Listar FCA_Articles por fecha de publicación
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Triplication of the photocurrent in dye solar cells by increasing the elongation of the π-conjugation in Zn-porphyrin sensitizers
Wiley-VCH Verlag Berlin (2011)Porphyrins are promising sensitizers for dye solar cells (DSCs) but narrow absorption bands at 400-450 and 500-650 nm limit their light-harvesting properties. Increasing elongation of the π-conjugation and loss of symmetry ... -
Materials for production and storage of renewable energy
American Chemical Society (2011)The need to revolutionize the way energy is produced, delivered, and utilized is widely recognized. Due to an increasing population and rising living standards around the globe, the need for a reliable, convenient, and ... -
Dilemmas of dye-sensitized solar cells
Wiley-VCH Verlag Berlin (2011)Ferrocene to the rescue: The dye-sensitized solar cell allows changes in the energetics of electron transport, molecular absorbers, and hole transport materials to better harvest the energy of solar photons (see picture). ... -
Trap origin of field-dependent mobility of the carrier transport in organic layers
Elsevier (2011)In the measurements of space-charge limited current (SCLC) transport in disordered organic semiconductors, it is often observed that carriermobility depends on bias voltage. Two continuous models have been applied for the ... -
Dispersion requirements in coherent frequency-to-time mapping
Optical Society of America (2011)The frequency-to-time mapping technique (also known as the temporal far-field phenomenon) usually requires a significant amount of dispersion to stretch an ultrashort optical pulse so that the intensity profile becomes ... -
Temperature dependence of open-circuit voltage and recombination processes in polymer–fullerene based solar cells
Elsevier (2011)In this article, we have studied the temperature and illumination dependence of open-circuitvoltage (VOC) in polymer–fullerenebasedsolarcells. It has been observed that VOC at higher illumination intensities gets converged ... -
Linearity, saturation and blocking in a large multiionic channel: divalent cation modulation of the OmpF porin conductance
Elsevier (2011-01)Measurement of unitary conductance is a fundamental step in the characterization of a protein ion channelpermeabilizing a membrane. We study here the effect of salts of divalent cations on the OmpF channelconductance ... -
A variable series resistance mechanism to explain the negative capacitance observed in impedance spectroscopy measurements of nanostructured solar cells
RSC Publishing (2011-01-24)A simple model for conductivity modulation in a recombination diode is discussed to explain the observation of negative capacitance at forward bias observed in many optoelectronic devices. We formulate the basic ... -
Role of Zn0 electron-selective layers in regular and inverted bulk heterojunction solar cells
American Chemical Society (2011-02)Here the role of metal oxide (ZnO) electron-selective layers in the operating mechanisms of bulk-heterojunction polymer−fullerene solar cells is addressed. Inverted as well as regular structures containing ZnO layers at ... -
Olefin Epoxidation by Molybdenum Peroxo Compound: Molecular Mechanism Characterized by the Electron Localization Function and Catastrophe Theory
ACS (2011-02)The oxygen atom transfer reaction from the Mimoun-type complex MoO(η2-O2)2OPH3 to ethylene C2H4 affording oxirane C2H4O has been investigated within the framework of the Bonding Evolution Theory in which the corresponding ... -
Panchromatic sensitized solar cells based on metal sulfide quantum dots grown directly on nanostructured TiO2 electrodes
American Chemical Society (2011-02)The use of narrow band gap semiconductors such as PbS may expand the light absorption range to the near-infrared region in quantum-dot-sensitized solar cells (QDSCs), increasing the generated photocurrent. However, the ... -
First-passage-time analysis of atomic-resolution simulations of the ionic transport in a bacterial porin
American Physical Society (2011-02-16)We have studied the dynamics of chloride and potassium ions in the interior of the Outer membrane porin F (OmpF) under the influence of an external electric field. From the results of extensive all-atom molecular dynamics ... -
Operating modes of sandwiched light-emitting electrochemical cells
Wiley (2011-03-14)Light-emitting electrochemical cells (LECs) are promising lighting devices in which the redistribution of ionic charges allows for double electronic carrier injection from air-stable electrodes. Uncertainties about the ... -
Modeling and characterization of extremely thin absorber (eta) solar cells based on ZnO nanowires
RSC Publishing (2011-03-15)Extremely thin absorber (eta)-solar cells based on ZnO nanowires sensitized with a thin layer of CdSe have been prepared, using CuSCN as hole transporting material. Samples with significantly different photovoltaic performance ... -
Carrier recombination losses in inverted polymer: Fullerene solar cells with ZnO hole-blocking layer from transient photovoltage and impedance spectroscopy techniques.
© 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 ... -
Characterization of nanostructured hybrid and organic solar cells by impedance spectroscopy
RSC Publishing (2011-04-06)We review the application of impedance spectroscopy in dye-sensitized solar cells, quantum dot-sensitized solar cells and organic bulk heterojunction solar cells. We emphasize the interpretation of the impedance parameters ... -
Porphyrin Dyes with High Injection and Low Recombination for Highly Efficient Mesoscopic Dye-Sensitized Solar Cells
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 ... -
Assessing possibilities and limits for solar cells
Wiley (2011-05-05)What are the solar cell efficiencies that we can strive towards? We show here that several simple criteria, based on cell and module performance data, serve to evaluate and compare all types of today's solar cells. Analyzing ... -
Origin of efficiency enhancement in Nb2O5 coated titanium dioxide nanorod based dye sensitized solar cells
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 ... -
Open-Circuit Voltage Limitation in Low-Bandgap Diketopyrrolopyrrole-Based Polymer Solar Cells Processed from Different Solvents
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 ...