à 
Prix: Entrée libre
Salle 1035
5155, avenue Decelles
Montréal (QC) Canada  H3T 2B1

Titre : Color in Conjugated Polymers: Electrochromism and Photovoltaics.
Endroit : Pavillon J.A.-Bombardier, salle 1035 à 11 h
Hôte : William Skene

La conférence sera prononcée par le professeur John Reynolds, des écoles de chimie et de biochimie ainsi que de science des matériaux et de génie au sein du Georgia Institute of Technology. Elle est commanditée par le Centre de recherche sur les materiaux auto-assemblés (CRMAA) et sera donnée en anglais.

Résumé : Conjugated molecules, oligomers and polymers with intimately interacting donor-acceptor moieties provide light harvesting and electronic energy levels that can be tuned to optimize their utility in electrochromic, along with both bulk heterojunction and dye sensitized solar cell applications. In this presentation, we will explore the combination and interaction of a breadth of electron rich and electron poor species that ultimately allow us to prepare polymer films with band gaps that range from 4 eV in the UV to near 0.5 eV in the infrared. The flexible synthetic chemistry of dioxythiophene-based polymers has allowed us to complete the color palette (yellow, orange, red, purple/magenta/, blue, cyan, green, and black) of vibrantly colored to highly transmissive switching, spray- and blade-coat processed electrochromes of any color, with donor-acceptor interactions especially enabling materials that are black, green and cyan in color. Donor-Acceptor-Donor (DAD) triads with internally fused DA cores provide a means of examining multi-colored chromophores for charge injection to metal oxide electrodes. DA polymers synthesized using a broad selection of co-monomers, provides donor polymers, which, in conjunction with PCBM, yield solar cells with power conversion efficiencies of 7-8%, while providing color control. Combination of multi-layer solution processing allows the construction of solar powered electrochromic windows.

Information supplémentaire
Annonce PDF de la conférence

Conférence CRMAA avec le Professeur John Reynolds (Georgia Tech)
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