https://doi.org/10.1140/epje/i2004-10060-x
Influence of ambient atmosphere on charge transport in polycrystalline thin films of three simple aromatic hydrocarbons
1
Institute of Physics, Technical University of Łódż, Wólczańska 219, 93-009, Łódż, Poland
2
Center of Mathematics and Physics, Technical University of Łódż, Łódż, Poland
* e-mail: skania@mail.p.lodz.pl
Received:
10
April
2004
Accepted:
16
October
2004
Published online:
6
December
2004
Drift mobility of charge carriers in p-terphenyl, p-quaterphenyl and tetracene polycrystalline thin films was measured using the classical time-of-flight method. The measurements were carried out both in the atmosphere and in vacuum of the order of 10 - 3 Torr. The mobility measured in the atmosphere is of the order of 10 -4 cm 2 V -1 s -1 and turns out to be about 1 order of magnitude higher than that measured in vacuum. It is suggested that the hopping transport of charge dominates in the structures investigated. The increase in the mobility for the measurements in the atmosphere probably results from the additional localized states due to water and other atmosphere molecules.
PACS: 72.80.Le Polymers; organic compounds (including organic semiconductors) – / 73.61.Ph Polymers; organic compounds – / 72.20.Jv Charge carriers: generation, recombination, lifetime, and trapping –
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2005
