Time of flight transients in the dipolar glass modelстатья
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Дата последнего поиска статьи во внешних источниках: 26 декабря 2017 г.
Аннотация:Using Monte Carlo simulation we investigated time of flight current transients predicted by the dipolar glass model for a random spatial distribution of hopping centers. Behavior of the carrier drift mobility was studied at room temperature over a broad range of electric field and sample thickness. A flat plateau followed by j proportional to t(-2) current decay is the most common feature of the simulated transients. Poole-Frenkel mobility field dependence was confirmed over 5-200 V/mu m as well as its independence of the sample thickness. Universality of transients with respect to both field and sample thickness has been observed. A simple phenomenological model to describe simulated current transients has been proposed. Simulation results agree well with the reported Poole-Frenkel slope and shape of the transients for a prototype molecularly doped polymer. (C) 2012 Elsevier B.V. All rights reserved.