Phys. Rev. Lett. 80, 3819–3822 (1998)Dispersive Hole Transport in Poly( p-Phenylene Vinylene)Received 21 November 1997; published in the issue dated 27 April 1998 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
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