Investigation of ZnO Thin films prepared by spray pyrolysis for UV photodetector applications / Mechri Bendjemai

Public ISBD Titre : Investigation of ZnO Thin films prepared by spray pyrolysis for UV photodetector applications Type de document : document multimédia Auteurs : Mechri Bendjemai, Auteur ; Hamza Benhorma, Auteur ; Abdellah Rahmani, Directeur de thèse Editeur : Laghouat : Université Amar Telidji - Département d'électronique Année de publication : 2024 Importance : 60 p. Accompagnement : 1 disque optique numérique (CD-ROM) Note générale : Instrumentation Langues : Anglais (eng) Mots-clés : Thin film  ZnO  X-ray diffraction (XRD)  Electrical conductivity  Spray pyrolysis  UV photodetector Résumé : Ultraviolet (UV) radiation poses significant health risks and environmental concerns, necessitating advanced detection methods. This study explores the fabrication of zinc oxide (ZnO) thin films on silicon and glass substrates using the spray pyrolysis technique, optimized through careful control of deposition parameters including spray nozzle-substrate distance, deposition temperature, and solution concentration. The deposited ZnO films were utilized to develop UV photodetectors. Spray pyrolysis, known for its simplicity and cost-effectiveness, enabled the uniform deposition of ZnO films. Optical and structural properties were characterized using UV-Visible spectrophotometry and X-ray diffraction (XRD), respectively. The study specifically investigated the UV detection properties of the ZnO films. Results demonstrate that the ZnO-based photodetectors exhibited high sensitivity and response to UV light. Electrical conductivity measurements further validated the films' suitability for UV photodetection applications. This research highlights the efficacy of spray pyrolysis in producing ZnO thin films with tailored properties for UV photodetection, suggesting their potential in areas such as environmental monitoring and UV-related health assessments. note de thèses : Mémoire de master en électronique Investigation of ZnO Thin films prepared by spray pyrolysis for UV photodetector applications [document multimédia] / Mechri Bendjemai, Auteur ; Hamza Benhorma, Auteur ; Abdellah Rahmani, Directeur de thèse . - Laghouat : Université Amar Telidji - Département d'électronique, 2024 . - 60 p. + 1 disque optique numérique (CD-ROM). Instrumentation Langues : Anglais (eng) Mots-clés : Thin film  ZnO  X-ray diffraction (XRD)  Electrical conductivity  Spray pyrolysis  UV photodetector Résumé : Ultraviolet (UV) radiation poses significant health risks and environmental concerns, necessitating advanced detection methods. This study explores the fabrication of zinc oxide (ZnO) thin films on silicon and glass substrates using the spray pyrolysis technique, optimized through careful control of deposition parameters including spray nozzle-substrate distance, deposition temperature, and solution concentration. The deposited ZnO films were utilized to develop UV photodetectors. Spray pyrolysis, known for its simplicity and cost-effectiveness, enabled the uniform deposition of ZnO films. Optical and structural properties were characterized using UV-Visible spectrophotometry and X-ray diffraction (XRD), respectively. The study specifically investigated the UV detection properties of the ZnO films. Results demonstrate that the ZnO-based photodetectors exhibited high sensitivity and response to UV light. Electrical conductivity measurements further validated the films' suitability for UV photodetection applications. This research highlights the efficacy of spray pyrolysis in producing ZnO thin films with tailored properties for UV photodetection, suggesting their potential in areas such as environmental monitoring and UV-related health assessments. note de thèses : Mémoire de master en électronique

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ZnO thin films deposition for the manufacture of (VOCs) gas sensor / Chaima Hadjari 

Public ISBD Titre : ZnO thin films deposition for the manufacture of (VOCs) gas sensor Type de document : document multimédia Auteurs : Chaima Hadjari, Auteur ; Halima Ben Messaoud, Auteur ; Abdellah Rahmani, Directeur de thèse Editeur : Laghouat : Université Amar Telidji - Département d'électronique Année de publication : 2023 Importance : 70p. Accompagnement : 1 CD ROM Optique Némérique Note générale : OPTION: Instrumentation Langues : Anglais (eng) Mots-clés : Thin film, ZnO, DRX, Electrical conductivity, Pyrolysis spray, Gas sensor Résumé : Volatile organic compound (VOCs) are the main sources of pollutants in the indoor environment and are considered to be very harmful to the human body. Therefore, more work is needed regarding the detection and development of vapor detection methods. In this study, we have developed thin layers of zinc oxide (ZnO) on a silicon substrate using the spray pyrolysis technique. The deposition conditions such as the distance between the spray nozzle and the substrate, deposition temperature, and molarity of the solution were carefully controlled. The ZnO deposit was used to build a gas sensor capable of detecting vapors of volatile organic compounds. The spray pyrolysis technique is a simple and cost-effective method that is easy to implement. The optical and structural properties were investigated using UV-Visible spectrophotometry and X-ray diffraction (DRX). We specifically investigated the detection properties of the ZnO film for different VOCs type. The results indicated that the ZnO-based sensors exhibited higher sensitivity towards acetone vapor (VOC) compared to the other two tested VOCs, namely ethanol and methanol. note de thèses : Memoire de Master en Electronique ZnO thin films deposition for the manufacture of (VOCs) gas sensor [document multimédia] / Chaima Hadjari, Auteur ; Halima Ben Messaoud, Auteur ; Abdellah Rahmani, Directeur de thèse . - Laghouat : Université Amar Telidji - Département d'électronique, 2023 . - 70p. + 1 CD ROM Optique Némérique. OPTION: Instrumentation Langues : Anglais (eng) Mots-clés : Thin film, ZnO, DRX, Electrical conductivity, Pyrolysis spray, Gas sensor Résumé : Volatile organic compound (VOCs) are the main sources of pollutants in the indoor environment and are considered to be very harmful to the human body. Therefore, more work is needed regarding the detection and development of vapor detection methods. In this study, we have developed thin layers of zinc oxide (ZnO) on a silicon substrate using the spray pyrolysis technique. The deposition conditions such as the distance between the spray nozzle and the substrate, deposition temperature, and molarity of the solution were carefully controlled. The ZnO deposit was used to build a gas sensor capable of detecting vapors of volatile organic compounds. The spray pyrolysis technique is a simple and cost-effective method that is easy to implement. The optical and structural properties were investigated using UV-Visible spectrophotometry and X-ray diffraction (DRX). We specifically investigated the detection properties of the ZnO film for different VOCs type. The results indicated that the ZnO-based sensors exhibited higher sensitivity towards acetone vapor (VOC) compared to the other two tested VOCs, namely ethanol and methanol. note de thèses : Memoire de Master en Electronique

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