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arXiv · 1507.01788

Finite-Size Scaling of Charge Carrier Mobility in Disordered Organic Semiconductors

Pascal Kordt·Thomas Speck·Denis Andrienko
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Abstract

Simulations of charge transport in amorphous semiconductors are often performed in microscopically sized systems. As a result, charge carrier mobilities become system-size dependent. We propose a simple method for extrapolating a macroscopic, nondispersive mobility from the system-size dependence of a microscopic one. The method is validated against a temperature-based extrapolation [Phys. Rev. B 82, 193202 (2010)]. In addition, we provide an analytic estimate of system sizes required to perform nondispersive charge transport simulations in systems with finite charge carrier density, derived from a truncated Gaussian distribution. This estimate is not limited to lattice models or specific rate expressions.

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Pascal Kordt, Thomas Speck, Denis Andrienko. 2015-07-07. Finite-Size Scaling of Charge Carrier Mobility in Disordered Organic Semiconductors. https://doi.org/10.1103/physrevb.94.014208

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