Listar por autoría "b29827f1-303e-46f7-89f8-5db8564c930b"
Mostrando ítems 1-11 de 11
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Carrier recombination losses in inverted polymer: Fullerene solar cells with ZnO hole-blocking layer from transient photovoltage and impedance spectroscopy techniques.
Garcia-Belmonte, Germà; Pérez Boix, Pablo; Ajuria, Jon; Palacios, Roberto © 2011 American Institute of Physics (2011-04)In this study, full coincidence between impedance spectroscopy and transient photovoltage techniques in measuring recombination kinetics of photogenerated charge carriers in inverted polymer:fullerene organic solar cells ... -
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 ... -
Determination of gap defect states in organic bulk heterojunction solar cells from capacitance measurements
Pérez Boix, Pablo; Garcia-Belmonte, Germà; Muñecas, Udane; Neophytou, Marios; Waldauf, Christoph; Pacios, Roberto 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 ... -
Effect of nanostructured electrode architecture and semiconductor deposition strategy on the photovoltaic performance of quantum dot sensitized solar cells
Samadpour, Mahmoud; Giménez Juliá, Sixto; Pérez Boix, Pablo; Shen, Qing; Calvo, Mauricio E.; Taghavinia, Nima; Iraji Zad, Azam; toyoda, taro; Míguez, Hernán; Mora-Sero, Ivan Elsevier (2012)Here we analyze the effect of two relevant aspects related to cell preparation on quantum dot sensitized solar cells (QDSCs) performance: the architecture of the TiO2 nanostructured electrode and the growth method of quantum ... -
Fluorine Treatment of TiO2 for Enhancing Quantum Dot Sensitized Solar Cell Performance
Samadpour, Mahmoud; Pérez Boix, Pablo; Giménez Juliá, Sixto; Iraji Zad, Azam; Taghavinia, Nima; Mora-Sero, Ivan; Bisquert, Juan ACS (2011-06)Surface treatments of TiO2 nanostructure in semiconductor quantum dot sensitized solar cells (QDSCs) aimed to increase the photovoltaic conversion efficiencies of the solar cells are analyzed. A fluorine treatment, with ... -
Impedance spectroscopy characterisation of highly efficient silicon solar cells under different light illumination intensities
Mora-Sero, Ivan; Garcia-Belmonte, Germà; Pérez Boix, Pablo; Vázquez, Miguel A.; Bisquert, Juan Royal Society of Chemistry (2009)Highly efficient silicon solar cells have been characterised by impedance spectroscopy and current–potential characteristic in the dark and with different illumination intensities. For each illumination the impedance ... -
Open-Circuit Voltage Limitation in Low-Bandgap Diketopyrrolopyrrole-Based Polymer Solar Cells Processed from Different Solvents
Pérez Boix, Pablo; Wienk, Martijn M.; Janssen, René A. J.; Garcia-Belmonte, Germà ACS (2011-06)Low-bandgap diketopyrrolopyrrole-based polymer bulk-heterojunction solar cells prepared from different solvents are studied by means of capacitance measurements. Large variations of both photovoltage and photocurrent are ... -
PEDOT nanotube arrays as high performing counter electrodes for dye sensitized solar cells: study of the interactions among electrolytes and counter electrodes
Trevisan, Roberto; Döbbelin, Markus; Pérez Boix, Pablo; Barea, Eva M; Tena-Zaera, Ramón; Mora-Sero, Ivan; Bisquert, Juan Wiley (2011-10)PEDOT nanotube arrays present a better catalytic activity with I−/I3− redox than standard platinized counter electrodes used for dye sensitized solar cells exhibiting thereby a photoconversion efficiency as high as 8.3%. ... -
Photoanodes Based on Nanostructured WO3 for Water Splitting
Tacca, Alessandra; Meda, Laura; Marra, Gianluigi; Savoini, Alberto; Caramori, Stefano; Cristino, Vito; Bignozzi, Carlo Alberto; González Pedro, Victoria; Pérez Boix, Pablo; Giménez Juliá, Sixto; Bisquert, Juan Wiley (2012-08)Anodically grown WO3 photoelectrodes prepared in an N-methylformamide (NMF) electrolyte have been investigated with the aim of exploring the effects induced by anodization time and water concentration in the electrochemical ... -
Series resistance in organic bulk-heterojunction solar devices: Modulating carrier transport with fullerene electron traps
Guerrero, Antonio; Ripollés Sanchis, Teresa; Pérez Boix, Pablo; Garcia-Belmonte, Germà Elsevier (2012)Series resistance is one of the key parameters affecting the performance of organic photovoltaic devices. Several electronic mechanisms arising from different structures within the solar cell can contribute to increasing ... -
Simultaneous determination of carrier lifetime and electron density-of-states in P3HT:PCBM organic solar cells under illumination by impedance spectroscopy
Garcia-Belmonte, Germà; Pérez Boix, Pablo; Bisquert, Juan; Sessolo, Michele; Bolink, Henk J. Elsevier (2010)We report new insights into recombination kinetics in poly(3-hexylthiophene):methanofullerene (P3HT:PCBM) bulk heterojunction (BHJ) solar cells, based on simultaneous determination of the density of states (DOS), internal ...