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Phys. Rev. Lett. 80, 3819 - 3822 (1998)

Dispersive Hole Transport in Poly( p-Phenylene Vinylene)

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P. W. M. Blom1 * and M. C. J. M. Vissenberg1,2
1Philips Research Laboratories, Professor Holstlaan 4, 5656 AA Eindhoven, The Netherlands
2Instituut-Lorentz, University of Leiden, 2300 RA Leiden, The Netherlands

Received 21 November 1997

The transient hole transport in poly( p-phenylene vinylene) (PPV) is investigated by measuring the response times of PPV-based light-emitting diodes. It is demonstrated that the observed response times are governed by the dispersive transport of holes in PPV. In terms of the stochastic transport model of Scher and Montroll, the results correspond to a dispersion parameter α  =  0.45, independent of temperature. This indicates that the dispersion in hole transport in PPV is due mainly to structural disorder, rather than to energetic disorder.


©1998 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.80.3819
DOI: 10.1103/PhysRevLett.80.3819
PACS: 72.80.Le, 73.61.Ph, 85.60.Jb

* Electronic address: blom@natlab.research.philips.com

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