Charge carrier transport in nonpolar disordered organic materials: What is the reason for Poole-Frenkel behavior?статья
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Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
Аннотация:Recently it was found that the mobility field dependence in disordered
organic materials is closely connected with the spatial decay of the
energy correlation function. For example, a dipolar glass products a
correlation function decaying as inverse distance, thus leading to a
well-known Poole-Frenkel (PF) field dependence. From this point of view
a frequent experimental observation of the PF dependence in nonpolar
organic materials cannot be explained. We show that the model of
quadrupolar glass which is suitable to describe transport properties of
nonpolar materials produces a field dependence that is very close to the
PF one if measured in not very wide field range. Dispersive effects
bring this dependence even more close to the PF one.