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-ep.787292018-08-30T08:06:44Z Physical and spectroscopic properties of lithium-borosulfophosphate glasses doped with dysprosium and europium ions 2016-11 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 http://eprints.utm.my/id/eprint/78729/ http://eprints.utm.my/id/eprint/78729/1/IbrahimBulusMFS2016.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:105819 masters Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
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
qualification_level	Master's degree
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
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2016
url	http://eprints.utm.my/id/eprint/78729/1/IbrahimBulusMFS2016.pdf
_version_	1747818056979054592

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

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