Charge transport in π-conjugated polymers from extraction current transients

G. Juška, K. Arlauskas, M. Viliunas, K. Genevičius, R. Österbacka, H. Stubb

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148 Citations (Scopus)

Abstract

The transport properties, namely mobility, conductivity, and charge carrier concentration of three model polymers, regioregular poly(3-hexylthiophene) (RRPHT), poly(p-phenylene vinylene) (PPV), and a polyazomethine (PAM) are investigated by charge extraction in a linearly increasing voltage. We have numerically modeled the charge cartier transients including a Gaussian distribution of localized states and the typical Poole-Frenkel-type field-dependent mobility observed in these materials, and good agreement with measured values is obtained. From our calculation we can determine the reason for the field-dependent mobility, and we found that the field-dependent release time from the localized states, τR is very important in RRPHT and PPV, while PAM is governed by stochastic transport.

Original languageEnglish
Article numberR16235
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number24
DOIs
Publication statusPublished - 15 Dec 2000
MoE publication typeA1 Journal article-refereed

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