Journal
APPLIED PHYSICS LETTERS
Volume 103, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4832075
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Funding
- Swedish Energy Agency
- Swedish Research Council
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Temperature dependent charge carrier mobility measurements using field effect transistors and density functional theory calculations are combined to show how the conformation dependent frontier orbital delocalization influences the hole-and electron mobilities in a donor-acceptor based polymer. A conformationally sensitive lowest unoccupied molecular orbital results in an electron mobility that decreases with increasing temperature above room temperature, while a conformationally stable highest occupied molecular orbital is consistent with a conventional hole mobility behavior and also proposed to be one of the reasons for why the material works well as a hole transporter in amorphous bulk heterojunction solar cells. (C) 2013 AIP Publishing LLC.
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