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A C3v-symmetrical tribenzotriquinacene-based threefold N-heterocyclic carbene. Coordination to rhodium(I) and stereoelectronic properties
Segarra, Candela; Linke, Jens; Mas, Elena; Kuck, Dietmar; Peris, Eduardo Royal Society of Chemistry (2013-09-19)A novel tribenzotriquinacene-based tris-NHC has been obtained and coordinated to rhodium. The new ligand displays a unique rigid C3v symmetry. The electrochemical analysis of the tri-rhodium complex reveals that the three ... -
Additive manufacturing technologies applied to the electrochemical valorization of biomass
Palmara, Gianluca; Carvajal, David; Zanatta, Marcileia; Mas, Elena; Sans, Victor Elsevier (2023-11-11)Biomass valorization is gaining recognition as a sustainable and easily accessible renewable option to produce fuels and chemicals non-derived from fossil fuels, thus contributing to the decarbonization of the energy and ... -
Capacitive dark currents, hysteresis, and electrode polarization in lead halide perovskite solar cells
Almora Rodríguez, Osbel; Zarazúa, Isaac; Mas, Elena; Mora-Sero, Ivan; Bisquert, Juan; Garcia-Belmonte, Germà American Chemical Society (2015-04)Despite spectacular advances in conversion efficiency of perovskite solar cell many aspects of its operating modes are still poorly understood. Capacitance constitutes a key parameter to explore which mechanisms control ... -
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 ... -
Correcting unintended changes in electroluminescence perturbation for reliable light intensity modulated spectroscopies
Alvarez, Agustin; Riquelme, Antonio; Fuentes Pineda, Rosinda; Mas, Elena; Marsal, Lluis F.; Almora Rodríguez, Osbel; Anta, Juan; Fabregat-Santiago, Francisco IOP Publishing (2023-07-21)Light intensity modulated photocurrent and photovoltage spectroscopies, IMPS and IMVS respectively, are characterization techniques for studying charge carrier transport and recombination properties of photosensitive samples ... -
Crystalline-Size Dependence of Dual Emission Peak on Hybrid Organic Lead-Iodide Perovskite Films at Low Temperatures
Chulia-Jordan, Raquel; Mas, Elena; Segura, Alfredo; Bisquert, Juan; Martínez-Pastor, Juan P. American Chemical Society (2018-09)In this work, we have investigated the crystalline-size dependence of optical absorption and photoluminescence emission of CH3NH3PbI3 films, which is necessary to identify the potential practical applications of the gadgets ... -
Direct Observation of the Chemical Transformations in BiVO4 Photoanodes upon Prolonged Light-Aging Treatments
Arcas, Ramón; Cardenas-Morcoso, Drialys; Spadaro, Maria Chiara; García-Tecedor, Miguel; Mesa, Camilo A.; Arbiol, Jordi; Fabregat-Santiago, Francisco; Gimenez, Sixto; Mas, Elena Wiley (2022-03-11)Exposing BiVO4 photoanodes to light-aging treatments is known to produce a significant photocurrent enhancement. Until now, the interpretation given to this phenomenon is associated to the formation of oxygen vacancies and ... -
Effect of different lead precursors on perovskite solar cell performance and stability
Aldibaja, Fadi Kamal; Badia Bou, Laura; Mas, Elena; S. Sánchez, Rafael; Barea, Eva M; Mora-Sero, Ivan Royal Society of Chemistry (2014-12)We present the use of halide (PbCl2) and non-halide lead precursors (Pb(OAc)2 (OAc = CH3CH2COO−), Pb(NO3)2, Pb(acac)2 (acac = (CH3COCHCOCH3)−) and PbCO3) for the preparation of perovskite solar cells. We have confirmed by ... -
Effect of Environmental Humidity on the Electrical Properties of Lead Halide Perovskites
García-Fernández, Alberto; Moradi, Zahra; Bermúdez-García, Juan Manuel; Sánchez Andújar, Manuel; Gimeno Alfonso, Valero; Castro-García, Socorro; Señarís-Rodríguez, M. A.; Mas, Elena; Garcia-Belmonte, Germà; Fabregat-Santiago, Francisco ACS (2018-12)In large quantities, water is detrimental to lead halide perovskite solar cells, mainly because of the decomposition of the perovskite layer. In contrast, the presence of small quantities of water has been observed to play ... -
Electrochemical reduction of HMF to synthesize added value compounds using CuAg electrodes
Carvajal, David; Bolos-Sánchez, Victoria; Solera Rojas, Jose; Mejuto, Carmen; Fabregat-Santiago, Francisco; Mas, Elena Elsevier (2023-12-16)In biorefining, Green electrochemistry offers an intelligent approach to produce valuable chemicals that are not derived from fossil fuels. In this study, we demonstrate the electrochemical reduction of 5-hydroxymethylfurfural ... -
Experimental Data in "New Views on Carrier Diffusion and Recombination by Combining Small Perturbation Techniques: Application to BiVO4 Photoelectrodes"
Alvarez, Agustin; García-Tecedor, Miguel; Montañés, Laura; Mas, Elena; Gimenez, Sixto; Fabregat-Santiago, Francisco (2022) -
Influence of the substrate on the bulk properties of hybrid lead halide perovskite films
Climent-Pascual, Esteban; Clasen Hames, Bruno; Moreno Ramírez, Jorge S.; Álvarez, Ángel Luis; Juarez-Perez, Emilio J.; Mas, Elena; Mora-Sero, Ivan; De Andrés, Alicia; Coya, Carmen Royal Society of Chemistry (2016-10)In addition to the known effect of the substrate on the interfacial properties of perovskite films, here we show that the bulk properties of hybrid lead halide perovskite films depend on the type of substrate used for film ... -
Intramolecular oxidation of the alcohol functionalities in hydroxyalkyl-n-heterocyclic carbene complexes of iridium and rhodium
Benítez Gómez, Miriam; Mas, Elena; Mata Martínez, Jose A; Peris, Eduardo WILEY-VCH Verlag (2011-08-04)A series of hydroxyalkyl-functionalized imidazolium salts have been coordinated to Rh and Ir to afford the corresponding MCp*–(NHC) (Cp*=pentamethylcyclopentadienyl) complexes. The reactivity of the new complexes has been ... -
Ionic Reactivity at Contacts and Aging of Methylammonium Lead Triiodide Perovskite Solar Cells
Carrillo, Jordi; Guerrero, Antonio; Rahimnejad, Sara; Almora Rodríguez, Osbel; Zarazúa, Isaac; Mas, Elena; Bisquert, Juan; Garcia-Belmonte, Germà Wiley (2016-02)Hybrid lead halide perovskites have reached very large solar to electricity power conversion efficiencies, in some cases exceeding 20%. The most extensively used perovskite-based solar cell configuration comprises CH3NH3PbI3 ... -
Light-induced effects on Spiro-OMeTAD films and hybrid lead halide perovskite solar cells
S. Sánchez, Rafael; Mas, Elena Elsevier (2016)Perovskite (PS) solar cells have emerged as a promising technology for low-cost and efficient photovoltaics. However, the main limiting factors are related to their low long-term stability. The loss of performance of ... -
Negative Capacitance and Inverted Hysteresis: Matching Features in Perovskite Solar Cells
Alvarez, Agustin; Arcas, Ramón; Aranda Alonso, Clara; Bethencourt, Loengrid; Mas, Elena; Saliba, Michael; Fabregat-Santiago, Francisco American Chemical Society (2020-10-01)Negative capacitance in the low-frequency domain and inverted hysteresis are familiar features in perovskite solar cells, which origin is still under discussion. Here we use impedance spectroscopy to analyze these responses ... -
New iridium complex as additive to the spiro-OMeTAD in perovskite solar cells with enhanced stability
Badia Bou, Laura; Mas, Elena; S. Sánchez, Rafael; Barea, Eva M; Bisquert, Juan; Mora-Sero, Ivan AIP Publishing (2014-07-23)A new iridium complex, IrCp*Cl(PyPyz)[TFSI], has been synthesized and used as additive for the hole transporter material, spiro-OMeTAD, in perovskite solar cells. The cells prepared with this Ir additive present higher ... -
New Views on Carrier Diffusion and Recombination by Combining Small Perturbation Techniques: Application to BiVO4 Photoelectrodes
Alvarez, Agustin; García-Tecedor, Miguel; Montañés, Laura; Mas, Elena; Gimenez, Sixto; Fabregat-Santiago, Francisco Wiley (2022)Impedance spectroscopy (IS), intensity-modulated photocurrent spectroscopy (IMPS), and intensity-modulated photovoltage spectroscopy (IMVS) are well-established powerful modulated techniques to characterize optoelectronic ... -
On Mott-Schottky analysis interpretation of capacitance measurements in organometal perovskite solar cells
Almora Rodríguez, Osbel; Aranda Alonso, Clara; Mas, Elena; Garcia-Belmonte, Germà AIP Publishing (2016)Capacitance response of perovskite-based solar cells (PSCs) can be exploited to infer underlying physical mechanisms, both in the materials bulk and at outer interfaces. Particularly interesting is applying the depletion ... -
Pencil graphite rods decorated with nickel and nickel-iron as low-cost oxygen evolution reaction electrodes
Arcas, Ramón; Koshino, Yuuki; Mas, Elena; Tsuji, Ryuki; Masutani, Hideaki; Miura-Fujiwara, Eri; Haruyama, Yuichi; Nakashima, Seiji; Ito, Seigo; Fabregat-Santiago, Francisco Royal Society of Chemistry (2021)Society is demanding clean energy to substitute greatly polluting carbon-based fuels. As an alternative, the use of green hydrogen produced by electrocatalysis constitutes a nice strategy as its products and reactants are ...