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DTSTAMP:20260415T080141
DTSTART:20140603T110000
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URL:https://murmitoyen.com/events/vanille/udem/detail/442059
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Small Molecule Squaraine Donor Materials in Bulk Heterojunction Org
 anic Solar Cells – Susan Spencer\, Rochester Institute of Technology\, N
 ew York
DESCRIPTION:Small Molecule Squaraine Donor Materials in Bulk Heterojunction
  Organic Solar Cells Susan Spencer\, PhD Candidate in Microsystems Enginee
 ring\, Rochester Institute of Technology Rochester\, New YorkThe Collison 
 Group focuses research efforts on developing novel squaraine materials for
  use in solution-processed single junction organic solar cells.  By chang
 ing the molecular structure of the squaraine\, we can change its fundament
 al properties of absorption\, aggregation\, and crystallinity\, all of whi
 ch impact the efficiency of the solar cell.. Our goal is to improve the ef
 ficiency through prescriptive description of molecular structure of materi
 als\, which requires us to take advantage of squaraines’ unique properti
 es in determining improved mechanistic understanding of the solar cells. T
 his talk will focus on recent results demonstrating efficiencies of >4% an
 d how those results can be explained with both theory and experiment. The 
 characterization of the materials will be briefly described\, and a short 
 discussion of excitonic theory will be given as it relates to the presence
  of H- and J-aggregates within the photovoltaic. The proposed impact of th
 ese aggregates on the process of charge photogeneration will be presented\
 , including a discussion of the application of Marcus-Hush theory to the c
 rucial step of exciton dissociation at the bulk heterojunction. Current an
 d future experiments will be highlighted\, with a focus on the blending of
  experiment\, computational modeling\, and theory that drives the research
  of the group.Cette conférence est présentée par le RQMP Versant Nord d
 u Département de physique de l'Université de Montréal et le Départe
 ment de génie physique de Polytechnique Montréal.
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