| Titre : | Study the effect of F and Co co-doped NiO thin films on Electrical and optical properties. |
| Auteurs : | Youbi Reghaia, Auteur ; Said Benramache, Directeur de thèse |
| Type de document : | Monographie imprimée |
| Editeur : | Biskra [Algérie] : Faculté des Sciences Exactes et des Sciences de la Nature et de la Vie, Université Mohamed Khider, 2018 |
| Format : | 1 vol. (45 p.) / 30 cm |
| Langues: | Anglais |
| Mots-clés: | NiO,Thin films,Co,F,Spray pneumatic technique. |
| Résumé : |
The aim of this work is to study the influence of Co and F codoping on NiO thin films by spray pneumatic technique, on structural, optical and electrical properties. The contents of Co and F codoped NiO thin films were Co/Ni = 0.02 and 0.03, F/Ni = 0.04, 0.08 and 0.12 were successfully deposited on glass substrate by spray pneumatic method using nickel chloride hexahydrate, cobalet chloride and hydrogen florin. The effect of Co and F co-doping on optical, structural and electrical properties of on NiO thin films were investigated. XRD patterns of the Co and F co-doping NiO thin films indicate that the obtaining thin films are monoocrystalline with (111) plan in nature with cubic structure. The maximum value (13.91 nm) was observed with 2%Co and 12%F. The transmission spectra show that the Co and F codoped NiO thin films have a good optical transparency in the visible region. The band gap energy was increased with increasing the Co and F contents in all deposited samples. The minimum Urbach energy was reached at 3%Co and 12%F, it is 0.361 eV. The minimum electrical resistance of the Co and F co-doping NiO films was located at 2%Co and 12%F. |
| Sommaire : |
List of Contents i NO.Contents Page Acknowledgements Table of contents i. General introduction 2 Chapter I :The semiconductor p-Type NiO I.1. Introduction 5 I.2. NiO thin film 5 I.2.1 Electrical properties of NiO thin films 6 I.2.2 Optical properties of NiO thin films 7 I.3. The rool of doped NiO thin films 7 I.4. The rool of co-doped NiO thin films 9 I.5. Introduction of gas sensors 10 I -5-1 sensor 10 I -5-2 Gas sensor 10 I -5-3 Gas sensing technologies 10 I.6. Nickel oxide as gas sensing 11 I.7. The results of NiO application 11 I.8. Methods preparation 12 List of Contents ii I.8.1 SprayPyrolysis 13 I.9. Conclusion 13 Reference 13 Chapter II : Elaboration and characterizations II.1 Introduction 17 II.2 Elaboration 17 II.2.1 Spray Technique 17 II.2.2 Mechanism 17 II.2.3 Advantages of the Spray 18 II.2.4 disadvantage of the Spray 18 II.3 Parameters of the deposition 19 II.4 Preparation 19 II.4.1 Preparation of solution 19 II.4.2 Preparation of glass substrate 21 II.4.3 Preparation of NiO thin films 22 II.4.4 Preparation of Co and F codoped 22 II.5 Characterization 26 II.5.1 Ray Diffraction (XRD) : 26 List of Contents iii II.5.2 Ultraviolet–visible spectroscopy: 28 II.5.3 Electrical Conductivity Measurement 29 II.5 Conclusion 30 Reference 30 Chapter III : Results and discussion III.1 Introduction 32 III.1 Structural properties of Co and F codoped NiO thin films 34 III.2 Optical characteristics of Co and F codoped NiO thin films 37 III.3 Electrical properties Co and F codoped NiO thin films 42 III.4 Conclusion 43 References 43 General conclusion 47 |
| Type de document : | Mémoire master |
Disponibilité (1)
| Cote | Support | Localisation | Statut |
|---|---|---|---|
| MPHY/432 | Mémoire master | bibliothèque sciences exactes | Consultable |
