Listar por autoría "8a9cf685-19cc-4ae1-a4b8-82afd6454e5b"

Mostrando ítems 1-20 de 20

    • openAccess   3D printed flow reactors for the synthesis of single crystal perovskites 

      Iglesias, Diego; Tinajero Naranjo, Cristopher Alberto; Luis Gómez, Jaume; Aranda Alonso, Clara; Martinez Cuenca, Raul; Zanatta, Marcileia; Sans, Victor Elsevier (2024)
      Defect-free single crystal perovskites have unique photophysical properties that makes them highly attractive for a range of optoelectronic applications. However, their syntheses largely rely on batch protocols, which ...

    • closedAccess   Changes from Bulk to Surface Recombination Mechanisms between Pristine and Cycled Perovskite Solar Cells 

      Correa-Baena, Juan-Pablo; Turren Cruz, Silver Hamill; Tress, Wolfgang; Hagfeldt, Anders; Aranda Alonso, Clara; Shooshtari, Leyla; Bisquert, Juan; Guerrero, Antonio American Chemical Society (2017)
      Several aspects on the photophysical characterization of lead halide hybrid organic–inorganic perovskite solar cells remain unsolved. It has been observed that ionic transport and polarization of the interfaces cause very ...

    • openAccess   Crystalline Clear or Not: Beneficial and Harmful Effects of Water in Perovskite Solar Cells 

      Aranda Alonso, Clara; Guerrero, Antonio; Bisquert, Juan Wiley (2019-10-16)
      Clarification of how water affects the photovoltaic performance of perovskite solar cells is one of the major challenges to successfully develop a large‐scale low‐cost fabrication process. Many authors have reported ...

    • openAccess   Defect tolerant perovskite solar cells from blade coated non-toxic solvents 

      Bi, Zhuoneng; Rodríguez-Martínez, Xabier; Aranda Alonso, Clara; Pascual-San-José, Enrique; Goñi, Alejandro R.; XU, XUEQING; Guerrero, Antonio Royal Society of Chemistry (2018-09)
      The process of crystallization of lead halide perovskites by industrially relevant techniques involving non-toxic solvents is not understood completely and needs improvement. To this date, devices with the highest efficiency ...

    • openAccess   Do Capacitance Measurements Reveal Light-Induced Bulk Dielectric Changes in Photovoltaic Perovskites? 

      Almora Rodríguez, Osbel; Aranda Alonso, Clara; Garcia-Belmonte, Germà American Chemical Society (2018-06)
      Several studies have identified complex interactions between photogenerated carriers and the crystal lattice in perovskite materials for photovoltaics, which are regarded to have an inherently soft character. Light is known ...

    • openAccess   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 ...

    • openAccess   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 ...

    • openAccess   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 ...

    • openAccess   Impedance spectroscopy of perovskite/contact interface: Beneficial chemical reactivity effect 

      Aranda Alonso, Clara; Bisquert, Juan; Guerrero, Antonio AIP Publishing (2019-09-25)
      Understanding chemical reactivity of lead halide perovskite materials with contacts is crucial to improve the stability of these optoelectronic devices. The study of the physical and chemical interactions at the interfacial ...

    • closedAccess   Ionic Effect Enhances Light Emission and the Photovoltage of Methylammonium Lead Bromide Perovskite Solar Cells by Reduced Surface Recombination 

      Aranda Alonso, Clara; Guerrero, Antonio; Bisquert, Juan (2019-02-19)
      The achievement of optimal power conversion efficiencies (PCEs) in wide-band-gap perovskite solar cells (PSCs) is delayed by photovoltage losses associated with poor understanding of recombination dynamics. In this work, ...

    • openAccess   Lead Sulfide Nanocubes for Solar Energy Storage 

      Lemsi, Amira; Cardenas-Morcoso, Drialys; Haro, Marta; Gil Barrachina, Carlos; Aranda Alonso, Clara; Maghraoui Meherzi, Hager; García-Tecedor, Miguel; Gimenez, Sixto; Julian-Lopez, Beatriz Wiley (2020-04-23)
      Lead sulfide (PbS) nanocubes are produced by a very simple solvothermal procedure that uses a unique molecule, ethylenediamine, as solvent and capping ligand to control the size and shape of the nanocrystals. Detailed ...

    • openAccess   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 ...

    • closedAccess   Noncapacitive hysteresis in perovskite solar cells at room temperature 

      Almora Rodríguez, Osbel; Aranda Alonso, Clara; Zarazúa, Isaac; Guerrero, Antonio; Garcia-Belmonte, Germà American Chemical Society (2016)
      The current density−voltage (J−V) curves of perovskite solar cells have been found to present a hysteresis-like distortion when the measurement is done by sweeping the applied voltage at different scan conditions. ...

    • openAccess   Observation of Long-Term Stable Response in MAPbBr3 Single Crystals Monitored through Displacement Currents under Varying Illumination 

      García-Batlle, Marisé; Zia, Waqas; Aranda Alonso, Clara; Saliba, Michael; Almora Rodríguez, Osbel; Guerrero, Antonio; Garcia-Belmonte, Germà Wiley-VCH GmbH (2022-06-30)
      Long life of perovskite devices in working conditions remains the bottleneck for technology application. Stable charge carriers’ transport together with nonreactive contact materials contributes to the increase of the ...

    • openAccess   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 ...

    • closedAccess   Perovskite Solar Cell Modeling Using Light- and Voltage-Modulated Techniques 

      Ravishankar, Sandheep; Aranda Alonso, Clara; Sanchez, Sandy; Bisquert, Juan; Saliba, Michael; Garcia-Belmonte, Germà American Chemical Society (2019-02-27)
      The analysis of the impedance spectroscopy (IS) data of perovskite solar cells (PSCs) has been challenging so far, with the low-frequency phenomena in particular yielding ambivalent results and interpretations. We tackle ...

    • openAccess   Perovskite solar cells with versatile electropolymerized fullerene as electron extraction layer 

      Suárez, María B.; Aranda Alonso, Clara; Macor, Lorena; Durantini, Edgardo N.; Heredia, Daniel A.; Otero, Luis; Guerrero, Antonio; Gervaldo, Miguel Elsevier (2018-10-02)
      An electropolymerized layer of a C60 fullerene derivative was successfully used as selective contact and electron transport layer in perovskite solar cells. The electropolymeric film was formed over FTO electrodes by an ...

    • openAccess   Perovskite Thin Single Crystal for a High Performance and Long Endurance Memristor 

      Fernandez-Guillen, Ismael; Aranda Alonso, Clara; Franco Betancur, Pablo; Vallés-Pelarda, Marta; Momblona, Cristina; Ripolles, Teresa S.; Abargues, Rafael; Boix, Pablo P Wiley (2024)
      Metal halide perovskites (MHPs) exhibit electronic and ionic characteristics suitable for memristors. However, polycrystalline thin film perovskite memristors often suffer from reliability issues due to grain boundaries, ...

    • closedAccess   Quantification of Ionic Diffusion in Lead Halide Perovskite Single Crystals 

      Peng, Wei; Aranda Alonso, Clara; Bakr, Osman M.; Garcia-Belmonte, Germà; Bisquert, Juan; Guerrero, Antonio American Chemical Society (2018)
      Lead halide perovskites are mixed electronic–ionic semiconductors that have recently revolutionized the photovoltaics field. The physical characterization of the ionic conductivity has been rather elusive because of the ...

    • closedAccess   Surface Polarization Model for the Dynamic Hysteresis of Perovskite Solar Cells 

      Ravishankar, Sandheep; Almora Rodríguez, Osbel; Echeverría-Arrondo, Carlos; Ghahremanirad, Elnaz; Aranda Alonso, Clara; Guerrero, Antonio; Fabregat-Santiago, Francisco; Zaban, Arie; Garcia-Belmonte, Germà; Bisquert, Juan American Chemical Society (2017-02)
      The dynamic hysteresis of perovskite solar cells consists of the occurrence of significant deviations of the current density–voltage curve shapes depending on the specific conditions of measurement such as starting voltage, ...