<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Charge Transport in Disordered Materials"^^ . "This thesis is focused on on using Monte Carlo simulation to extract device relevant properties, such as the current voltage behavior of transistors and the efficiency of photovoltaics, from the hopping transport of molecules.\r\nSpecifically, simulation is used to study organic field-effect transistors (OFETs) and organic photovoltaics (OPVs).\r\nFor OFETs, the current was found to decrease with increasing concentration of traps and barriers in the system.\r\nAs the barrier/trap concentration approaches 100%, the current recovers as carrier begin to travel through the manifold of connected trap states.\r\nCoulomb interactions between like charges are found to play a role in removing carriers from trap states.\r\nThe equilibrium current in OFETs was found to be independent of charge injection method, however, the finite size of devices leads to an oscillatory current.\r\nFourier transforms of the electrical current show peaks that vary non-linearly with device length, while being independent of device width.\r\nThis has implications for the mobility of carriers in finite sized devices.\r\nLastly, the presence of defects and high barriers (> 0.4 eV) was found to produce negative differential resistance in the saturation region of OFET curves, unlike traps.\r\nWhile defects and barriers prohibit carriers from reaching the drain at high voltages, the repulsive interaction between like charged carriers pushes charges around the defects.\r\nFor OPVs, the effects of device morphology and charge delocalization were studied.\r\nFill factors increased with domain size in monolayer isotropic morphologies, but decreased for band morphologies.\r\nIn single-phase systems without Coulomb interactions, astonishingly high fill factors (70%) were found.\r\nIn multilayer OPVs,a complex interplay of domain size, connectivity, tortuosity, interface trapping, and delocalization determined efficiency."^^ . "2014-01-30" . . . . . . . . "Adam"^^ . "Gagorik"^^ . "Adam Gagorik"^^ . . . . . . "Charge Transport in Disordered Materials (PDF)"^^ . . . . . . . . . "AdamGagorikThesis.pdf"^^ . . . "Charge Transport in Disordered Materials (Indexer Terms)"^^ . . . . . . "indexcodes.txt"^^ . . . "Charge Transport in Disordered Materials (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Charge Transport in Disordered Materials (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Charge Transport in Disordered Materials (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Charge Transport in Disordered Materials (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #20205 \n\nCharge Transport in Disordered Materials\n\n" . "text/html" . .