Listar Departament: Física por autoría "ef941584-f910-4cea-89fc-b10690d6dc3f"
Mostrando ítems 21-40 de 94
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Dielectric losses measured in a sodium aluminosilicate glass by using electrical insulating barriers and non-isothermal experimental conditions
Henn, F.; Garcia-Belmonte, Germà; Bisquert, Juan; Devautour-Vinot, S.; Giuntini, J. C. Elsevier (2008)Ac conductivity and dielectric losses are measured on a sodium aluminosilicate glass using various experimental conditions. Data obtained using metallic contacts and insulating barriers are compared. The influences of the ... -
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 ... -
Doping-induced broadening of the hole density-of-states in conducting polymers
Garcia-Belmonte, Germà; Vakarin, Eduard V.; Bisquert, Juan; Badiali, Jean Pierre Elsevier (2010)The density-of-states distribution in conducting polymers reflects the energy disorder caused by electrostatic and steric interactions resulting from the different environment in which each molecule is placed. In case of ... -
Electrical field profile and doping in planar lead halide perovskite solar cells
Guerrero, Antonio; Juarez-Perez, Emilio J.; Bisquert, Juan; Mora-Sero, Ivan; Garcia-Belmonte, Germà AIP Publishing (2014-09-29)Hybrid lead halide perovskites (PVKs) have emerged as novel materials for photovoltaics and have rapidly reached very large solar to electricity power conversion efficiencies. As occurring with other kind of solar technologies ... -
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 ... -
Electron Lifetime in Dye-Sensitized Solar Cells: Theory and Interpretation of Measurements
Bisquert, Juan; Fabregat-Santiago, Francisco; Mora-Sero, Ivan; Garcia-Belmonte, Germà; Gimenez, Sixto American Chemical Society (2009)The electron lifetime τn in dye-sensitized solar cells (DSC) is a central quantity to determine the recombination dynamics in the solar cell. It can be measured by several methods: impedance spectroscopy, IMVS, stepped ... -
Elucidating Operating Modes of Bulk-Heterojunction Solar Cells from Impedance Spectroscopy Analysis
Garcia-Belmonte, Germà; Guerrero, Antonio; Bisquert, Juan American Chemical Society (2013)We discuss the progress and challenges in the application of impedance spectroscopy analysis to determine key processes and parameters in organic bulk-heterojunction solar cells. When carrier transport or outer interface ... -
Facile kinetics of Li-ion intake causes superior rate capability in multiwalled carbon nanotube@TiO2 nanocomposite battery anodes
Acevedo Peña, Próspero; Haro, Marta; Rincón, Marina; Bisquert, Juan; Garcia-Belmonte, Germà Elsevier (2014-12)Nanotechnology produces hybrids with superior properties than its individual constituents. Here MWCNT@TiO2 composites have been synthesized by controlled hydrolysis of titanium isopropoxide over MWCNT, to be incorporated ... -
Germanium coating boosts lithium uptake in Si nanotube battery anodes
Haro, Marta; Song, Taeseup; Guerrero, Antonio; Bertoluzzi, Luca; Bisquert, Juan; Paik, Ungyu; Garcia-Belmonte, Germà Royal Society of Chemistry (2014)Si nanotubes for reversible alloying reaction with lithium are able to accommodate large volume changes and offer improved cycle retention and reliable response when incorporated into battery anodes. However, Si nanotubes ... -
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 ... -
Impact of Capacitive Effect and Ion Migration on the Hysteretic Behavior of Perovskite Solar Cells
Chen, Bo; Yang, Mengjin; Zheng, Xiaojia; Wu, Congcong; Li, Wenle; Yan, Yongke; Bisquert, Juan; Garcia-Belmonte, Germà; Zhu, Kai; Priya, Shashank American Chemical Society (2015-11)In the past five years, perovskite solar cells (PSCs) based on organometal halide perovskite have exhibited extraordinary photovoltaic (PV) performance. However, the PV measurements of PSCs have been widely recognized to ... -
Impedance of carrier injection at the metal-organic interface mediated by surface states in electron-only tris(8-hydroxyquinoline) aluminium (Alq<sub>3</sub>) thin layers
Garcia-Belmonte, Germà; Bisquert, Juan; Bueno, Paulo R.; Graeff, C. F. O. Elsevier (2008)Capacitance spectra of thin (<200 nm) Alq<sub>3</sub> electron-only devices have been measured as a function of bias voltage. Capacitance spectra exhibit a flat response at high frequencies (>10<sup>3</sup> Hz) and ... -
Impedance spectroscopy characterisation of highly efficient silicon solar cells under different light illumination intensities
Mora-Sero, Ivan; Garcia-Belmonte, Germà; Pérez Boix, Pablo; Vázquez, Miguel A.; Bisquert, Juan Royal Society of Chemistry (2009)Highly efficient silicon solar cells have been characterised by impedance spectroscopy and current–potential characteristic in the dark and with different illumination intensities. For each illumination the impedance ... -
Impedance spectroscopy of thin-film CdTe/CdS solar cells under varied illumination
Proskuryakov, Y. Y.; Durose, K.; Al Turkestani, M. K.; Mora-Sero, Ivan; Garcia-Belmonte, Germà; Fabregat-Santiago, Francisco; Bisquert, Juan; Barrioz, Vincent; Lamb, Dan; Irvine, S. J. C.; Jones, Eurig Wyn 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 ... -
Intensity-Modulated Photocurrent Spectroscopy and Its Application to Perovskite Solar Cells
Ravishankar, Sandheep; Riquelme, Antonio; Sarkar, Shaibal; García-Batlle, Marisé; Garcia-Belmonte, Germà; Bisquert, Juan American Chemical Society (2020-09-23)Frequency domain techniques are useful tools to characterize processes occurring on different time scales in solar cells and solar fuel devices. Intensity-modulated photocurrent spectroscopy (IMPS) is one such technique ... -
Interface inductive currents and carrier injection in hybrid perovskite single crystals
Kovalenko, Alexander; Pospisil, Jan; Krajcovic, Jozef; Weiter, Martin; Guerrero, Antonio; Garcia-Belmonte, Germà AIP Publishing (2017-10)nterfaces between the absorbing perovskite and transporting layers are gaining attention as the key locus that governs solar cell operation and long term performance. The interplay of ionic and electronic processes, along ... -
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 ... -
Interplay of host volume variations and internal distortions in the course of intercalation into disordered matrices
Garcia-Belmonte, Germà; Vakarin, Eduard V.; Badiali, Jean Pierre (2007)Based on a combination of the distortive lattice gas model and the maximum information entropy approach, the thermodynamics of insertion into disordered hosts is analyzed. It is found that the isotherm specificities can ... -
Interplay of Optical, Morphological, and Electronic Effects of ZnO Optical Spacers in Highly Efficient Polymer Solar Cells
Ben Diki, Sadok; Duché, David; Gaceur, Meriem; Thakur, Anil K.; Bencheikh Aboura, Fatima; Escoubas, Ludovic; Simon, Jean-Jacques; Guerrero, Antonio; Bisquert, Juan; Garcia-Belmonte, Germà; Bao, Qinye; Fahlmann, Mats; Videlot-Ackermann, Christine; Margeat, Olivier; Ackermann, Jörg Wiley (2014-12-29)Optical spacers based on metal oxide layers have been intensively studied in poly(3-hexylthiophene) (P3HT) based polymer solar cells for optimizing light distribution inside the device, but to date, the potential of such ... -
Introducció a l'experimentació
Garcia-Belmonte, Germà; Bisquert, Juan; Hernández, María Jesús; Bal·le, Salvador; Mañosa, Lluis Publicacions de la Universitat Jaume I (1999)Normalment les coses que s'aprenen en el laboratori requereixen el guiatge d'experts. Aquest llibre presenta una visió sumària i actualitzada dels procediments bàsics de l'experimentació cientificotècnica: assenyala i ...