ListarFCA_Articles por tema "Cèl·lules solars"
Mostrando ítems 1-9 de 9
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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 ... -
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 ... -
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 ... -
Current-voltage characteristics of bulk heterojunction organic solar cells: connection between light and dark curves
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 ... -
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). ... -
Impedance spectroscopy of thin-film CdTe/CdS solar cells under varied illumination
American Institute of Physics (2009)The electrical properties of CdTe/CdS solar cells grown by metal organic chemical vapor deposition were investigated by a technique of impedance measurements under varied intensity of AM1.5 illumination. A generalized ... -
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 ... -
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 ... -
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 ...