1. Charge transport in disordered semiconducting polymers driven by nuclear tunneling
- Author
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Ilias Katsouras, L. J. A. Koster, N. J. van der Kaap, Kamal Asadi, Dago M. de Leeuw, Paul W. M. Blom, and Photophysics and OptoElectronics
- Subjects
ORGANIC SEMICONDUCTORS ,Field (physics) ,PREDICTION ,HOL - Holst ,Semiclassical physics ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Power law ,PARAMETERS ,Electric field ,TEMPERATURE ,Quantum tunnelling ,Physics ,TS - Technical Sciences ,Range (particle radiation) ,Industrial Innovation ,Condensed matter physics ,Charge (physics) ,EXTERNAL ELECTRIC-FIELD ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,MODEL ,Organic semiconductor ,MOBILITY ,SIMULATION ,Nano Technology ,Electronics ,0210 nano-technology ,HIGH CARRIER DENSITY ,SYSTEM - Abstract
The current density-voltage (J-V) characteristics of hole-only diodes based on poly(2-methoxy, 5-(2′ ethyl-hexyloxy)-p-phenylene vinylene) (MEH-PPV) were measured at a wide temperature and field range. At high electric fields the temperature dependence of the transport vanishes, and all J-V sweeps converge to a power law. Nuclear tunneling theory predicts a power law at high fields that scales with the Kondo parameter. To model the J-V characteristics we have performed master-equation calculations to determine the dependence of charge carrier mobility on electric field, charge carrier density, temperature, and Kondo parameter, using nuclear tunneling transfer rates. We demonstrate that nuclear tunneling, unlike other semiclassical models, provides a consistent description of the charge transport for a large bias, temperature, and carrier density range. cop. 2016 authors. Published by the American Physical Society.
- Published
- 2016