Structural, morphological and optical properties of Eu3+ doped ZnO/Zn2SiO4 fabricated via thermal treatment method

The advancement in the electronic display and optical electronics’ technology has made the phosphor field one of the interesting fields to study among researchers. Hence, a lot of new synthesis techniques as well as different starting materials have been used for the fabrication of enhanced phosp...

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Main Author:	Jaafar, Suhail Huzaifa
Format:	Thesis
Language:	English
Published:	2021
Subjects:	Doped semiconductors Zinc - Thermal conductivity Zinc - Optical properties
Online Access:	http://psasir.upm.edu.my/id/eprint/104274/1/SUHAIL%20HUZAIFA%20BIN%20JAAFAR%20-%20IR.pdf
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spelling	my-upm-ir.1042742023-07-25T02:18:41Z Structural, morphological and optical properties of Eu3+ doped ZnO/Zn2SiO4 fabricated via thermal treatment method 2021-04 Jaafar, Suhail Huzaifa The advancement in the electronic display and optical electronics’ technology has made the phosphor field one of the interesting fields to study among researchers. Hence, a lot of new synthesis techniques as well as different starting materials have been used for the fabrication of enhanced phosphor. This research work uses the thermal treatment method to synthesis the Eu3+ doped ZnO/Zn2SiO4 based composites which undergo calcination process at a temperature between 600 °C, 700 °C, and 800 °C for 2 h, 3 h and 4 h holding times. Different parameters or variables have been studied in this work including the effect of calcination temperature, holding time and Eu3+ concentration on the structural, morphological and optical characteristics of ZnO/Zn2SiO4 based composites. The XRD analysis shows the existence of two major phases which are ZnO and Zn2SiO4 crystals, which are supported by the finding in the FTIR. The FESEM micrograph show that progress in the calcination temperature and holding time, affects to the existence of necking-like shape particle. Absorption humps discovered through UV-Vis spectroscopy reveal that samples at the higher calcination temperature, holding time and Eu3+ concentration possess higher absorption intensity. Two types of band gap can be seen from the energy band gap analysis which occurs from ZnO crystal and Zn2SiO4 crystal progress. It is also discovered that the Zn2SiO4 crystal (5.345 to 4.182 eV) has a higher band gap compared to the ZnO crystal (3.217 to 3.176 eV). While, for the photoluminescence study, the emission spectra show higher calcination holding time exhibit higher emission intensity with 700 °C being the optimum temperature. The emission spectra also show higher concentration of Eu3+ helps for enhancing the emission intensity until 5 mol% of Eu3+ dopant concentration. The study findings provide a new and simple method for the fabrication of Eu3+ doped ZnO/Zn2SiO4 based composites for new potential red phosphor application in the optoelectronic fields. Doped semiconductors Zinc - Thermal conductivity Zinc - Optical properties 2021-04 Thesis http://psasir.upm.edu.my/id/eprint/104274/ http://psasir.upm.edu.my/id/eprint/104274/1/SUHAIL%20HUZAIFA%20BIN%20JAAFAR%20-%20IR.pdf text en public masters Universiti Putra Malaysia Doped semiconductors Zinc - Thermal conductivity Zinc - Optical properties Mohd Zaid, Mohd Hafiz
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Mohd Zaid, Mohd Hafiz
topic	Doped semiconductors Zinc - Thermal conductivity Zinc - Optical properties
spellingShingle	Doped semiconductors Zinc - Thermal conductivity Zinc - Optical properties Jaafar, Suhail Huzaifa Structural, morphological and optical properties of Eu3+ doped ZnO/Zn2SiO4 fabricated via thermal treatment method
description	The advancement in the electronic display and optical electronics’ technology has made the phosphor field one of the interesting fields to study among researchers. Hence, a lot of new synthesis techniques as well as different starting materials have been used for the fabrication of enhanced phosphor. This research work uses the thermal treatment method to synthesis the Eu3+ doped ZnO/Zn2SiO4 based composites which undergo calcination process at a temperature between 600 °C, 700 °C, and 800 °C for 2 h, 3 h and 4 h holding times. Different parameters or variables have been studied in this work including the effect of calcination temperature, holding time and Eu3+ concentration on the structural, morphological and optical characteristics of ZnO/Zn2SiO4 based composites. The XRD analysis shows the existence of two major phases which are ZnO and Zn2SiO4 crystals, which are supported by the finding in the FTIR. The FESEM micrograph show that progress in the calcination temperature and holding time, affects to the existence of necking-like shape particle. Absorption humps discovered through UV-Vis spectroscopy reveal that samples at the higher calcination temperature, holding time and Eu3+ concentration possess higher absorption intensity. Two types of band gap can be seen from the energy band gap analysis which occurs from ZnO crystal and Zn2SiO4 crystal progress. It is also discovered that the Zn2SiO4 crystal (5.345 to 4.182 eV) has a higher band gap compared to the ZnO crystal (3.217 to 3.176 eV). While, for the photoluminescence study, the emission spectra show higher calcination holding time exhibit higher emission intensity with 700 °C being the optimum temperature. The emission spectra also show higher concentration of Eu3+ helps for enhancing the emission intensity until 5 mol% of Eu3+ dopant concentration. The study findings provide a new and simple method for the fabrication of Eu3+ doped ZnO/Zn2SiO4 based composites for new potential red phosphor application in the optoelectronic fields.
format	Thesis
qualification_level	Master's degree
author	Jaafar, Suhail Huzaifa
author_facet	Jaafar, Suhail Huzaifa
author_sort	Jaafar, Suhail Huzaifa
title	Structural, morphological and optical properties of Eu3+ doped ZnO/Zn2SiO4 fabricated via thermal treatment method
title_short	Structural, morphological and optical properties of Eu3+ doped ZnO/Zn2SiO4 fabricated via thermal treatment method
title_full	Structural, morphological and optical properties of Eu3+ doped ZnO/Zn2SiO4 fabricated via thermal treatment method
title_fullStr	Structural, morphological and optical properties of Eu3+ doped ZnO/Zn2SiO4 fabricated via thermal treatment method
title_full_unstemmed	Structural, morphological and optical properties of Eu3+ doped ZnO/Zn2SiO4 fabricated via thermal treatment method
title_sort	structural, morphological and optical properties of eu3+ doped zno/zn2sio4 fabricated via thermal treatment method
granting_institution	Universiti Putra Malaysia
publishDate	2021
url	http://psasir.upm.edu.my/id/eprint/104274/1/SUHAIL%20HUZAIFA%20BIN%20JAAFAR%20-%20IR.pdf
_version_	1776100426965319680

Structural, morphological and optical properties of Eu3+ doped ZnO/Zn2SiO4 fabricated via thermal treatment method

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