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Publication Citation: Terahertz Mobility Measurements on P3HT Films: Device Comparison, Molecular Weight and Film Processing Effects

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Author(s): Okan Esenturk; Joseph S. Melinger;
Title: Terahertz Mobility Measurements on P3HT Films: Device Comparison, Molecular Weight and Film Processing Effects
Published: Date Unknown
Abstract: We report the first direct comparison of relative carrier mobilities in semiconducting organic polymer films measured using non-contact optical pump terahertz probe spectroscopy to those reported in electrical device studies. Relative transient signal amplitude measurements of photo-injected mobility as a function of polythiophene (P3HT) molecular weight correlate directly with electrical device test values, indicating that the THz method shows promise as a rapid materials screening approach. We also present new measurements on P3HT conducting films as a function of structural regularity, dispersing solvent, addition of C60 electron traps, sample temperature and other growth parameters relevant to device manufacture.
Citation: Journal of Applied Physics
Keywords: mobility;organic semiconductor;P3HT;photoconductivity;terahertz;THz
Research Areas: Vibrational, Polymers, Semiconductors, Semiconductor Materials, Optical Properties of Materials, Optical Properties of Materials, Spectroscopy, Optoelectronics