium ions. Masters thesis, Universiti Teknologi Malaysia, Faculty of Science. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:105819
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic QC Physics
spellingShingle QC Physics
Bulus, Ibrahim
Physical and spectroscopic properties of lithium-borosulfophosphate glasses doped with dysprosium and europium ions
description A study had successfully been conducted on lithium-borosulfophosphate glasses to examine the effect of dysprosium and europium ions upon their physical and spectroscopic properties. The glass samples were synthesized via convectional melt quenching technique and characterized using density, X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), UV-Vis-NIR, and Photoluminescence (PL) measurements. The amorphous nature of the glass was confirmed using XRD studies. It is observed that the physical and optical properties of these glasses are found to be strongly influence by varying the glass composition. The glass density and refractive index increase proportionally with Dy2O3 and Eu2O3 concentration whereas the molar volume exhibits opposite behaviour. The result from FTIR spectra analysis indicates the presence of BO3, BO4, PO4 and SO42- groups in the host network structure. UV-Vis-NIR spectra of Dy3+ doped glass samples recorded seven absorption peaks while on the contrary, Eu3+ doped glass samples exhibits four peaks in UV-Visible region and two peaks in NIR region. The optical band gap was found to decrease gradually with increase in Dy3+ and Eu3+ concentration while the Ubach‘s energy shows inverse trend. Meanwhile the negative and positive value of the bonding parameters confirmed the corresponding ionic and covalent nature of Dy-O and Eu-O ligand bond in the host matrix. The luminescence spectra for Dy3+ doped samples at the excitation wavelength of 386 nm revealed two intense emission peaks at 494 nm (4F9/2?6H15/2), 585 nm (4F9/2?6H13/2) and a very weak peak at 673 nm (4F9/2?6H13/2). Conversely, doping the samples with Eu3+ ions gives rise to four emission peaks at 587 nm (5D0?7F1), 612 nm (5D0?7F2), 650 nm (5D0?7F2) and 698 nm (5D0?7F4) under the excitation wavelength of 394 nm. The superior features shown by the current glass material as a result of good correlations between the host network and dopant ions specifies its potentialities for lighting device applications.
format Thesis
author Bulus, Ibrahim
author_facet Bulus, Ibrahim
author_sort Bulus, Ibrahim
title Physical and spectroscopic properties of lithium-borosulfophosphate glasses doped with dysprosium and europium ions
title_short Physical and spectroscopic properties of lithium-borosulfophosphate glasses doped with dysprosium and europium ions
title_full Physical and spectroscopic properties of lithium-borosulfophosphate glasses doped with dysprosium and europium ions
title_fullStr Physical and spectroscopic properties of lithium-borosulfophosphate glasses doped with dysprosium and europium ions
title_full_unstemmed Physical and spectroscopic properties of lithium-borosulfophosphate glasses doped with dysprosium and europium ions
title_sort physical and spectroscopic properties of lithium-borosulfophosphate glasses doped with dysprosium and europium ions
publishDate 2016
url http://eprints.utm.my/id/eprint/78729/1/IbrahimBulusMFS2016.pdf
http://eprints.utm.my/id/eprint/78729/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:105819
_version_ 1643657986857500672
score 13.211869

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