Visualitza FCA_Articles per autoria "99a30935-9bd0-4850-9bf2-1d8ce0b378b1"
Ara mostrant els elements 1-20 d 39
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A review of recent results on electrochemical determination of the density of electronic states of nanostructured metal-oxide semiconductors and organic hole conductors
Bisquert, Juan; Fabregat-Santiago, Francisco; Mora-Sero, Ivan; Garcia-Belmonte, Germà; Barea, Eva M; Palomares, Emilio Elsevier (2008)The paper reviews recent results on electrochemical methods applied to the determination of the density of electronic states in several components of advanced nanostructured devices such as the dye solar cell (Grätzel ... -
A star-shaped sensitizer based on thienylenevinylene for dye-sensitized solar cells
Urbani, Maxence; Barea, Eva M; Trevisan, Roberto; Aljarilla, Ana; De la Cruz, Pilar; Bisquert, Juan; Langa, Fernando Elsevier (2013-01)A novel star-shaped dye based on highly conjugated oligothienylenevinylene (nTV) bearing pendant solubilizing hexyl chains and end-capped with three tetramethylammonium cyanoacetates as anchoring groups has been synthetized. ... -
Analysis of the Origin of Open Circuit Voltage in Dye Solar Cells
Raga, Sonia R.; Barea, Eva M; Fabregat-Santiago, Francisco American Chemical Society (2012)Changes in the composition of the electrolyte are known to affect the parameters that determine the performance of dye solar cells. This paper describes a robust method for the analysis of the photovoltage in dye solar ... -
Analysis of the UV ozone-treated SnO2 electron transporting layer in planar perovskite solar cells for high performance and reduced hysteresis
Méndez, Perla; muhammed, kunnummal; Barea, Eva M; Masi, Sofia; Mora-Sero, Ivan Wiley - Blackwell (2019)Tin oxide (SnO2) is widely used as electron transporting layer (ETL) in perovskite solar cells (PSCs) because its good transparency, band alignment to perovskite and stability. The interface between the ETL and the ... -
Balanced change in crystal unit cell volume and strain leads to stable halide perovskite with high guanidinium content
Serafini, Patricio; Gualdrón Reyes, Andrés Fabián; S. Sánchez, Rafael; Barea, Eva M; Masi, Sofia; Mora-Sero, Ivan Royal Society of Chemistry (2022)Up-to-date studies propose that strain in halide perovskites is one of the key factors that determine a device's efficiency and stability. Here, we show a systematic approach to characterize the phenomenon in the standard ... -
Carrier density and interfacial kinetics of mesoporous TiO2 in aqueous electrolyte determined by impedance spectroscopy
Giménez Juliá, 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 mobility and lifetime of organic bulk heterojunctions analyzed by impedance spectroscopy
Garcia-Belmonte, Germà; Munar, Antoni; Barea, Eva M; Bisquert, Juan; Ugarte, Irati; Pacios, Roberto Elsevier (2008)Charge carrier diffusion and recombination in an absorber blend of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C<sub>61</sub>-butyric acid methyl ester (PCBM) with indium tin oxide (ITO) and aluminium contacts have been ... -
Co-adsorbing effect of bile acids containing bulky amide groups at 3β-position on the photovoltaic performance in dye-sensitized solar cells
Soto-Navarro, Andrea; Alfaro, Ariel; Soto-Tellini, Víctor Hugo; Moehl, Thomas; Barea, Eva M; Fabregat-Santiago, Francisco; Pineda, Leslie William Elsevier (2019)Co-adsorbing molecules attain certain control in the surrounding of the dyes leading to enhanced efficiencies mainly by affecting the recombination of the photogenerated electrons and aggregation of dyes. Bile acids such ... -
Conjugated Organic Cations to Improve the Optoelectronic Properties of 2D/3D Perovskites
Rodríguez Romero, Jesús; Clasen Hames, Bruno; Mora-Sero, Ivan; Barea, Eva M American Chemical Society (2017)Use of C6H5NH3I as an organic cation instead of CH3(CH2)3NH3I in the synthesis of 2D/3D perovskites (C6H5NH3I)2(CH3NH3I)n−1(PbI2)n leads to a material with significantly improved photovoltaic and optoelectronic properties ... -
Determination of charge carrier mobility of hole transporting polytriarylamine-based diodes
Barea, Eva M; Garcia-Belmonte, Germà; Sommer, Michael; Hüttner, Sven; Bolink, Henk J.; Thelakkat, Mukundan Elsevier (2010)Hole transport properties of three different side chain poly(triarylamines) have been determined by means of the analysis of steady-state current-voltage characteristics using co-planar diode structures. The interpretation ... -
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 the bridge substitution on the efficiency of dye-sensitized solar cells
González Pedro, Victoria; Barea, Eva M; Langa, Fernando; De la Cruz, Pilar; Pelado, Beatriz Elsevier (2012-12)We have designed and synthesized a novel D–π–A dye based on zinc porphyrin as the donor, cyanoacrylic acid as the acceptor and trans-bis(3,4-ethylenedioxythiophene)vinylene as the bridge. Under standard global AM 1.5 solar ... -
Effect of the chromophores structures on the performance of solid-state dye sensitized solar cells
Tian, Haining; Soto, Andrea; Xu, Bo; Sun, Licheng; Hagfeldt, Anders; Fabregat-Santiago, Francisco; Mora-Sero, Ivan; Kang, Yong Soo; Bisquert, Juan; Barea, Eva M World Scientific Publishing (2014)The effect of metal-free chromophores on dye-sensitized solar cell performance is investigated. Solid state dye-sensitized solar cells (ssDSCs) using different molecular sensitizers based on triphenylamine (TPA) with ... -
Efficient blue emitting organic light emitting diodes based on fluorescent solution processable cyclic phosphazenes
Bolink, Henk J.; Barea, Eva M; Costa, Rubén D; Coronado, Eugenio; Sudhakar, S Marla; Zhen, Changgua; Sellinger, Alan Elsevier (2008)Solution processable blue fluorescent dendrimers based on cyclic phosphazene (CP) cores incorporating amino-pyrene moieties have been prepared and used as emissive layers in organic light emitting diodes (OLEDs). These ... -
Electron Transport Layer-Free Solar Cells Based on Perovskite? Fullerene Blend Films with Enhanced Performance and Stability
Pascual, Jorge; Kosta, Ivet; Ngo, Thi Tuyen; Chuvilin, Andrey; Cabanero, Germán; Grande, Hans J.; Barea, Eva M; Mora-Sero, Ivan; Delgado, Juan Luis; Tena-Zaera, Ramón Wiley (2016-08)The solution processing of pinhole-free methylammonium lead triiodide perovskite–C70 fullerene (MAPbI3:C70) blend films on fluorine-doped tin oxide (FTO)-coated glass substrates is presented. Based on this approach, a ... -
General Working Principles of CH3NH3PbX3 Perovskite Solar Cells
González Pedro, Victoria; Juarez-Perez, Emilio J.; Arsyad, Waode Sukmawati; Barea, Eva M; Fabregat-Santiago, Francisco; Mora-Sero, Ivan; Bisquert, Juan American Chemical Society (2014)Organometal halide perovskite-based solar cells have recently realized large conversion efficiency over 15% showing great promise for a new large scale cost-competitive photovoltaic technology. Using impedance spectroscopy ... -
Harnessing infrared photons for photoelectrochemical hydrogen generation. A PbS quantum dot based "quasi-artificial leaf"
Trevisan, Roberto; Rodenas, Pau; González Pedro, Victoria; Sima, Cornelia; S. Sánchez, Rafael; Barea, Eva M; Mora-Sero, Ivan; Fabregat-Santiago, Francisco; Giménez Juliá, Sixto American Chemical Society (2013)Hydrogen generation by using quantum dot (QD) based heterostructures has emerged as a promising strategy to develop artificial photosynthesis devices. In the present study, we sensitize mesoporous TiO2 electrodes with ... -
High carrier density and capacitance in TiO2 Nanotube arrays induced by electrochemical doping
Fabregat-Santiago, Francisco; Barea, Eva M; Bisquert, Juan; Mor, Gopal K.; Shankar, Karthik; Grimes, Craig A. American Chemical Society (2008)The paper describes the electronic charging and conducting properties of vertically oriented TiO2 nanotube arrays formed by anodization of Ti foil samples. The resulting films, composed of vertically oriented nanotubes ... -
In Situ Spectroscopic Ellipsometry for Thermochromic CsPbI3 Phase Evolution Portfolio
Yuan, Meng; Yuan, Long; Hu, Zhiyan; Yu, Zhaoliang; Li, Haibo; Barea, Eva M; Bisquert, Juan; Meng, Xiangdong American Chemical Society (2020-04-09)Thermochromism is a color change phenomenon for a compound when it undergoes a heating/cooling process. The observation of this phenomenon mostly relies on the naked eye, rather than an exact optical technique, which retards ... -
Injection and Recombination in Dye-Sensitized Solar Cells with a Broadband Absorbance Metal-Free Sensitizer Based on Oligothienylvinylene
Caballero, Rubén; Barea, Eva M; Fabregat-Santiago, Francisco; De la Cruz, Pilar; Márquez, Lourdes; Langa, Fernando; Bisquert, Juan American Chemical Society (2008)A new metal-free sensitizer for improved light harvesting with dye-sensitized solar cells (DSC) has been synthesized and fully characterized. The molecular sensitizer was engineered by linking the tiophenes groups by methine ...