Temperature dependence of carrier transport in conducting polymers: Similarity to amorphous inorganic semiconductors
- 1 October 2002
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 92 (7), 3835-3838
- https://doi.org/10.1063/1.1506394
Abstract
We improve the trapping model of carrier transport in conducting polymers by integrating the coupled Poisson and continuity equations numerically. In the case of exponentially distributed traps calculated log J vs 1/T plots are straight lines indicating that the activation of carriers to the extended states can be described by one single activation energy, The improved trapping model agrees well with the recent experimental data at high temperatures (i.e., near room temperature). At low temperatures the trapping model does not work since the available thermal energy is not sufficient to ionize the traps. We use the hopping mobility model at low temperatures. The model explains the low-temperature J–V characteristics well. This mechanism of charge carrier transport is similar to that used for interpreting experiments on inorganic amorphous materials.
Keywords
This publication has 14 references indexed in Scilit:
- Injection- and space charge limited-currents in doped conducting organic materialsJournal of Applied Physics, 2001
- Bulk limited conduction in electroluminescent polymer devicesJournal of Applied Physics, 1998
- Device model investigation of single layer organic light emitting diodesJournal of Applied Physics, 1998
- Electric-field and temperature dependence of the hole mobility in poly(p-phenylene vinylene)Physical Review B, 1997
- Charge Transport in Disordered Organic Photoconductors a Monte Carlo Simulation StudyPhysica Status Solidi (b), 1993
- Poole−Frenkel conduction and the neutral trapJournal of Applied Physics, 1975
- Drift mobilities in amorphous charge-transfer complexes of trinitrofluorenone and poly-n-vinylcarbazoleJournal of Applied Physics, 1972
- Screening effects on Poole‐Frenkel conduction in amorphous solidsPhysica Status Solidi (b), 1972
- Electronic Transport in Amorphous Silicon FilmsPhysical Review Letters, 1970
- Transient Photoconductivity in Poly(N-vinylcarbazole)The Journal of Chemical Physics, 1970