Listar por autoría "ae9a3a0c-8bfc-4118-badc-a98687bde103"
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Charge transfer processes at the semiconductor/electrolyte interface for solar fuel production: insight from impedance spectroscopy
Bertoluzzi, Luca; Lopez-Varo, Pilar; Jiménez Tejada, Juan Antonio; Bisquert, Juan Royal Society of Chemistry (2016)Knowledge of the nature of charge transfer processes at the semiconductor/electrolyte interface is crucial for the optimization of semiconductors used for solar fuel production. In the literature, there are two types of ... -
Co3O4 based all-oxide PV: a numerical simulation analyzed combinatorial material science study
Bertoluzzi, Luca; Bisquert, Juan; Lopez-Varo, Pilar; Mora-Sero, Ivan; Vidal, Rosario; Majhi, Koushik; Keller, David A.; Barad, Hannah-Noa; Ginsburg, Adam; Anderson, Assaf Y.; Zaban, Arie American Chemical Society (2016)Here we investigate the impact of four different metal back contacts on the photovoltaic (PV) performance of Co3O4 thin film all-oxide photovoltaic cells. A combinatorial TiO2|Co3O4 heterojunction thin film device library ... -
Cooperative kinetics of depolarization in CH3NH3PbI3 perovskite solar cells
Bertoluzzi, Luca; S. Sánchez, Rafael; Liu, Linfeng; Lee, Jin Wook; Mas, Elena; Han, Hongwei; Park, Nam-Gyu; Mora-Sero, Ivan; Bisquert, Juan Royal Society of Chemistry (2015)Despite the large photovoltaic performance recently achieved, many aspects of the working principles of hybrid organic–inorganic perovskite solar cells remain to be unveiled. We analyze the experimental features observed ... -
Energy Diagram of Semiconductor/Electrolyte Junctions
Bisquert, Juan; Cendula, Peter; Bertoluzzi, Luca; Gimenez, Sixto American Chemical Society (2013-12)In electrochemistry and photoelectrochemistry, it is most common to refer the voltage to a reference electrode (RE) or in a two-electrode cell with respect to a counterelectrode (CE).(1, 2) However, in a semiconductor film ... -
Equivalent Circuit of Electrons and Holes in Thin Semiconductor Films for Photoelectrochemical Water Splitting Applications
Bertoluzzi, Luca; Bisquert, Juan American Chemical Society (2012)A simple model for the kinetics of electrons and holes in a thin semiconductor film in photoelectrochemical water splitting conditions is discussed, with a focus to discriminate between trap-assisted recombination and ... -
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 ... -
Interpretation of cyclic voltammetry measurements of thin semiconductor films for solar fuel applications
Bertoluzzi, Luca; Badia Bou, Laura; Fabregat-Santiago, Francisco; Gimenez, Sixto; Bisquert, Juan American Chemical Society (2013)A simple model is proposed that allows interpretation of the cyclic voltammetry diagrams obtained experimentally for photoactive semiconductors with surface states or catalysts used for fuel production from sunlight. When ... -
Investigating the Consistency of Models for Water Splitting Systems by Light and Voltage Modulated Techniques
Bertoluzzi, Luca; Bisquert, Juan American Chemical Society (2016-12)The optimization of solar energy conversion devices relies on their accurate and nondestructive characterization. The small voltage perturbation techniques of impedance spectroscopy (IS) have proven to be very powerful to ... -
On the methods of calculation of the charge collection efficiency of dye sensitized solar cells
Bertoluzzi, Luca; Ma, Shuai Royal Society of Chemistry (2013)The charge collection efficiency is one of the most critical parameters of photovoltaic devices. In this paper we provide the analysis and comparison between several approaches for the calculation of the collection efficiency ... -
Physical aspects of ferroelectric semiconductors for photovoltaic solar energy conversion
Lopez-Varo, Pilar; Bertoluzzi, Luca; Bisquert, Juan; Alexe, Marin; Coll, Mariona; Huang, Jinsong; Jiménez Tejada, Juan Antonio; Kirchartz, Thomas; Nechache, Riad; Rosei, Federico; Yuan, Yongbo Elsevier (2016-10)Solar energy conversion using semiconductors to fabricate photovoltaic devices relies on efficient light absorption, charge separation of electron–hole pair carriers or excitons, and fast transport and charge extraction ... -
Relaxation of Electron Carriers in the Density of States of Nanocrystalline TiO2
Bertoluzzi, Luca; Herraiz Cardona, Isaac; Gottesman, Ronen; Zaban, Arie; Bisquert, Juan American Chemical Society (2014-01)Band gap localized states and surface states play a dominant role in the application of nanocrystalline metal oxides to photovoltaics and solar fuel production. Electrons injected in nanocrystalline TiO2 by voltage or ... -
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 ... -
Theory of Impedance and Capacitance Spectroscopy of Solar Cells with Dielectric Relaxation, Drift-Diffusion Transport, and Recombination
Bisquert, Juan; Bertoluzzi, Luca; Mora-Sero, Ivan; Garcia-Belmonte, Germà American Chemical Society (2014-07)Semiconductor photovoltaic devices currently investigated, such as hybrid organic–inorganic lead halide perovskite based solar cells, have shown a high dielectric polarization combined with ambipolar carrier transport. In ... -
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, ...