Listar por autoría "3a0ecafd-aaf4-4d5e-a560-e99d97c58b8c"
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An Equivalent Circuit for Perovskite Solar Cell Bridging Sensitized to Thin Film Architectures
Yoo, So-Min; YOON, SEOG JOON; Anta, Juan A.; Lee, Hyo Joong; Boix, Pablo P; Mora-Sero, Ivan Elsevier (2019-08-15)Fundamental working mechanisms of perovskite solar cells (PSCs) remain an elusive topic of research. Impedance spectroscopy (IS) has been key to characterizing photovoltaic devices; however, its application to PSCs has ... -
Charge separation at disordered semiconductor heterojunctions from random walk numerical simulations
Mandujano-Ramírez, Humberto J.; González Vázquez, J. P.; Oskam, Gerko; Dittrich, Thomas; Garcia-Belmonte, Germà; Mora-Sero, Ivan; Bisquert, Juan; Anta, Juan A. Royal Society of Chemistry (2014)Many recent advances in novel solar cell technologies are based on charge separation in disordered semiconductor heterojunctions. In this work we use the Random Walk Numerical Simulation (RWNS) method to model the dynamics ... -
Effects of Frequency Dependence of the External Quantum Efficiency of Perovskite Solar Cells
Ravishankar, Sandheep; Aranda Alonso, Clara; Boix, Pablo P; Anta, Juan A.; Bisquert, Juan; Garcia-Belmonte, Germà American Chemical Society (2018-05)Perovskite solar cells are known to show very long response time scales, on the order of milliseconds to seconds. This generates considerable doubt over the validity of the measured external quantum efficiency (EQE) and ... -
Effects of Ion Distributions on Charge Collection in Perovskite Solar Cells
Lopez-Varo, Pilar; Jiménez Tejada, Juan Antonio; García-Rosell, Manuel; Anta, Juan A.; Ravishankar, Sandheep; Bou, Agustín; Bisquert, Juan American Chemical Society (2017) -
Homeopathic Perovskite Solar Cells: Effect of Humidity during Fabrication on the Performance and Stability of the Device
Contreras-Bernal, Lidia; Aranda Alonso, Clara; Valles-Pelarda, Marta; Ngo, Thi Tuyen; Ramos-Terrón, Susana; Gallardo Bernal, Juan Jesus; Navas, Javier; Guerrero, Antonio; Mora-Sero, Ivan; Idígoras, Jesús; Anta, Juan A. American Chemical Society (2018-02)Rapid degradation in humid environments is a major drawback of methylammonium lead iodide (CH3NH3PbI3), which is the archetypical component of perovskite solar cells. In this work, we have investigated the aging and ... -
Impedance analysis of perovskite solar cells: a case study
Contreras-Bernal, Lidia; Ramos-Terrón, Susana; Riquelme, Antonio; Boix, Pablo P; Idígoras, Jesús; Mora-Sero, Ivan; Anta, Juan A. Royal Society of Chemistry (2019)Metal halide perovskites are mixed electronic-ionic semiconductors with an extraordinary rich optoelectronic behavior and the capability to function very efficiently as active layers in solar cells, with a record efficiency ... -
Interpretation of Diffusion and Recombination in Nanostructured and Energy-Disordered Materials by Stochastic Quasiequilibrium Simulation
Ansari-Rad, Mehdi; Anta, Juan A.; Bisquert, Juan American Chemical Society (2013)The main electronic feature of many nanocrystalline semiconductors and I organic materials is the presence of a distribution of localized states in the system with a broad energy dispersion. Carrier transport and recombination ... -
Interpretation of diffusion coefficients in nanostructured materials from random walk numerical simulation
Anta, Juan A.; Dittrich, Thomas; Bisquert, Juan; Mora-Sero, Ivan Royal Society of Chemistry (2008)We make use of the numerical simulation random walk (RWNS) method to compute the ‘‘jump’’ diffusion coefficient of electrons in nanostructured materials via mean-square displacement. First, a summary of analytical results ... -
Random walk numerical simulation for hopping transport at finite carrier concentrations: diffusion coefficient and transport energy concept
González Vázquez, J. P.; Anta, Juan A.; Bisquert, Juan Royal Society of Chemistry (2009)The random walk numerical simulation (RWNS) method is used to compute diffusion coefficients for hopping transport in a fully disordered medium at finite carrier concentrations. We use Miller–Abrahams jumping rates and ...