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F2.04 - Using Nanostructures to Orient Molecules in Polymer-Based Solar Cells 
Date/Time:
April 22, 2014   2:30pm - 3:00pm
 
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Solar cells based on polymer semiconductors have composite active layers formed by phase separation of blended donor and acceptor materials. Achieving optimal device performance requires a delicate balance of trapping the blended material in a non-equilibrium configuration. We have been focused on understanding the relationship between the molecular structure of films of polymer semiconductors and the efficiency with which photogenerated charge is collected from the material. I will discuss experiments controlling the polymer semiconductor molecular orientation by confining it within nanometer-scale volumes using both imprint lithography as well as templating by means of lithography and self assembly. Synchrotron-based grazing incidence x-ray diffraction measurements allow us to correlate the material’s molecular structure and its electronic and photovoltaic properties.
 


 
 
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