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Transport električnega naboja v organskih polprevodnikih, simulacija po metodi Monte Carlo = Electric-charge transport in organic semiconductors: a Monte Carlo simulationPavlica, Egon ; Hudej, Robert ; Bratina, GvidoThe electric-charge transport in organic semiconductors is essentially different to the transport in ordered inorganic crystals. The reason is in thelocalization of the energy states, which act as ... charge-carrier transport channels between molecules. Consequently, the determination of the basic transport parameters in organic materials is inherently more involved than in their inorganic counterparts. The analytical methods that are used to describe charge transport in inorganic materials are unsuitable, since they are based on the extended electronic energy structure. We report here on the simulation of charge transport in organic semiconductor thin films. The simulation is based on the Monte Carlo method and describes the charge-carrier transport within the framework of carrier hopping between the sites. We employed a Gaussian energy distribution of the hopping sites with disorder elements. The degree of disorder is characterized by the width of the Gaussian distribution and is measured in eV units. The results of the transport simulation in 3,4,9,10-perylenedianhydride tetracarboxylic acid (PTCDA) show that the photogenerated charge-carrier current depends on the film thickness, temperature and disorder degree. The simulated photocurrents have the same amplitude in thick films as in the thin films, but the overall shape of the I(t) curve is more dispersive in thin films. The charge-carrier mobility decreases with the increasing degree of disorder at a given temperature. The simulation of the photogenerated positive charge carriers current matches with the time-of-flight experiment in a glass/ITO/PTCDA(600 nm)/In heterostructure at room temperature and an applied bias voltage of 8 V.Source: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Vol. 37, no. 5, 2003, str. 225-229)Type of material - article, component part ; adult, seriousPublish date - 2003Language - englishCOBISS.SI-ID - 283643
Author
Pavlica, Egon |
Hudej, Robert |
Bratina, Gvido
Topics
neurejeni kristali |
metoda Monte Carlo |
organski polprevodniki |
transport naboja |
PTCDA |
tranzientne meritve
source: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Vol. 37, no. 5, 2003, str. 225-229)
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Pavlica, Egon | 22305 |
Hudej, Robert | 20657 |
Bratina, Gvido | 06617 |
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