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SUMMARY:Scanning Probe Microscopy of Active Polymer Electronic Devices - D
 avid Ginger\, University of Washington\, Seattle
DTSTART:20080805T133000Z
DTEND:20080805T141500Z
UID:TALK12965@talks.cam.ac.uk
CONTACT:Jan Anton Koster
DESCRIPTION:The morphology of nanostructured blends has a dramatic influen
 ce on the performance of polymer solar cells and other devices. We use sca
 nning probe microscopy techniques such as time-resolved electrostatic forc
 e microscopy\, conductive and photoconductive AFM\, and scanning Kelvin Pr
 obe microscopy to map local charge generation\, recombination\, transport\
 , and injection in active polymer thin film devices ranging from polymer s
 olar cells to polymer light-emitting electrochemical cells (LECs).  We cor
 relate these local properties with the bulk device performance to show tha
 t there is still room to improve some fullerene blend solar cells using be
 tter processing and improved anode materials\, that most photocurrent is g
 enerated away from the visible domain interfaces in classic polyfluorene b
 lends\, and that the Heeger p-i-n diode model does not accurately describe
  the operation of the most commonly studied planar LEC structures.
LOCATION:IRC Superconductivity Seminar Room\, Cavendish Laboratory\, Depar
 tment of Physics
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