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Université de Bordeaux
LabEx AMADEusCluster of Excellence
Cluster of excellence

AMADEus Seminar - Prof. Benoît Lessard - Thursday 20 september 2018 - 2:00 pm -ENSCBP (Amphi 1)

le jeudi 20 septembre 2018 à 14h

Pr. Benoît Lessard

Department of Chemical and Biological Engineering

University of Ottawa


"Organic photovoltaics and biosensors: from material design to prototype engineering"

Dernière mise à jour jeudi 13 septembre 2018
AMADEus Seminar - Prof. Benoît Lessard - Thursday 20 september 2018 - 2:00 pm -ENSCBP (Amphi 1)

Organic electronics utilize carbon-based semiconductors, which present an interesting alternative to conventional inorganic silicon. In addition to the potential for low manufacturing costs and flexible integration; carbon-based molecules can easily be chemically tuned to obtain different electrical and photonic properties, they can be made to contain desirable functional groups, and they can be modified to interact (or not) with the environment or various specific analytes.

          The Lessard Research Group focuses on the development of novel functional carbon based materials and polymers for use in next generation organic electronics. The group has projects that span the development of inexpensive flexible photonic devices such as solar cells and OLEDs to polymer based CO2 sensors and highly selective bio-sensors. We develop structure property relationships between material engineering, thin film processing and prototype performance. From synthesis to device fabrication and prototype evaluation, our group can study the subtle yet crucial cross disciplinary aspects which are often overlooked by researchers that only focus on only the chemistry or the device physics. We focus work closely with industry and have multiple ongoing partnerships in material synthesis as well as device fabrication.

This seminar will cover our current expertise and our recent developments in the field of organic electronics. We will discuss our use of stable inexpensive dyes, such as silicon phthalocyanines in organic thin film transistors and organic solar cells. We will discuss the importance of processing parameters, surface chemistry and molecular structure with respect to film crystallinity and device performance. We will also discuss some recent projects in studying the device stability and lifetime of high performing semiconductor polymers in OTFTs. Finally, we will discuss our recent progress in developing selective DNA sensors and the integration of OTFTs into microfluidic devices for aqueous in-situ detection.

Short Bio: Prof. Benoit H. Lessard was appointed as an Assistant Professor in the Department of Chemical & Biological Engineering at University of Ottawa, (Ontario, Canada) in May 2015. Since then he was awarded the Tier 2 Canada Research Chair in Advanced Polymer Materials and Organic Electronics, 2018 Ontario Early Researcher Award and the 2015 Charles Polanyi Prize in Chemistry. Prof. Lessard was also awarded one of the 2017 Emerging Leaders of Chemical Engineering Plenary Presentation at Canadian Chemical Engineering Society, 67th Annual Conference (Edmonton, AB) and named a 2018 J. Mater. Chem. C Emerging Researcher. Prior to joining uOttawa, Prof. Lessard completed an NSERC Banting Fellowship at the University of Toronto studying crystal engineering and OPV/OLED fabrication. Prior to that he completed his PhD in polymer chemistry and reaction engineering at McGill University, where he was awarded the NSERC Alexander gram bell CGS as well as the MSED-LANXESS PhD thesis award in polymer science.

Prof. Lessard founded the Lessard Research Group in May 2015, which currently employs 2 Postdocs, 8 PhD students, 4 MASc students and 6 undergraduate students. Prof. Lessard has attracted over $3.3M in independent research grants and has several partnerships with Canadian industry. Since 2008, Prof. Lessard has published 58 peer reviewed journal articles, 8 patent applications, 1 book chapter and presented his work at over 56 international and national conferences.

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