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Effect of some sol-gel synthesis parameters on the luminescence properties of zinc (ZnO) nanopowder doped with trivalent europium (Eu3+) / Ahmed Abd Erraouf Laidoudi
Titre : Effect of some sol-gel synthesis parameters on the luminescence properties of zinc (ZnO) nanopowder doped with trivalent europium (Eu3+) Type de document : texte imprimé Auteurs : Ahmed Abd Erraouf Laidoudi ; Lakhdar Guerbous, Directeur de thèse Editeur : Setif:UFA Année de publication : 2021 Importance : 1 vol. (53 f.) Format : 29 cm Langues : Anglais (eng) Catégories : Thèses & Mémoires:Physique Mots-clés : Oxyde de zinc
Sol gel
ZnOIndex. décimale : 530 Physique Note de contenu : Sommaire
forward.
Introduction : .................................................................................................................................7
I CHAPTER I: Zinc Oxide ......................................................................................................................8
I.1 Transparent Conducting Oxides (TCO): ................................................................................9
I.1.1 Transparent Conducting Oxides Properties: .................................................................................. 9
I.2 Zinc Oxide (ZnO): .................................................................................................................9
I.2.1 Structural Proprieties ................................................................................................................. 10
I.2.2 ZnO Proprieties .......................................................................................................................... 11
I.2.2.1 Electronic Properties: ........................................................................................................ 11
I.2.2.2 Piezoelectric Properties: .................................................................................................... 12
I.2.2.3 Optical Properties: ............................................................................................................. 12
I.2.3 Some Applications of Zinc Oxide: ................................................................................................ 13
I.2.3.1 Photodetector: .................................................................................................................. 13
I.2.3.2 Gas Sensors: ...................................................................................................................... 13
I.2.3.3 Biosensors: ........................................................................................................................ 14
I.2.3.4 Laser: ............................................................................................................................... 14
I.2.3.5 Schottky Diodes: ................................................................................................................ 14
I.2.3.6 Nuclear and medical applications: ...................................................................................... 14
I.3 Rare-Earth Elements: ......................................................................................................... 15
I.3.1 Europium Ion (Eu): ..................................................................................................................... 16
II CHAPTER II: Synthesis methods of ZnO Nanoparticles .................................................................. 18
II.1 Nanopowder Definition: .................................................................................................... 19
II.2 Nanoparticles Synthesis Techniques: ................................................................................. 19
II.3 Lithium (Li+) Effect to ZnO: ................................................................................................ 20
II.4 Sol-Gel Route..................................................................................................................... 20
II.4.1 Definition: ................................................................................................................................. 20
II.4.2 Preparation of the nanopowders precursors: ............................................................................. 21
II.4.3 Reaction mechanisms: ............................................................................................................... 22
II.4.3.3 Parameters That Can Influence the Reaction: ..................................................................... 23
II.4.3.4 Annealing: ......................................................................................................................... 24
II.4.4 Doping A Material: ..................................................................................................................... 24
II.5 XDR Technique: ................................................................................................................. 25
II.5.1 Principal of XRD: ........................................................................................................................ 26
II.6 Fourier Transform Infrared Spectroscopy (FTIR): ................................................................ 26
II.6.1 FTIR Principle: ............................................................................................................................ 27
II.7 Scanning Electron Microscopy: .......................................................................................... 28
II.7.1 Scanning Electron Microscopy Principle: ..................................................................................... 29
II.8 Photoluminescence Spectroscopy:..................................................................................... 30
II.8.1 Photoluminescence (PL) Principle: .............................................................................................. 31
II.8.2 Phosphorescence versus Fluorescence ....................................................................................... 32
III CHAPTER III: Results and Discussion: ............................................................................................ 33
III.1 Introduction: ..................................................................................................................... 34
III.2 X-Ray Diffraction Analysis: ................................................................................................. 34
III.3 Morphological characterization of ZnO:7 % Li+, Eu3+ (0, 0.5, 1 at. %) nanopowders. ......... 40
III.4 FT-IR analysis ..................................................................................................................... 43
III.5 Photoluminescence (PL) Analysis: ...................................................................................... 45
General Conclusion: ......................................................................................................................... 50Côte titre : MAPH/0483 En ligne : https://drive.google.com/file/d/1cZFBFOpco5THQ20ecRXpYkCSfyRK_vCw/view?usp=shari [...] Format de la ressource électronique : Effect of some sol-gel synthesis parameters on the luminescence properties of zinc (ZnO) nanopowder doped with trivalent europium (Eu3+) [texte imprimé] / Ahmed Abd Erraouf Laidoudi ; Lakhdar Guerbous, Directeur de thèse . - [S.l.] : Setif:UFA, 2021 . - 1 vol. (53 f.) ; 29 cm.
Langues : Anglais (eng)
Catégories : Thèses & Mémoires:Physique Mots-clés : Oxyde de zinc
Sol gel
ZnOIndex. décimale : 530 Physique Note de contenu : Sommaire
forward.
Introduction : .................................................................................................................................7
I CHAPTER I: Zinc Oxide ......................................................................................................................8
I.1 Transparent Conducting Oxides (TCO): ................................................................................9
I.1.1 Transparent Conducting Oxides Properties: .................................................................................. 9
I.2 Zinc Oxide (ZnO): .................................................................................................................9
I.2.1 Structural Proprieties ................................................................................................................. 10
I.2.2 ZnO Proprieties .......................................................................................................................... 11
I.2.2.1 Electronic Properties: ........................................................................................................ 11
I.2.2.2 Piezoelectric Properties: .................................................................................................... 12
I.2.2.3 Optical Properties: ............................................................................................................. 12
I.2.3 Some Applications of Zinc Oxide: ................................................................................................ 13
I.2.3.1 Photodetector: .................................................................................................................. 13
I.2.3.2 Gas Sensors: ...................................................................................................................... 13
I.2.3.3 Biosensors: ........................................................................................................................ 14
I.2.3.4 Laser: ............................................................................................................................... 14
I.2.3.5 Schottky Diodes: ................................................................................................................ 14
I.2.3.6 Nuclear and medical applications: ...................................................................................... 14
I.3 Rare-Earth Elements: ......................................................................................................... 15
I.3.1 Europium Ion (Eu): ..................................................................................................................... 16
II CHAPTER II: Synthesis methods of ZnO Nanoparticles .................................................................. 18
II.1 Nanopowder Definition: .................................................................................................... 19
II.2 Nanoparticles Synthesis Techniques: ................................................................................. 19
II.3 Lithium (Li+) Effect to ZnO: ................................................................................................ 20
II.4 Sol-Gel Route..................................................................................................................... 20
II.4.1 Definition: ................................................................................................................................. 20
II.4.2 Preparation of the nanopowders precursors: ............................................................................. 21
II.4.3 Reaction mechanisms: ............................................................................................................... 22
II.4.3.3 Parameters That Can Influence the Reaction: ..................................................................... 23
II.4.3.4 Annealing: ......................................................................................................................... 24
II.4.4 Doping A Material: ..................................................................................................................... 24
II.5 XDR Technique: ................................................................................................................. 25
II.5.1 Principal of XRD: ........................................................................................................................ 26
II.6 Fourier Transform Infrared Spectroscopy (FTIR): ................................................................ 26
II.6.1 FTIR Principle: ............................................................................................................................ 27
II.7 Scanning Electron Microscopy: .......................................................................................... 28
II.7.1 Scanning Electron Microscopy Principle: ..................................................................................... 29
II.8 Photoluminescence Spectroscopy:..................................................................................... 30
II.8.1 Photoluminescence (PL) Principle: .............................................................................................. 31
II.8.2 Phosphorescence versus Fluorescence ....................................................................................... 32
III CHAPTER III: Results and Discussion: ............................................................................................ 33
III.1 Introduction: ..................................................................................................................... 34
III.2 X-Ray Diffraction Analysis: ................................................................................................. 34
III.3 Morphological characterization of ZnO:7 % Li+, Eu3+ (0, 0.5, 1 at. %) nanopowders. ......... 40
III.4 FT-IR analysis ..................................................................................................................... 43
III.5 Photoluminescence (PL) Analysis: ...................................................................................... 45
General Conclusion: ......................................................................................................................... 50Côte titre : MAPH/0483 En ligne : https://drive.google.com/file/d/1cZFBFOpco5THQ20ecRXpYkCSfyRK_vCw/view?usp=shari [...] Format de la ressource électronique : Exemplaires (1)
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