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Band bending in conjugated polymer layers

  • We use the Kelvin probe method to study the energy-level alignment of four conjugated polymers deposited on various electrodes. Band bending is observed in all polymers when the substrate work function exceeds critical values. Through modeling, we show that the band bending is explained by charge transfer from the electrodes into a small density of states that extends several hundred meV into the band gap. The energetic spread of these states is correlated with charge-carrier mobilities, suggesting that the same states also govern charge transport in the bulk of these polymers.

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Author details:Ilja Lange, James C. Blakesley, Johannes Frisch, Antje Vollmer, Norbert Koch, Dieter NeherORCiDGND
DOI:https://doi.org/10.1103/PhysRevLett.106.216402
ISSN:0031-9007
Title of parent work (English):Physical review letters
Publisher:American Physical Society
Place of publishing:College Park
Publication type:Article
Language:English
Year of first publication:2011
Publication year:2011
Release date:2017/03/26
Volume:106
Issue:21
Number of pages:4
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer review:Referiert
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