Hopping charge transport in disordered organic materials: where is the disorder?

S. V. Novikov; A. V. Vannikov

Hopping charge transport in disordered organic materials: where is the disorder?

Disordered Systems and Neural Networks 2008-09-30 v1 Materials Science

Authors: S. V. Novikov , A. V. Vannikov

Abstract

Effect of energetic disorder on charge carrier transport in organic materials has been reexamined. A reliable method for mobility calculation and subsequent evaluation of relevant disorder parameters has been discussed. This method is well suited for a direct calculation of the magnitude of dipolar disorder $\sigma_\textrm{dip}$ in polar organic materials from the current transients. Calculation of $\sigma_\textrm{dip}$ for several transport materials with varying concentration of polar dopants gives concentration dependences that are in reasonable agreement with theoretical predictions. A possible solution of the puzzle concerning the disorder effect on the mobility temperature dependence has been suggested.

Keywords

hopping charge transport disordered organic materials energetic disorder mobility dipolar disorder current transients

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@article{arxiv.0809.4797,
  title  = {Hopping charge transport in disordered organic materials: where is the disorder?},
  author = {S. V. Novikov and A. V. Vannikov},
  journal= {arXiv preprint arXiv:0809.4797},
  year   = {2008}
}

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21 pages, 6 figures

Hopping charge transport in disordered organic materials: where is the disorder?

Abstract

Keywords

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