Generalized balance equations for charged particle transport via localized and delocalized states: mobility, generalized Einstein relations, and fractional transport

Stokes, Peter W., Philippa, Bronson, Cocks, Daniel, and White, Ronald D. (2017) Generalized balance equations for charged particle transport via localized and delocalized states: mobility, generalized Einstein relations, and fractional transport. Physical Review E (statistical, nonlinear, biological, and soft matter physics), 95 (4). 042119.

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Abstract

A generalized phase-space kinetic Boltzmann equation for highly nonequilibrium charged particle transport via localized and delocalized states is used to develop continuity, momentum, and energy balance equations, accounting explicitly for scattering, trapping and detrapping, and recombination loss processes. Analytic expressions detail the effect of these microscopic processes on mobility and diffusivity. Generalized Einstein relations (GER) are developed that enable the anisotropic nature of diffusion to be determined in terms of the measured field dependence of the mobility. Interesting phenomena such as negative differential conductivity and recombination heating and cooling are shown to arise from recombination loss processes and the localized and delocalized nature of transport. Fractional transport emerges naturally within this framework through the appropriate choice of divergentmean waiting time distributions for localized states, and fractional generalizations of the GER and mobility are presented. Signature impacts on time-of-flight current transients of recombination loss processes via both localized and delocalized states are presented.

Item ID: 50449
Item Type: Article (Research - C1)
ISSN: 2470-0053
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A version of this publication was included as Chapter 5 of the following PhD thesis: Stokes, Peter (2018) Anomalous charged-particle transport in organic and soft-condensed matter. PhD thesis, James Cook University, which is available Open Access in ResearchOnline@JCU. Please see the Related URLs for access.

Funders: Australian Research Council (ARC)
Projects and Grants: Australian Government Research Training Program Scholarship
Date Deposited: 20 Sep 2017 09:11
FoR Codes: 02 PHYSICAL SCIENCES > 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics > 020201 Atomic and Molecular Physics @ 60%
02 PHYSICAL SCIENCES > 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics > 020204 Plasma Physics; Fusion Plasmas; Electrical Discharges @ 40%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 100%
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