Time-of-flight measurements on a wide variety of molecularly-doped polymers reveal carrier mobilities that exhibit an exponential dependence on the square root of the applied electric field. Recent attempts to explain the observed field dependence have focused on the role played by spatial and energetic disorder. It as also been conjectured that the charge-dipole interactions often identified as the source of energetic disorder could be of sufficient range to lead to correlations in the energies of neighboring hopping sites. We have analytically explored the effect of such correlations on high field carrier transport in random potentials, and discuss how particular features of the correlations associated with charge-dipole interactions might lead to behavior similar to that seen in experiment.

Meeting Name

Organic Photorefractive Materials and Xerographic Photoreceptors (1996: Aug. 7-8, Denver, CO)



Keywords and Phrases

Carrier mobility; Charge dipole interactions; Energetic disorder; Molecularly-doped polymers; Time-of-flight measurements; Doping (additives); Electric field effects; Mathematical models; Order disorder transitions; Organic polymers; Transport properties; Xerography

International Standard Book Number (ISBN)

081942238X; 9780819422385

International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version

Accepted Manuscript

File Type





© 1996 SPIE--The International Society for Optical Engineering, All rights reserved.

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