| Titre : | Otical and electrical prpoprities of MgO thin films |
| Auteurs : | Mouhammed .ES. Salih Baghezza, 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, 2019 |
| Format : | 1 vol. (60 p.): couv. ill. en coul / 29 cm |
| Langues: | Français |
| Résumé : |
In this work, Magnesium Oxide (MgO) thin films were deposited on galas substrate (350°C) by pneumatic technique. The effects of concentration molarity in the rang (0.05; 0.1; 0.15 and 0.2M) were successfully investigated. The high optical transmission was found in the deposited MgO thin film with lowest molarity it is 60%. The transmittance of MgO thin films decreases rapidly as the wavelength increases in the range of (300-400) nm, and then increases slowly at higher wavelengths. The band gap of MgO thin films decreases as the molarity increases and the band gap values range between 4.8-4.3 eV. The Urbach energy values range between 375-519 meV. The electrical resistance of our films in the order 2*107Ω. |
| Sommaire : |
Acknowledgements Table of contents………………………………………………………………………. I General introduction……………………………………………………………………... 02 ChapterI: MgO thin films I.1. Introduction………………………………………..……………………..……….. 04 I.2 Definition of a thin layer……………………………...…………………...……… 05 I.3 MgO Thin films ………………………..…………………..…………….………... 06 I.4 Elaborations Methods of MgO thin films……………………………….……… 08 I.4.1 Physical Vapor Deposition Techniques………..……………….…….……… 09 I.4.2 Molecular Beam Epitaxy (MBE)………………………….………………… 10 I.5 Applications)………………………….…………………… …………………. 12 Medical applications………………………..…………………………………….. 13 I.6 Conclusion)………………….…………………………………………………. 13 References)………………………….…………………………………………….… 13 Chapter II : Experimental Section II.1.Introduction ………………………………………………………………….. 17 II.2. Elaboration………………………………………….……………………….. 17 II.2.1. Spray pneumatique technique (SPT)………………….…………………….. 18 II.2.2. Advantages of spray pneumatique …………………………………………. 18 II.2.3. Preparation of the substrate………………………………..……………….. 18 A) Glass Substrates……………………………………..………………………….. 18 B) Substrate Cleaning Process …………………………………………………….. 19 II.2.4. Preparation of the solution…………………………………..……………… 19 II.2.5. Depositing of thin films…………………………………………………….. 20 II.3. Characterization of the films ……………………………….…..…………. 21 II.3.1.Electrical Conductivity Measurement………………………..……………… 21 II.3.2. Optical characterization…………………………………….……………….. 22 A) Ultraviolet–visible spectroscopy……………………………………….……… 22 B) Principle of ultraviolet-visible absorption……………………………………… 23 II.4. Conclusion…………………………………………………………………… 24 References ………………………………………………………………………… 24 IIChapter III : Results and Discussion III.1. Introduction………………………………………………… …………… 26 III.2. molarity effect on optical properties of MgO thin films................................. 26 III.3: Molarity effect on Electrical properties of MgO thin films............................. 32 III.4. Conclusion........................................................................................................... 33 References..................................................................................................................... 33 General conclusion………………………………………………………………….………… 36 |
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| Cote | Support | Localisation | Statut |
|---|---|---|---|
| MPHY/504 | Mémoire master | bibliothèque sciences exactes | Consultable |
