Highlights 2023 - UNRAVELING THE FORMATION MECHANISM OF 2D/3D PEROVSKITE HETEROSTRUCTURE FOR PEROVSKITE SOLAR CELLS USING MULTI-METHOD - SOUTENANCE DE THESE « SYNTHESE ET CARACTERISATION DE FILMS DE CLATHRATES DE SILICIUM POUR DES APPLICATIONS PHOTOVOLTAÏQUES » - PHD DEFENSE « GROWTH AND CHARACTERIZATION OF CUPROUS OXIDE ABSORBERS FOR PHOTOVOLTAICS » - ROLE OF CU CONTENT IN THE CRYSTAL STRUCTURE AND PHASE STABILITY OFEPITAXIAL CU(IN,GA)S2 FILMS ON GAP/SI(001)