Séminaire - 02/06/2022 - Victor Malgras - Mesoporous films as platform for optically active nanocomposites

Invitation : Nathalie Mangelinck-Noël (Eq. MCA, Dep. MATER)

Diffusion : IM2NP, CiNaM, Irphe, LP3, Madirel (via P. Boulet), PIIM (via T. Angot), CPT (T. Martin), Fédération de Chimie (via S. Viel)

Jeudi 2 juin 2022 à 11h

Salle des séminaires de l'Im2np, campus de Saint-Jérôme, 1er étage Bâtiment Poincaré

Victor Malgras

IM2NP, Aix Marseille Univ, Université de Toulon, CNRS, IM2NP, Marseille, France

Mesoporous films as platform for optically active nanocomposites

 Mesoporous oxides have the ability to host nanoscopic cavities that can act as reactors for the growth of monodisperse nanocrystals. On the other hand, lead-halide-based perovskites have interesting optical properties with prospects in both photovoltaic and light-emitting technological fields. Another great advantage of this family of materials is their simple chemical synthesis involving no by-product. In such conditions, the properties of perovskite nanocrystals isolated in a silica matrix, or connected with a semiconducting titania skeleton, can yield promising implications for optoelectronic applications.

Here I will expose the strategy put in place to elucidate the role of mesoporous oxides as a template to confine the growth of methylammonium halide and mixed halides perovskite nanocrystals, and reveal to what extent the properties can be manipulated through controlling the initial template pore size, from 7 to 3 nm. Details will also be provided on the fabrication and characterization of mesoporous TiO2 (semiconducting) films with long-range pore ordering used as a plateform to establish the premise of a new concept of perovskite quantum dots LED.