Abstract
General properties of the transport of charge carriers (electrons and holes) in disordered organic materials are discussed. It was demonstrated that the dominant part of the total energetic disorder in organic material is usually provided by the electrostatic disorder, generated by randomly located and oriented dipoles and quadrupoles. For this reason this disorder is strongly spatially correlated. Spatial correlation directly governs the field dependence of the carrier drift mobility. Shape of the current transients, which is of primary importance for a correct determination of the carrier mobility, is considered. A notable feature of the electro-static disorder is its modification in the vicinity of the electrode, and this modification takes place without modification of the structure of the material. It is shown how this phenomenon affects characteristics of the charge injection. We consider also effect of inter-charge interaction on charge transport.
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Published in Russian in Elektrokhimiya, 2012, Vol. 48, No. 4, pp. 427–441.
Published on the basis of the materials of the IXth International Frumkin Symposium “Materials and Technologies of Electrochemistry of the XXIst Century” (Moscow, October, 2010).
The article was translated by the authors.
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Novikov, S.V. Hopping charge transport in organic materials. Russ J Electrochem 48, 388–400 (2012). https://doi.org/10.1134/S1023193512030081
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DOI: https://doi.org/10.1134/S1023193512030081