Listar por autoría "ba522666-0f76-4b4d-b64d-8bb771ce9327"
Mostrando ítems 1-20 de 21
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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, M. E.; 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, ... -
Effect of the bridge substitution on the efficiency of dye-sensitized solar cells
González Pedro, Victoria; Barea, Eva M; Langa, Fernando; De la Cruz, Pilar; Pelado, Beatriz Elsevier (2012-12)We have designed and synthesized a novel D–π–A dye based on zinc porphyrin as the donor, cyanoacrylic acid as the acceptor and trans-bis(3,4-ethylenedioxythiophene)vinylene as the bridge. Under standard global AM 1.5 solar ... -
Efficient passivated phthalocyanine-quantum dot solar cells
Blas Ferrando, Vicente M.; Ortiz, Javier; González Pedro, Victoria; S. Sánchez, Rafael; Mora-Sero, Ivan; Fernández Lázaro, Fernando; Sastre Santos, Ángela Royal Society of Chemistry (2014-12-08)The power conversion efficiency of CdSe and CdS quantum dot sensitized solar cells is enhanced by passivation with asymmetrically substituted phthalocyanines. The introduction of the phthalocyanine dye increases the ... -
Enhanced Carrier Transport Distance in Colloidal PbS Quantum-Dot-Based Solar Cells Using ZnO Nanowires
Wang, Haibin; González Pedro, Victoria; Kubo, Takaya; Fabregat-Santiago, Francisco; Bisquert, Juan; Sanehira, Yoshitaka American Chemical Society (2015-11)Nanostructured solar cells are a promising area of research for the production of low cost devices that may eventually be capable of complementing or even replacing present technologies in the field of solar power ... -
General Working Principles of CH3NH3PbX3 Perovskite Solar Cells
González Pedro, Victoria; Juarez-Perez, Emilio J.; Arsyad, Waode Sukmawati; Barea, Eva M; Fabregat-Santiago, Francisco; Mora-Sero, Ivan; Bisquert, Juan American Chemical Society (2014)Organometal halide perovskite-based solar cells have recently realized large conversion efficiency over 15% showing great promise for a new large scale cost-competitive photovoltaic technology. Using impedance spectroscopy ... -
Harnessing infrared photons for photoelectrochemical hydrogen generation. A PbS quantum dot based "quasi-artificial leaf"
Trevisan, Roberto; Rodenas, Pau; González Pedro, Victoria; Sima, Cornelia; S. Sánchez, Rafael; Barea, Eva M; Mora-Sero, Ivan; Fabregat-Santiago, Francisco; Gimenez, Sixto American Chemical Society (2013)Hydrogen generation by using quantum dot (QD) based heterostructures has emerged as a promising strategy to develop artificial photosynthesis devices. In the present study, we sensitize mesoporous TiO2 electrodes with ... -
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 ... -
Impedance spectroscopic analysis of high-performance dye sensitized solar cells based on nano-clay electrolytes
González Pedro, Victoria; Sakurai, Hideki; Tomita, Mitsuru; Ito, Bruno Ieri; Fabregat-Santiago, Francisco; Uchida, Satoshi; Segawa, Hiroshi Elsevier (2016)In this work we present quasi-solid state dye-sensitized solar cells obtained employing artificial hydrotalcite nano-clay as electrolyte additive, with a greatly improved photo-energy conversion efficiency of up to 10.9% ... -
Interfacial engineering of quantum dot-sensitized TiO2 fibrous electrodes for futuristic photoanodes in photovoltaic applications
Sudhagar, P.; González Pedro, Victoria; Mora-Sero, Ivan; Fabregat-Santiago, Francisco; Bisquert, Juan; Kang, Yong Soo Royal Society of Chemistry (2012)Herein we report generic surface treatment approaches to improve the electronic interfaces of quantum dot-sensitized TiO2 fiber electrodes, thereby promoting their photoanode performance. Highly dense, continuous and ... -
Mechanism of carrier accumulation in perovskite thin-absorber solar cells
Mora-Sero, Ivan; González Pedro, Victoria; Fabregat-Santiago, Francisco; Juarez-Perez, Emilio J.; Kim, Hui-Seon; Park, Nam-Gyu; Bisquert, Juan Nature Publishing Group (2013)Photovoltaic conversion requires two successive steps: accumulation of a photogenerated charge and charge separation. Determination of how and where charge accumulation is attained and how this accumulation can be identified ... -
Organo-metal halide perovskite-based solar cells with CuSCN as the inorganic hole selective contact
Chavhan, Sudam; Miguel, Óscar; Grande, Hans-Jurgen; González Pedro, Victoria; S. Sánchez, Rafael; Barea, Eva M; Mora-Sero, Ivan; Tena-Zaera, Ramón Royal Society of Chemistry (2014-06)CuSCN is proposed as a cost-competitive hole selective contact for the emerging organo-metal halide perovskite-based solar cells. The CuSCN films have been deposited by a solution casting technique, which has proven to be ... -
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 ... -
Panchromatic Solar-to-H2 Conversion by a Hybrid Quantum Dots-Dye Dual Absorber Tandem Device
González Pedro, Victoria; Zarazúa, Isaac; Barea, Eva M; Fabregat-Santiago, Francisco; Rosa, Elder de la; Mora-Sero, Ivan; Gimenez, Sixto American Chemical Society (2014-01)Solution-processed mesoscopic oxide semiconductor-based materials offer potentially low-cost and high stability alternative for next generation of water to hydrogen conversion photoelectrochemical cells (PEC). In the present ... -
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; Gimenez, 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 ... -
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 ... -
Selective contacts drive charge extraction in quantum dot solids via asymmetry in carrier transfer kinetics
Mora-Sero, Ivan; González Pedro, Victoria; Gimenez, Sixto; Bertoluzzi, Luca; Fabregat-Santiago, Francisco; Kemp, Kyle W.; Sargent, Edward H.; Bisquert, Juan Nature Publishing Group (2013)Colloidal quantum dot solar cells achieve spectrally selective optical absorption in a thin layer of solution-processed, size-effect tuned, nanoparticles. The best devices built to date have relied heavily on drift-based ... -
Slow dynamic processes in lead halide perovskite solar cells. Characteristic times and hysteresis
S. Sánchez, Rafael; González Pedro, Victoria; Lee, Jin Wook; Park, Nam-Gyu; Kang, Yong Soo; Mora-Sero, Ivan; Bisquert, Juan American Chemical Society (2014-06)Characteristic times of perovskite solar cells (PSCs) have been measured by different techniques: transient photovoltage decay, transient photoluminescence, and impedance spectroscopy. A slow dynamic process is detected ... -
Synergistic Interaction of Dyes and Semiconductor Quantum Dots for Advanced Cascade Cosensitized Solar Cells
Blas Ferrando, Vicente M.; Ortiz, Javier; González Pedro, Victoria; S. Sánchez, Rafael; Mora-Sero, Ivan; Fernández Lázaro, Fernando; Sastre Santos, Ángela Wiley (2015-06-03)A new procedure for the cosensitization with quantum dots (QDs) and dyes for sensitized solar cells is reported here. Cascade cosensitization of TiO2 electrodes is obtained by the sensitization with CdS QDs and zinc ... -
Temperature Effects on the Photovoltaic Performance of Planar Structure Perovskite Solar Cells
Cojocaru, Ludmila; Uchida, Satoshi; Sanehira, Yoshitaka; González Pedro, Victoria; Bisquert, Juan; Nakazaki, Jotaro; Kubo, Takaya; Segawa, Hiroshi Chemical Society of Japan (2015-09-10)Temperature effects of CH3NH3PbI3 perovskite solar cells having simple planar architecture were investigated on the crystal structure and photovoltaic performance. The obvious changes in the CH3NH3PbI3 crystal structure ...