Effect of aging time on the optical, structural and photoluminescence properties of nanocrystalline ZnO films prepared by a sol-gel method

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Abstract

The nanocrystalline zinc oxide (ZnO) films were deposited by a sol-gel method and the effect of sol aging time 0, 1, 7 and 11 days on the structural, optical and photoluminescence properties were investigated. X-ray diffraction analysis showed that the deposited films were polycrystalline with hexagonal wurtzite structure and high orientation along c-axis direction. The grain size was in the range of 42-60 nm increased with sol aging time also the thickness increased from 70 to 147 nm with the aging time increment. The roughness of ZnO film investigated by atomic force microscope showed that roughness of the films increased then decreased with the increment of the aging time. The deposited films are highly transparent with an average transmission exceeding 82-95% in the visible range (400-800 nm), which slightly improved with aging time. The measured optical band gap values of the ZnO films were between 3.1 eV and 3.6 eV. The photoluminescence intensity increased with the aging time and the ZnO films have ultraviolet, violet and green emission.

Original languageEnglish
Pages (from-to)599-602
Number of pages4
JournalApplied Surface Science
Volume283
DOIs
Publication statusPublished - 15 Oct 2013

Fingerprint

Zinc Oxide
Zinc oxide
Sol-gel process
Oxide films
Photoluminescence
Aging of materials
Polymethyl Methacrylate
Sols
Surface roughness
Optical band gaps
X ray diffraction analysis
Microscopes

Keywords

  • Photoluminescence
  • Sol-gel
  • Zinc oxide

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

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title = "Effect of aging time on the optical, structural and photoluminescence properties of nanocrystalline ZnO films prepared by a sol-gel method",
abstract = "The nanocrystalline zinc oxide (ZnO) films were deposited by a sol-gel method and the effect of sol aging time 0, 1, 7 and 11 days on the structural, optical and photoluminescence properties were investigated. X-ray diffraction analysis showed that the deposited films were polycrystalline with hexagonal wurtzite structure and high orientation along c-axis direction. The grain size was in the range of 42-60 nm increased with sol aging time also the thickness increased from 70 to 147 nm with the aging time increment. The roughness of ZnO film investigated by atomic force microscope showed that roughness of the films increased then decreased with the increment of the aging time. The deposited films are highly transparent with an average transmission exceeding 82-95{\%} in the visible range (400-800 nm), which slightly improved with aging time. The measured optical band gap values of the ZnO films were between 3.1 eV and 3.6 eV. The photoluminescence intensity increased with the aging time and the ZnO films have ultraviolet, violet and green emission.",
keywords = "Photoluminescence, Sol-gel, Zinc oxide",
author = "Ibrahim, {Noor Baa`Yah} and Al-Shomar, {S. M.} and Sahrim Ahmad",
year = "2013",
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language = "English",
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journal = "Applied Surface Science",
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TY - JOUR

T1 - Effect of aging time on the optical, structural and photoluminescence properties of nanocrystalline ZnO films prepared by a sol-gel method

AU - Ibrahim, Noor Baa`Yah

AU - Al-Shomar, S. M.

AU - Ahmad, Sahrim

PY - 2013/10/15

Y1 - 2013/10/15

N2 - The nanocrystalline zinc oxide (ZnO) films were deposited by a sol-gel method and the effect of sol aging time 0, 1, 7 and 11 days on the structural, optical and photoluminescence properties were investigated. X-ray diffraction analysis showed that the deposited films were polycrystalline with hexagonal wurtzite structure and high orientation along c-axis direction. The grain size was in the range of 42-60 nm increased with sol aging time also the thickness increased from 70 to 147 nm with the aging time increment. The roughness of ZnO film investigated by atomic force microscope showed that roughness of the films increased then decreased with the increment of the aging time. The deposited films are highly transparent with an average transmission exceeding 82-95% in the visible range (400-800 nm), which slightly improved with aging time. The measured optical band gap values of the ZnO films were between 3.1 eV and 3.6 eV. The photoluminescence intensity increased with the aging time and the ZnO films have ultraviolet, violet and green emission.

AB - The nanocrystalline zinc oxide (ZnO) films were deposited by a sol-gel method and the effect of sol aging time 0, 1, 7 and 11 days on the structural, optical and photoluminescence properties were investigated. X-ray diffraction analysis showed that the deposited films were polycrystalline with hexagonal wurtzite structure and high orientation along c-axis direction. The grain size was in the range of 42-60 nm increased with sol aging time also the thickness increased from 70 to 147 nm with the aging time increment. The roughness of ZnO film investigated by atomic force microscope showed that roughness of the films increased then decreased with the increment of the aging time. The deposited films are highly transparent with an average transmission exceeding 82-95% in the visible range (400-800 nm), which slightly improved with aging time. The measured optical band gap values of the ZnO films were between 3.1 eV and 3.6 eV. The photoluminescence intensity increased with the aging time and the ZnO films have ultraviolet, violet and green emission.

KW - Photoluminescence

KW - Sol-gel

KW - Zinc oxide

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