title: Voltage-modulated millimeter-wave spectroscopy on a polymer diode: mesoscopic charge transport in conjugated polymers.
abstract: We present a new technique to determine the carrier mobility mu in semiconducting, undoped, conjugated polymers in the millimeter-wave frequency range, 10-500 GHz. This method probes charge conduction on mesoscopic length scales, a regime inaccessible to other transport experiments. The experiment is based on the detection of millimeter-wave absorption of field-induced charge in polymer diodes, and is applied to poly( p-phenylene vinylene). We demonstrate that locally mu can be as high as 10(-4) m(2)/V s, and deduce the typical hopping parameters in the mesoscopic high- mu regions in the material.
authors.affiliation: Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands.
authors.forename: H C
authors.initials: HC
authors.lastname: Martens
authors.forename: O
authors.initials: O
authors.lastname: Hilt
authors.forename: H B
authors.initials: HB
authors.lastname: Brom
authors.forename: P W
authors.initials: PW
authors.lastname: Blom
authors.forename: J N
authors.initials: JN
authors.lastname: Huiberts