Journal ArticleDOI
Transient Photoconductivity in Poly(N‐vinylcarbazole)
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TLDR
In this article, the authors studied the transport of holes through thin films of polyvinylcarbazole using transient photoconductivity techniques and showed that the photogeneration depends on the electric field with quantum efficiency approaching a value of 0.1 at an applied electric field of 108 V/m.Abstract:
Transport of holes through thin films of poly(N‐vinylcarbazole) was studied using transient photoconductivity techniques. The photogeneration depends on the electric field with quantum efficiency of generation approaching a value of 0.1 at an applied electric field of 108 V/m. The motion of carriers cannot be characterized by a drift mobility but can be fully represented by an “effective transit time” given by (Teff)−1 = (mτ0)−1exp(γE1/2 − e0 / kT), where m = d / d0 (d being the thickness of the film and d0 a characteristic length), τ0 is a characteristic release time from a localized state, E is the applied electric field, e0 is an activation energy, k is the Boltzmann constant, and T is the absolute temperature. This relationship suggests a model in which holes jump from one localized state to the next one, the “effective transit time” being the sum of release times from the localized states. Bulk trapping occurs at low fields, and the release from these traps depends on both temperature and electric field.read more
Citations
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Journal ArticleDOI
Charge transport in organic semiconductors.
Veaceslav Coropceanu,Jérôme Cornil,Demetrio A. da Silva Filho,Yoann Olivier,Robert J. Silbey,Jean-Luc Brédas +5 more
TL;DR: Electronic Coupling in Oligoacene Derivatives: Factors Influencing Charge Mobility, and the Energy-Splitting-in-Dimer Method 3.1.
Journal ArticleDOI
Drift mobilities in amorphous charge‐transfer complexes of trinitrofluorenone and poly‐n‐vinylcarbazole
TL;DR: In this article, the authors measured hole and electron drift mobilities in thin films of charge transfer complexes of 2,4,7,trinitro-9-fluorenone (TNF) with poly n-vinyl carbazole (PVK).
Journal ArticleDOI
Charge-carrier concentration dependence of the hopping mobility in organic materials with Gaussian disorder
R Reinder Coehoorn,R Reinder Coehoorn,Willem Franke Pasveer,PA Peter Bobbert,M. A. J. Michels +4 more
TL;DR: In this article, it was shown that the hopping mobility in semiconducting organic materials depends on the charge-carrier concentration, and that the mobility is constant below a certain concentration, which decreases with increasing ratio.
Journal ArticleDOI
Temperature- and field-dependent electron and hole mobilities in polymer light-emitting diodes
TL;DR: In this paper, the transport properties of electron and hole-dominated MEH-PPV, poly(2-methoxy,5-(2′-ethyl-hexoxy)-p-phenylene vinylene), devices in the trap-free limit were derived from the temperature-dependent electron and holes mobilities.
Journal ArticleDOI
Charge transport in poly(p-phenylene vinylene) light-emitting diodes
TL;DR: In this paper, a device model for PLEDs is proposed in which the light generation is due to bimolecular recombination between the injected electrons and holes, which gives rise to a bias dependent efficiency.
References
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Introduction to solid state physics
TL;DR: In this article, the Hartree-Fock Approximation of many-body techniques and the Electron Gas Polarons and Electron-phonon Interaction are discussed.