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SUMMARY:Modelling and improving (hybrid) bulk heterojunction solar cells -
  Jan Anton Koster\, University of Groningen
DTSTART:20061003T133000Z
DTEND:20061003T143000Z
UID:TALK5314@talks.cam.ac.uk
CONTACT:Chris McNeill
DESCRIPTION:In order to identify the factors that limit the efficiency of 
 bulk heterojunction (BHJ) solar cells\, a model describing the electrical 
 properties of BHJs is proposed. In the metal-insulator-metal model the gen
 eration and transport processes in the BHJ are treated as if occurring in 
 one virtual semiconductor. The main virtue of this model is that it relate
 s solar cell performance to basic physics and material properties such as 
 charge carrier mobilities.\n\nWith respect to improving these devices\, it
  is demonstrated that the optimal band gap of the absorbing polymer is clo
 se to 1.9 eV. Moreover\, although still not as efficient as inorganic sola
 r cells\, polymer/fullerene based devices can reach an efficiency of more 
 than 10%.\n\nHybrid organic/inorganic solar cells\, based on inorganic nan
 oparticles and conjugated polymer are an auspicious alternative to polymer
 /fullerene devices. The transport properties of polymer/zinc oxide nanocry
 stals blend films are investigated.
LOCATION:Small Lecture Theatre\, Cavendish Laboratory\, Department of Phys
 ics
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