Listar FCA_Articles por autoría "079d9bc0-018f-4a01-ab75-208841dbfde6"
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Colloidal PbS and PbSeS Quantum Dot Sensitized Solar Cells Prepared by Electrophoretic Deposition
Parsi Benehkohal, Nima; González Pedro, Victoria; Boix, Pablo P; Chavhan, Sudam; Tena-Zaera, Ramón; Demopoulos, George P.; Mora-Sero, Ivan American Chemical Society (2012)Here we report the developement of quantum dot sensitized solar cells (QDSCs) using colloidal PbS and PbSeS QDs and polysulfide electrolyte for high photocurrents. QDSCs have been prepared in a novel sensitizing way employing ... -
Effect of organic and inorganic passivation in quantum-dot-sensitized solar cells
De La Fuente, M. S.; S. Sánchez, Rafael; González Pedro, Victoria; Boix, Pablo P; Mhaisalkar, S. G.; Rincón, Marina; Bisquert, Juan; Mora-Sero, Ivan American Chemical Society (2013)The effect of semiconductor passivation on quantum-dot-sensitized solar cells (QDSCs) has been systematically characterized for CdS and CdS/ZnS. We have found that passivation strongly depends on the passivation agent, ... -
From Flat to Nanostructured Photovoltaics: Balance between Thickness of the Absorber and Charge Screening in Sensitized Solar Cells
Fabregat-Santiago, Francisco; Bisquert, Juan; Mora-Sero, Ivan; Boix, Pablo P; Yong, Hui Lee; Sang, Hyuk Im; Sang, Il Seok American Chemical Society (2012-01)Nanoporous metal oxide electrodes provide a high internal area for dye anchoring in dye-sensitized solar cells, but the thickness required to extinguish the solar photons also enhances recombination at the TiO2/electrolyte ... -
High performing PbS Quantum Dot Sensitized Solar Cells exceeding 4% efficiency: The role of metal precursor in the electron injection and charge separation
González Pedro, Victoria; Sima, Cornelia; Marzari, Gabriela; Boix, Pablo P; Gimenez, Sixto; Qing, Shen; Dittrich, Thomas; Mora-Sero, Ivan Royal Society of Chemistry (2013)Here we report the preparation of high performance Quantum Dot Sensitized Solar Cells (QDSCs) based on PbS–CdS co-sensitized nanoporous TiO2 electrodes. QDs were directly grown on the TiO2 mesostructure by the Successive ... -
Hole Transport and Recombination in All-Solid Sb2S3-Sensitized TiO2 Solar Cells Using CuSCN As Hole Transporter
Boix, Pablo P; Larramona, Gerardo; Jacob, Alain; Delatouche, Bruno; Mora-Sero, Ivan; Bisquert, Juan American Chemical Society (2012)All-solid semiconductor-sensitized solar cells lack models allowing their characterization in terms of the fundamental processes of charge transport and recombination. Nanostructured TiO 2/Sb 2S 3/CuSCN solar cells were ... -
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 ... -
Kinetics of occupancy of defect states in poly(3-hexylthiophene): fullerene solar cells
Garcia-Belmonte, Germà; Boix, Pablo P; Ajuria, Jon; Etxebarria, Ikerne; Palacios, Roberto 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
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 ... -
Photocurrent enhancement in dye-sensitized photovoltaic devices with titania–graphene composite electrodes
Durantini, Javier; Boix, Pablo P; Gervaldo, Miguel; Morales, Gustavo M.; Otero, Luis; Bisquert, Juan; Barea, Eva M Elsevier (2012)Photovoltaic performance of dye-sensitized solar cell (DSC) devices based on a new titania–graphene paste has been investigated using Impedance Spectroscopy (IS) technique. The results provide key information about device ... -
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 ... -
Sb2S3-Sensitized Photoelectrochemical Cells: Open Circuit Voltage Enhancement through the Introduction of Poly-3-hexylthiophene Interlayer
Heo, Jin Hyuck; Im, Sang Hyuk; Kim, Hi-jung; Boix, Pablo P; Lee, Suk Joong; Seok, Sang Il; Mora-Sero, Ivan; Bisquert, Juan American Chemical Society (2012)The Sb2S3-sensitized photoelectrochemical cells (Sb2S3–SPECs) in cobalt electrolyte were fabricated by depositing Sb2S3 on the macroporous TiO2 nanorods electrodes and consecutively spin-coating P3HT (Poly-3-hexylthiophene) ... -
Surface Recombination and Collection Efficiency in Perovskite Solar Cells from Impedance Analysis
Zarazúa, Isaac; Han, Guifang; Boix, Pablo P; Mhaisalkar, Subodh; Fabregat-Santiago, Francisco; Mora-Sero, Ivan; Bisquert, Juan; Garcia-Belmonte, Germà American Chemical Society (2016-11)The large diffusion lengths recurrently measured in perovskite single crystals and films signal small bulk nonradiative recombination flux and locate the dominant carrier recombination processes at the outer interfaces. ... -
Theory of Impedance Spectroscopy of Ambipolar Solar Cells with Trap-Mediated Recombination
Bertoluzzi, Luca; Boix, Pablo P; Mora-Sero, Ivan; Bisquert, Juan 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, ...