Listar FCA_Articles por autoría "944af19c-873b-499a-bde5-e98c03ab08dc"

Mostrando ítems 1-5 de 5

    • openAccess   Combining Modulated Techniques for the Analysis of Photosensitive Devices 

      Alvarez, Agustin; Ravishankar, Sandheep; Fabregat-Santiago, Francisco Wiley-VCH GmbH (2021-09-03)
      Small-perturbation techniques such as impedance spectroscopy (IS), inten-sity-modulated photocurrent spectroscopy (IMPS), and intensity-modulated photovoltage spectroscopy (IMVS) are useful tools to characterize and model ...

    • openAccess   Intensity-Modulated Photocurrent Spectroscopy and Its Application to Perovskite Solar Cells 

      Ravishankar, Sandheep; Riquelme, Antonio; Sarkar, Shaibal; García-Batlle, Marisé; Garcia-Belmonte, Germà; Bisquert, Juan American Chemical Society (2020-09-23)
      Frequency domain techniques are useful tools to characterize processes occurring on different time scales in solar cells and solar fuel devices. Intensity-modulated photocurrent spectroscopy (IMPS) is one such technique ...

    • openAccess   Near-complete suppression of surface losses and total internal quantum efficiency in BiVO4 photoanodes 

      Trzesniewski, Bartek J.; Digdaya, Ibadillah; Nagaki, Tetsuro; Ravishankar, Sandheep; Herraiz Cardona, Isaac; Vermaas, David; Longo, Alessandro; Gimenez, Sixto; Smith, Wilson A. Royal Society of Chemistry (2017-05-26)
      Bismuth vanadate (BiVO4) is one of the most efficient light absorbing metal oxides for solar water splitting. BiVO4 photoanodes immersed in an electrolyte in an open circuit configuration and exposed to simulated solar ...

    • openAccess   Removing Instability-Caused Low-Frequency Features in Small Perturbation Spectra of Perovskite Solar Cells 

      Ravishankar, Sandheep; García-Batlle, Marisé; Bisquert, Juan; Garcia-Belmonte, Germà; Odrobina, Jann; Schiller, Carl-Albrecht American Chemical Society (2020-06-29)
      Small-perturbation frequency-domain techniques such as impedance spectroscopy and intensity-modulated photocurrent spectroscopy (IMPS) have become important methods for the investigation of the physical working mechanisms ...

    • openAccess   Tunable hysteresis effect for perovskite solar cells 

      Rong, Yaoguang; Hu, Yue; Ravishankar, Sandheep; huawei, liu; Hou, Xiaomeng; Sheng, Yusong; Mei, Anyi; Xu, Mi; Bisquert, Juan; Han, Hongwei Royal Society of Chemistry (2017-09-14)
      Perovskite solar cells (PSCs) usually suffer from a hysteresis effect in current–voltage measurements, which leads to an inaccurate estimation of the device e fficiency. Although ion migration, charge trapping/ detrapping, ...