Visualitza Departament: Física per autoria "279e40c5-23f3-4b0e-b0da-b90ebcd27e0c"
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Current-voltage characteristics of bulk heterojunction organic solar cells: connection between light and dark curves
Pérez Boix, Pablo; Guerrero, Antonio; Marchesi, Luis F.; Garcia-Belmonte, Germà; Bisquert, Juan Wiley (2011-11)A connection is established between recombination and series resistances extracted from impedance spectroscopy and current-voltage curves of polythiophene:fullerene organic solar cells. Recombination is shown to depend ... -
How the Charge-Neutrality Level of Interface States Controls Energy Level Alignment in Cathode Contacts of Organic Bulk-Heterojunction Solar Cells
Garcia-Belmonte, Germà; Bisquert, Juan; Guerrero, Antonio; Ripollés Sanchis, Teresa; Marchesi, Luis F.; Boix, Pablo P; Ruiz Raga, Sonia American Chemical Society (2012-04)Electronic equilibration at the metal–organic interface, leading to equalization of the Fermi levels, is a key process in organic optoelectronic devices. How the energy levels are set across the interface determines carrier ... -
Oxygen doping-induced photogeneration loss in P3HT:PCBM solar cells
Garcia-Belmonte, Germà; Ripollés Sanchis, Teresa; Guerrero, Antonio; Boix, Pablo P; Marchesi, Luis F.; Pereira, Ernesto C. 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 ... -
Recombination in Organic Bulk Heterojunction Solar Cells: Small Dependence of Interfacial Charge Transfer Kinetics on Fullerene Affinity
Guerrero, Antonio; Marchesi, Luis F.; Boix, Pablo P; Bisquert, Juan; Garcia-Belmonte, Germà American Chemical Society (2012)We investigate the causes for obtaining higher open-circuit voltage in solar cells that use a fullerene with a smaller electron affinity. Using impedance spectroscopy technique, we show that the change of fullerene LUMO ...