| Titre : | Study of solar blind photodetector based on beta gallium oxide (ꞵ-Ga₂O₃) |
| Auteurs : | NOUMIDIA AMMARI, Auteur ; Afak Meftah., 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, 2023 |
| Format : | 1vol(54) |
| Langues: | Français |
| Mots-clés: | Beta gallium oxide, solar blind photodetector, Silvaco-Atlas. |
| Résumé : |
In recent years, the solar-blind photodetectors based on ꞵ-Ga₂O₃ are attractive due to their simple fabrication process and its photodetection performance. Our study is about InZnSnO2 (IZTO)/β-Ga₂O₃ solar blind Schottky barrier diode photodetector (PhD). It was realized succefully by Silvaco-Atlas simulation. The first part of our study is to expose this device to light source (LED) (255 nm, 385 nm and 500 nm) with a power density of 1 mW/cm²and It was simulated J-V, responsivity, response time characteristics and compared with measurement. In the second part of our study is study the effect of reducing trap densities (deep and shallow trap) on performance of the photodetector. When we decrease in deep trap densities, we notice that the saturation zone current is decrease. However, when the decreasing shallow traps densities, we notice that The decay time was shorter (∼0.019s for ET=0.55 eV). However, it was be slower when the trap is deeper because we find his value forET=0.74 eV is ~0.38 s and for ET=1.04 eV is ~0.099s. So, this indicates that the shallowest traps had the dominant influence (ET=0.55 eV) on the persistent photoconductivity phenomenon. Furthermore, with decreasing trap densities, this PhD can be considered as a self-powered solar-blind photodiode (SBPhD).
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| Sommaire : |
Dedecation ............ i
Acknowledgments ......... ii Abstract ................. iv Table of contents ........ v List of figures ......... x List of tables .......... xiii List of abriviations ........ xiv General introduction ........... 1 CHAPTER I : Fundamental properties of beta gallium oxide ꞵ-Ga₂O₃ . I.1.Introduction ......... 4 I.2.History of gallium oxide .... 4 I.3.Gallium oxide......... 8 I.3.1. Polymorphs ........... 8 I.4.Beta gallium oxide ꞵ-Ga₂O₃ ......... 11 I.5.Fundamental properties of ꞵ-Ga₂O₃ ............ 12 I.5.1.Crystal structure of ꞵ-Ga₂O₃ .............. 12 I.5.2.Electronic tructure of ꞵ-Ga₂O₃ ................ 13 I.5.3.Main defects on ꞵ-Ga₂O₃ ................ 14 vi I.5.3.1. Intrinsic defects ....... 15 I.5.3.1.1.Oxygen vacancies ........ 15 I.5.3.1.2.Gallium vacancies .......... 15 I.5.3.1.3. Oxygen interstitial ( |
Disponibilité (1)
| Cote | Support | Localisation | Statut |
|---|---|---|---|
| MPHY/620 | Mémoire master | bibliothèque sciences exactes | Consultable |
