Télécharger La thèse :

Titre: Fabrication, characterization and luminescence properties of rare earth doped BaAl2O4 phosphor for solid state lighting

Domaine: Mathématiques informatique (MI)

Filière: Physique

Option: PHYSIQUES : SC/DES MATERIAUX

Auteur: BENOURDJA Saadia

Soutenu (e) le: 20/04/2019

Sous la direction de: CHAHED Larbi, Professeur, Université Oran 1

Co-directeur:CAN Nurdogan, Professeur, Jazan University, Arabie Saoudite

Le président du jury : KHELIL Abdelbacet, Professeur, Université Oran 1

Examinateur1: TADJEDDINE Abderrahmane, Professeur, Université Paris-Sud-Orsay, France

Examinateur2: KADOUN Abd-Ed-Daïm, Professeur, Université Djilali Liabès, Sidi Bel-Abbès

Examinateur3: KAIL Fatiha, Professeur, Université Oran 1

Mention: Très honorables

Résumé:

A novel phosphor BaAl2O4 doped with different rare earth ions (Tb, Pr and Sm) are developed by solid-state reaction (SSR) method and combustion method. X-Ray diffraction (XRD) patterns are recorded in order to see the structure of the compound and detect that the presence of dopants has an e?ect on the basic crystal structure of the phosphor materials. Energy dispersive spectroscopy (EDS) and electron microscope images are taken for chemical and structural properties of the materials. In this research, cathodoluminescence emission spectrum recorded under excitation with the electron beam of BaAl2O4 activated with Pr, Tb and Sm ions are reported and possible energy transitions will be studied in detail. In addition to that, a series of thermoluminscence (TL) measurements for the temperature range from room temperature up to 400°C are performed. TL response, heating rate properties, as well as peak shapes are investigated. It is expected that prepared phosphor materials will be very suitable for use a promising luminescence material in solid state lighting (SSL) applications which promotes renewable energy technologies.


Mots clefs: BaAl2O4; XRD; SEM; EDS; Cathodoluminescence; Thermoluminescence; Rare Earths; Terbium; Praseodymium; Samarium.


Publications associées à la thèse

Article TH5016:

Titre: Preparation and cathodoluminescence characteristics of rare earth activated BaAl2O4 phosphors

Revue: Applied Radiation and Isotopes

Référence: Applied Radiation and Isotopes 139 (2018) 34–39

Date: 18 April 2018