“SIFIPLASMON” Plasmonic metal oxide nanostructures and molecular thin films for a novel generation of electrochromic smart windows

Event Date
Monday, 8 November 2021 - 12:00pm
Sandrine Heutz

Dr. Anthony MAHO – Imperial College London (UK) & University of Liège (BE)

Monday 8th November at 12pm

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Doped metal oxides such as indium-tin oxide (ITO) have been used for decades as convenient and efficient visibly-transparent

conducting materials in numerous optoelectronic devices. When processed as nanocrystals (NCs), these are further known to bear localized surface plasmon resonance (LSPR) properties responsible for intense absorption in the near-infrared (NIR) wavelength range.

This talk will first highlight how NCs of ITO and other doped metal oxides can be processed into plasmonic electrochromic thin films, allowing for the design of dynamic NIR, heat-filtering smart windows devices characterized by extremely fast switching kinetics, high levels of optical contrast and coloration efficiency, and important cycling durability. Focus will be put on their synthetic approaches, both as colloidal nanoparticles (Schlenk line, hydrothermal protocols) and as thin functional coatings onto glass substrates from wet methodologies.

The presentation will also tackle recent, original experimental developments targeting more sustainable, self-powered architectures of plasmonic electrochromic materials. These involve singlet fission organic chromophores in a will to promote in-situ generation of electrons that will be able to accumulate in the deposited layers of ITO NCs, and thereby allow the dynamic tuning of their LSPR properties without the need of an external electrical bias. More particularly, the hybridization of pentacene and/or tetracene molecular layers, processed through organic molecular beam deposition (OMBD), with ITO NCs films will be presented and discussed.