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DTSTAMP:20260412T182712
DTSTART:20170322T110000
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URL:https://murmitoyen.com/events/vanille/udem/detail/737877-conference-du-
 professeur-dwight-seferos-toronto
LOCATION:Université de Montréal - Pavillon J.-Armand-Bombardier\, 5155\, 
 chemin de la rampe \, Montréal\, QC\, Canada\, H3T 2B2
SUMMARY:Conférence du Professeur Dwight Seferos (Toronto)
DESCRIPTION:Titre : “Conjugated Polymers that Contain Selenium and Tellur
 ium''Endroit : Pavillon J.-Armand Bombardier\, salle 1035 à 11 h.Hôte 
 : Professeur Will Skene
\nCette conférence sera prononcée (en anglais)
  par le Professeur Dwight Seferos du département de chimie de l'Universi
 té de Toronto.
\nRésumé : For over 7 years my group has been fascinated
  by how tellurium and selenium can influence the optoelectronic properties
  of conjugated electronic materials. Some of our work has focused on the d
 evelopment of conjugated polymers that self-organize at the nanoscale by s
 pontaneous phase-separation. We have been interested in conjugated block c
 opolymers where each block contains a distinct heterocycle. These polymers
  are fundamentally important for testing the limits of polymer phase separ
 ation. They are also useful in optoelectronic devices where nanoscale stru
 cture is important\, such as solar cells. In this context we have develope
 d selenophene-thiophene block copolymers and discovered that these copolym
 ers undergo a significant amount of phase separation. This is surprising g
 iven the chemical similarity of the repeat units\, however we have uncover
 ed several properties\, including crystal packing\, that differ in these p
 olyheterocycles. By increasing the compatibility of the selenophene and th
 iophene units and we observe co-crystallization in statistical copolymers.
  These statistical copolymers form nanowires and when fabricated into nano
 wire solar cells they operate with a greater efficiency than cells compose
 d of homopolymer nanowires. We have also learned how to synthesize polymer
 s and delocalized molecules based on tellurophene\, and identified several
  unexpected properties in these materials including reversible binding of 
 small molecules\, and the ability to photo-reductively eliminate halogens.
  The synthesis\, properties and optical applications of these materials wi
 ll be discussed.
\nInformation supplémentaireAffiche de la conférence
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