Listar Departament: Física por autoría "596e4386-6395-4f8f-950d-b7805c3dc732"
Mostrando ítems 1-20 de 49
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Amorphous Iron Oxyhydroxide Nanosheets: Synthesis, Li Storage, and Conversion Reaction Kinetics
Xu, Chen; Zeng, Yi; Rui, Xianhong; Zhu, Jixin; Tan, Huiteng; Guerrero, Antonio; Toribio, Juan; Bisquert, Juan; Garcia-Belmonte, Germà; Yan, Qingyu American Chemical Society (2013)We present a facile approach to synthesize amorphous iron oxyhydroxide nanosheet from the surfactant-assisted oxidation of iron sulfide nanosheet. The amorphous iron oxyhydroxide nanosheet is porous and has a high surface ... -
Blade Coating High-Quality Formamidinium–Cesium Lead Halide Perovskites with Green Solvent for Efficient and Stable Solar Cells
Zheng, Yupeng; Xu, Xueqing; Liu, Shijun; Xu, Gang; Bi, Zhuoneng; Zhu, Yanqing; Wang, Kai; Liu, Shengzhong (Frank); Guerrero, Antonio; Xing, Guichuan Wiley (2022)Perfecting large-area perovskite film coating technology remains a key challenge to commercialize perovskite solar cells. Herein, nontoxic dimethyl sulfoxide (DMSO) is recommended as the only solvent to fabricate formamidinium ... -
Carrier density and interfacial kinetics of mesoporous TiO2 in aqueous electrolyte determined by impedance spectroscopy
Gimenez, Sixto; Dunn, Halina K.; Rodenas, Pau; Fabregat-Santiago, Francisco; Miralles, Sara G.; Barea, Eva M; Trevisan, Roberto; Guerrero, Antonio; Bisquert, Juan Elsevier (2012)Water splitting at a semiconductor/solution interface with the only input of sunlight to generate hydrogen is one of the most attractive strategies to produce and store chemical energy. In the present study we have ... -
Charge carrier transport and contact selectivity limit the operation of PTB7-based organic solar cells of varying active layer thickness
Guerrero, Antonio; Montcada, Núria F.; Ajuria, Jon; Etxebarria, Ikerne; Pacios, Roberto; Garcia-Belmonte, Germà; Palomares, Emilio Royal Society of Chemistry (2013-08)In this work we study the different electrical loss pathways occurring during the operation of bulk heterojunction solar cells by using a variety of electrical and optical characterization techniques beyond the current ... -
Control of I–V Hysteresis in CH3NH3PbI3 Perovskite Solar Cell
Kim, Hui-Seon; Jang, In-Hyuk; Ahn, Namyoung; Choi, Mansoo; Guerrero, Antonio; Bisquert, Juan; Park, Nam-Gyu ACS Publications (2015-11-09)Mismatch of current (I)-voltage (V) curves with respect to the scan direction, so-called I–V hysteresis, raises critical issue in MAPbI3 (MA = CH3NH3) perovskite solar cell. Although ferroelectric and ion migration have ... -
Current-voltage characteristics of bulk heterojunction organic solar cells: connection between light and dark curves
Pérez Boix, Pablo; Guerrero, Antonio; Marchesi, Luis F.; Garcia-Belmonte, Germà; Bisquert, Juan 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 ... -
Diamond-based electrodes for organic photovoltaic devices
Kovalenko, Alexander; Ashcheulov, Petr; Guerrero, Antonio; Heinrichová, Patricie; Fekete, Ladislav; Vala, Martin; Weiter, Martin; Kratochvílová, Irena; Garcia-Belmonte, Germà Elsevier (2015-03)The present paper demonstrates the possibility of replacing indium–tin oxide (ITO) with heavily boron-doped diamond (BDD). Plasma Enhanced Chemically Vapor Deposited BDDs layers of various thicknesses were prepared containing ... -
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 ... -
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 ... -
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 ... -
Formation Criteria of High Efficiency Perovskite Solar Cells in Ambient Conditions
Aranda Alonso, Clara; Cristobal, Cesar; Shooshtari, Leyla; Li, Cheng; Huettner, Sven; Guerrero, Antonio Royal Society of Chemistry (2017)The field of lead halide perovskites for solar cell applications has recently reported impressive power conversion (PCE) above 22 % using complex mixed cation formulations. Very importantly, highest PCE have been obtained ... -
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 ... -
Inductive and Capacitive Hysteresis of Halide Perovskite Solar Cells and Memristors Under Illumination
Munoz-Diaz, Laura; Rosa, Álvaro Julián; Bou, Agustín; S. Sánchez, Rafael; Romero Herrero, Beatriz; John, Rohit Abraham; Kovalenko, Maksym V.; Guerrero, Antonio; Bisquert, Juan; Laura Muñoz-Díaz Frontiers Media (2022)The current–voltage curves of memristors exhibit significant hysteresis effects of use for information storage and computing. Here, we provide a comparison of different devices based on MAPbI3 perovskite with different ... -
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 ... -
Interfacial Mechanism for Efficient Resistive Switching in Ruddlesden-Popper Perovskites for Non-volatile Memories
Solanki, Ankur; Guerrero, Antonio; Zhang, Qiannan; Bisquert, Juan; Sum, T. C. American Chemical Society (2020-01-16)Ion migration, one origin of current–voltage hysteresis, is the bane of halide perovskite optoelectronics. Herein, we leverage this unwelcome trait to unlock new opportunities for resistive switching using layered ... -
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 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 ... -
Inverted vs Standard PTB7:PC70BM Organic Photovoltaic Devices. The benefit of highly selective and extracting contacts in device performance
Etxebarria, Ikerne; Guerrero, Antonio; Albero, Josep; Garcia-Belmonte, Germà; Palomares, Emilio; Pacios, Roberto Elsevier (2014)In this work we compare the photovoltaic performance of different cell designs, standard and inverted, for one of the most promising systems to achieve power conversion efficiencies over 10% in polymer:fullerene single ...