Listar Departament: Física por autoría "428762fe-4d84-4ba1-a3af-6b52a2502b6a"
Mostrando ítems 1-19 de 19
-
All solution processed low turn-on voltage near infrared LEDs based on core–shell PbS–CdS quantum dots with inverted device structure
S. Sánchez, Rafael; Binetti, Enrico; Torre, J. A.; Garcia-Belmonte, Germà; Striccoli, Marinella; Mora-Sero, Ivan Royal Society of Chemistry (2014)Colloidal semiconductor quantum dots (QDs) are extraordinarily appealing for the development of light emitting devices (LEDs) due to tunable and pure color emission, brightness and solution processability. This last advantage ... -
Analysis of the Hysteresis Behavior of Perovskite Solar Cells with Interfacial Fullerene Self-Assembled Monolayers
Vallés Pelarda, Marta; Clasen Hames, Bruno; García-Benito, Inés; Almora Rodríguez, Osbel; Molina-Ontoria, Agustín; S. Sánchez, Rafael; Garcia-Belmonte, Germà; Martín, Nazario; Mora-Sero, Ivan American Chemical Society (2016-10)The use of self-assembled monolayers (SAMs) of fullerene derivatives reduces the hysteresis of perovskite solar cells (PSCs). We have investigated three different fullerene derivatives observing a decrease on hysteresis ... -
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 ... -
Bright visible-infrared light emitting diodes based on hybrid halide perovskite with Spiro-OMeTAD as a hole-injecting layer
Jaramillo Quintero, Óscar A.; S. Sánchez, Rafael; Rincón, Marina; Mora-Sero, Ivan American Chemical Society (2015-05)Hybrid halide perovskites that are currently intensively studied for photovoltaic applications, also present outstanding properties for light emission. Here, we report on the preparation of bright solid state light emitting ... -
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 ... -
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 organic and inorganic passivation in quantum-dot-sensitized solar cells
De La Fuente, M. S.; S. Sánchez, Rafael; González Pedro, Victoria; Boix, Pablo P; Mhaisalkar, S. G.; Rincón, Marina; Bisquert, Juan; Mora-Sero, Ivan American Chemical Society (2013)The effect of semiconductor passivation on quantum-dot-sensitized solar cells (QDSCs) has been systematically characterized for CdS and CdS/ZnS. We have found that passivation strongly depends on the passivation agent, ... -
Efficient passivated phthalocyanine-quantum dot solar cells
Blas Ferrando, Vicente M.; Ortiz, Javier; González Pedro, Victoria; S. Sánchez, Rafael; Mora-Sero, Ivan; Fernández Lázaro, Fernando; Sastre Santos, Ángela Royal Society of Chemistry (2014-12-08)The power conversion efficiency of CdSe and CdS quantum dot sensitized solar cells is enhanced by passivation with asymmetrically substituted phthalocyanines. The introduction of the phthalocyanine dye increases the ... -
First Experimental Evidence of Amorphous Tin Oxide Formation in Lead-Free Perovskites by Spectroscopic Ellipsometry
Mannino, Giovanni; Sanchez-Diaz, Jesus; Smecca, Emanuele; Valastro, Salvatore; Deretzis, Ioannis; S. Sánchez, Rafael; MARTINEZ PASTOR, JUAN CARLOS; Mora-Sero, Ivan; ALBERTI, ALESSANDRA Wiley (2023)The most promising lead-free options for producing perovskite solar cells are tin halide perovskite materials. Herein, while in situ monitoring the optical evolution of the material in humid air, spectroscopic ellipsometry ... -
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; Gimenez, 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 ... -
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 ... -
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 ... -
Organo-metal halide perovskite-based solar cells with CuSCN as the inorganic hole selective contact
Chavhan, Sudam; Miguel, Óscar; Grande, Hans-Jurgen; González Pedro, Victoria; S. Sánchez, Rafael; Barea, Eva M; Mora-Sero, Ivan; Tena-Zaera, Ramón Royal Society of Chemistry (2014-06)CuSCN is proposed as a cost-competitive hole selective contact for the emerging organo-metal halide perovskite-based solar cells. The CuSCN films have been deposited by a solution casting technique, which has proven to be ... -
Photoinduced Giant Dielectric Constant in Lead Halide Perovskite Solar Cells
Juarez-Perez, Emilio J.; S. Sánchez, Rafael; Badia Bou, Laura; Garcia-Belmonte, Germà; Kang, Yong Soo; Mora-Sero, Ivan; Bisquert, Juan American Chemical Society (2014-06)Organic-inorganic lead trihalide perovskites have emerged as an outstanding photovoltaic material that demonstrated a high 17.9% conversion efficiency of sunlight to electricity in a short time. We have found a giant ... -
Photon Up-Conversion with Lanthanide-Doped Oxide Particles for Solar H2 Generation
Gonell, Francisco; Haro, Marta; S. Sánchez, Rafael; Negro, Patricia; Mora-Sero, Ivan; Bisquert, Juan; Julian-Lopez, Beatriz; Gimenez, Sixto American Chemical Society (2014-05)Up-conversion (UC) of infrared (IR) photons into visible radiation constitutes a promising strategy to enhance the light harvesting efficiency of photovoltaic and photoelectrochemical devices. In the present study, we ... -
Recombination reduction on lead halide perovskite solar cells based on low temperature synthesized hierarchical TiO2 nanorods
Jaramillo Quintero, Óscar A.; Solís de la Fuente, Mauricio; S. Sánchez, Rafael; Recalde, Ileana B.; Juarez-Perez, Emilio J.; Rincón, Marina; Mora-Sero, Ivan Royal Society of Chemistry (2016)Intensive research on the electron transport material (ETM) has been pursued to improve the efficiency of perovskite solar cells (PSCs) and decrease their cost. More importantly, the role of the ETM layer is not yet fully ... -
Slow dynamic processes in lead halide perovskite solar cells. Characteristic times and hysteresis
S. Sánchez, Rafael; González Pedro, Victoria; Lee, Jin Wook; Park, Nam-Gyu; Kang, Yong Soo; Mora-Sero, Ivan; Bisquert, Juan American Chemical Society (2014-06)Characteristic times of perovskite solar cells (PSCs) have been measured by different techniques: transient photovoltage decay, transient photoluminescence, and impedance spectroscopy. A slow dynamic process is detected ... -
Synergistic Interaction of Dyes and Semiconductor Quantum Dots for Advanced Cascade Cosensitized Solar Cells
Blas Ferrando, Vicente M.; Ortiz, Javier; González Pedro, Victoria; S. Sánchez, Rafael; Mora-Sero, Ivan; Fernández Lázaro, Fernando; Sastre Santos, Ángela Wiley (2015-06-03)A new procedure for the cosensitization with quantum dots (QDs) and dyes for sensitized solar cells is reported here. Cascade cosensitization of TiO2 electrodes is obtained by the sensitization with CdS QDs and zinc ... -
Tunable light emission by exciplex state formation between hybrid halide perovskite and core/shell quantum dots: Implications in advanced LEDs and photovoltaics
S. Sánchez, Rafael; Solís de la Fuente, Mauricio; Suárez, Isaac; Muñoz Matutano, G.; Martínez-Pastor, Juan P.; Mora-Sero, Ivan American Association for the Advancement of Science (2016)We report the first observation of exciplex state electroluminescence due to carrier injection between the hybrid lead halide perovskite (MAPbI3–xClx) and quantum dots (core/shell PbS/CdS). Single layers of perovskite (PS) ...