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SUMMARY:Photophysics of molecular materials for photovoltaics - Dr. S.C.J.
  Meskers\, Molecular Materials and Nanosystems\, Eindhoven University of T
 echnology
DTSTART:20071113T143000Z
DTEND:20071113T153000Z
UID:TALK8924@talks.cam.ac.uk
CONTACT:Jan Anton Koster
DESCRIPTION:In organic photovoltaics\, usually combination of two molecula
 r materials is used as active layer. After excitation one of these materia
 ls acts as electron donor and the other as electron acceptor. \nPhotons th
 at are aborbed by these layers can be converted very efficiently into char
 ge carriers collected at the electrode at zero bias voltage(efficiency >50
  %)Molecular materials generally have a low dielectric constant (relative 
 dielectric constant 3-4) and it is not obvious how the photogenerated elec
 tron is separated from the hole against the Coulombic attraction. In this 
 seminar I will discuss spectroscopic studies aimed at clearifying the orig
 in of the high short circuit photocurrent in organic photovolatics.   \n
LOCATION:Small Lecture Theatre\, Cavendish Laboratory\, Department of Phys
 ics
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