Abstract
We present a new technique to determine the carrier mobility 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( -phenylene vinylene). We demonstrate that locally can be as high as , and deduce the typical hopping parameters in the mesoscopic high- regions in the material.
- Received 18 December 2000
DOI:https://doi.org/10.1103/PhysRevLett.87.086601
©2001 American Physical Society