Listar FCA_Articles por autoría "db9b523a-3159-45e8-830e-7674c4d93501"
Mostrando ítems 1-13 de 13
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Design and characterization of alkoxy-wrapped push–pull porphyrins for dye-sensitized solar cells
Ripollés Sanchis, Teresa; Guo, Bo-Cheng; Wu, Hui-Ping; Pan, Tsung-Yu; Lee, Hsuan-Wei; Raga, Sonia R.; Fabregat-Santiago, Francisco; Bisquert, Juan; Yeh, Chen-Yu; Wei-Guang Diau, Eric The Royal Society of Chemistry (2012-03-09)Three alkoxy-wrapped push–pull porphyrins were designed and synthesized for dye-sensitized solar cell (DSSC) applications. Spectral, electrochemical, photovoltaic and electrochemical impedance spectroscopy properties of ... -
Diffusion-Recombination Determines Collected Current and Voltage in Polymer:Fullerene Solar Cells
Ripollés Sanchis, Teresa; Guerrero, Antonio; Bisquert, Juan; Garcia-Belmonte, Germà American Chemical Society (2012)The basic operating mechanisms of organic bulk-heterojunction cells comprising poly(3-hexylthiophene (P3HT): [6,6]-phenyl-C 61-butyric acid methyl ester (PCBM) blends are examined based on the selection of diverse materials ... -
Electrodeposited NiO anode interlayers: Enhancement of the charge carrier selectivity in organic solar cells
Ripollés Sanchis, Teresa; Guerrero, Antonio; Azaceta, Eneko; Tena-Zaera, Ramón; Garcia-Belmonte, Germà Elsevier (2013-10)Nickel oxide (NiO) thin films prepared by cathodic electrodeposition exhibit superior electrical performace than PEDOT:PSS when used as anode interlayers of bulk-heterojunction solar cells. Devices incorporating 30 nm-thick ... -
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 ... -
Interplay Between Fullerene Surface Coverage and Contact Selectivity of Cathode Interfaces in Organic Solar Cells
Guerrero, Antonio; Dörling, Bernhard; Ripollés Sanchis, Teresa; Aghamohammadi, Mahdieh; Barrena, Esther; Campoy-Quiles, Mariano; Garcia-Belmonte, Germà ACS Publications (2013-04)Interfaces play a determining role in establishing the degree of carrier selectivity at outer contacts in organic solar cells. Considering that the bulk heterojunction consists of a blend of electron donor and acceptor ... -
Molecular Electronic Coupling Controls Charge Recombination Kinetics in Organic Solar Cells of Low Bandgap Diketopyrrolopyrrole, Carbazole, and Thiophene Polymers
Ripollés Sanchis, Teresa; Raga, Sonia R.; Guerrero, Antonio; Welker, Matthias; Turbiez, Mathieu; Bisquert, Juan; Garcia-Belmonte, Germà American Chemical Society (2013)Low-bandgap diketopyrrolopyrrole- and carbazole-based polymer bulk-heterojunction, solar cells exhibit much faster charge carrier recombination kinetics than that encountered for less-recombining poly(3-hexylthiophene). ... -
Nanoscale mapping by electron energy-loss spectroscopy reveals evolution of organic solar cell contact selectivity
Guerrero, Antonio; Pfannmöller, Martin; Kovalenko, Alexander; Ripollés Sanchis, Teresa; Heidari, Hamed; Bals, Sara; Kaufmann, Louis-Dominique; Bisquert, Juan; Garcia-Belmonte, Germà Elsevier (2015)Organic photovoltaic (OPV) devices are on the verge of commercialization being long-term stability a key challenge. Morphology evolution during lifetime has been suggested to be one of the main pathways accounting for ... -
Origin of efficiency enhancement in Nb2O5 coated titanium dioxide nanorod based dye sensitized solar cells
Barea, Eva M; XU, XUEQING; González Pedro, Victoria; Ripollés Sanchis, Teresa; Fabregat-Santiago, Francisco; Bisquert, Juan Royal Society of Chemistry (2011-05-13)Ordered one-dimensional metal oxides are considered promising architectures for dye-sensitized solar cells (DSC). Here we explore the properties determining the photovoltaic performance of DSC based on titanium dioxide ... -
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 ... -
Porphyrin Dyes with High Injection and Low Recombination for Highly Efficient Mesoscopic Dye-Sensitized Solar Cells
Barea, Eva M; González Pedro, Victoria; Ripollés Sanchis, Teresa; Wu, Hui-Ping; Li, Lu-Lin; Yeh, Chen-Yu; Wei-Guang Diau, Eric; Bisquert, Juan ACS (2011-05)The photovoltaic performance and charge recombination characteristics of porphyrin-based dye-sensitized solar cell (DSC) devices have been investigated using the impedance spectroscopy (IS) technique. The IS results provide ... -
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 ... -
Shelf Life Degradation of Bulk Heterojunction Solar Cells: Intrinsic Evolution of Charge Transfer Complex
Guerrero, Antonio; Heidari, Hamed; Ripollés Sanchis, Teresa; Kovalenko, Alexander; Pfannmöller, Martin; Bals, Sara; Kaufmann, Louis-Dominique; Bisquert, Juan; Garcia-Belmonte, Germà Wiley (2015)Achievement of long-term stability of organic photovoltaics is currently one of the major topics for this technology to reach maturity. Most of the techniques used to reveal degradation pathways are destructive and/or do ... -
Substitution of a hydroxamic acid anchor into the MK-2 dye for enhanced photovoltaic performance and water stability in a DSSC
Koenigsmann, C.; Ripollés Sanchis, Teresa; Brennan, B. J.; Negre, C. F. A.; Koepf, M.; Durrell, A. C.; Milot, R. L.; Torre, J. A.; Crabtree, Robert H.; Batista, V. S.; Brudvig, Gary W.; Bisquert, Juan; Schmuttenmaer, C. A. Royal Society of Chemistry (2014)An efficient synthetic protocol to functionalize the cyanoacrylic acid anchoring group of commercially available MK-2 dye with a highly water-stable hydroxamate anchoring group is described. Extensive characterization ...