ListarFCA_Articles por tema "Capacitance"
Mostrando ítems 1-12 de 12
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Capacitance, spectroelectrochemistry and conductivity of polarons and bipolarons in a polydicarbazole based conducting polymer
Elsevier (2008)The paper discusses the interpretation of electrochemical and spectroelectrochemical measurement of charging and transport of electronic species in conducting polymers, as a function of the polymer potential. The charging ... -
Charge carrier mobility and lifetime of organic bulk heterojunctions analyzed by impedance spectroscopy
Elsevier (2008)Charge carrier diffusion and recombination in an absorber blend of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C<sub>61</sub>-butyric acid methyl ester (PCBM) with indium tin oxide (ITO) and aluminium contacts have been ... -
Determination of gap defect states in organic bulk heterojunction solar cells from capacitance measurements
American Institute of Physics (2009)Energy distributions [density-of-states (DOS)] of defects in the effective band gap of organic bulk heterojunctions are determined by means of capacitance methods. The technique consists of calculating the junction capacitance ... -
Hole conductivity and acceptor density of p-type CuGaO2 nanoparticles determined by impedance spectroscopy: The effect of Mg doping
Elsevier (2013)Delafossite materials like CuGaO2 have appeared as promising p-type semiconductor materials for their exploitation in tandem dye sensitized solar cells and water splitting photoelectrochemical cells. However, the intrinsic ... -
Kinetics of interface state-limited hole injection in α-naphthylphenylbiphenyl diamine (α-NPD) thin layers
Elsevier (2009)Injection-limited operation is identified in thin-film, α-NPD-based diodes. A detailed model for the impedance of the injection process is provided which considers the kinetics of filling/releasing of interface states as ... -
Kinetics of occupancy of defect states in poly(3-hexylthiophene): fullerene solar cells
Elsevier (2012-01)Energetics and kinetics of defects in the effective band gap of organic bulk heterojunctions are determined by means of capacitance methods. The technique consists of calculating the junction capacitance derivative with ... -
Oxygen doping-induced photogeneration loss in P3HT:PCBM solar cells
Elsevier (2012-05)This work investigates the loss in performance induced by molecular oxygen in bulk heterojunction solar cells. We observe that upon exposure to molecular oxygen both formation of P3HT+:O2− complex and metal oxidation at ... -
Predicting thermal stability of organic solar cells through an easy and fast capacitance measurement
Elsevier (2015-10)Degradation of organic photovoltaic (OPV) devices is currently a topic under intense research as it is one of the main limitations towards the commercialization of this technology. Morphological changes at both active layer ... -
Theory of Impedance and Capacitance Spectroscopy of Solar Cells with Dielectric Relaxation, Drift-Diffusion Transport, and Recombination
American Chemical Society (2014-07)Semiconductor photovoltaic devices currently investigated, such as hybrid organic–inorganic lead halide perovskite based solar cells, have shown a high dielectric polarization combined with ambipolar carrier transport. In ... -
Theory of Impedance Spectroscopy of Ambipolar Solar Cells with Trap-Mediated Recombination
American Chemical Society (2014-01)The analysis of recombination in solar cells suggests in many cases the presence of trap-mediated recombination in the absorber. We present a theory of the recombination of electrons and holes, the Shockley–Read–Hall model, ... -
Trap origin of field-dependent mobility of the carrier transport in organic layers
Elsevier (2011)In the measurements of space-charge limited current (SCLC) transport in disordered organic semiconductors, it is often observed that carriermobility depends on bias voltage. Two continuous models have been applied for the ... -
Trap-limited mobility in space-charge limited current in organic layers
Elsevier (2009)Space-charge limited current transport in organic devices, relevant to the operation of a range of organic optoelectronic devices, is analyzed in the frequency domain. The classical multiple trapping picture with one ...