New Views on Carrier Diffusion and Recombination by Combining Small Perturbation Techniques: Application to BiVO4 Photoelectrodes
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Títol
New Views on Carrier Diffusion and Recombination by Combining Small Perturbation Techniques: Application to BiVO4 PhotoelectrodesAutoria
Data de publicació
2022Editor
WileyCita bibliogràfica
ALVAREZ, Agustin O., et al. New Views on Carrier Diffusion and Recombination by Combining Small Perturbation Techniques: Application to BiVO4 Photoelectrodes. Solar RRL, 2022, p. 2200826.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
WileyVersió
info:eu-repo/semantics/publishedVersionResum
Impedance spectroscopy (IS), intensity-modulated photocurrent spectroscopy (IMPS), and intensity-modulated photovoltage spectroscopy (IMVS) are well-established powerful modulated techniques to characterize optoelec ... [+]
Impedance spectroscopy (IS), intensity-modulated photocurrent spectroscopy (IMPS), and intensity-modulated photovoltage spectroscopy (IMVS) are well-established powerful modulated techniques to characterize optoelectronic devices. Their combined use has proven to provide an understanding of the behavior and performance of these systems, far beyond the output obtained from their independent analysis. However, this combination is shown to be challenging when applied to complex systems. Herein, IS, IMPS, and IMVS are cooperatively used, for the first time, to study the distributed photogeneration, diffusion, and recombination processes in a photoanode of zircon-doped bismuth vanadate. The use of this methodology reveals that the carriers that determine the response of the device are the electrons when the device is illuminated from the hole-collector side (electrolyte) and the holes when the illumination reaches the device from the electron-collector side. Detailed quantitative information is obtained for each carrier, including recombination lifetime, diffusion coefficient and collectrion and separation efficiencies, identifying the latter as the main limitation of this device. This methodology is a powerful tool that can be used for the characterization and understanding of the operating processes of other photoconversion devices. [-]
Publicat a
Solar RRL 2022, 6, 2200826Entitat finançadora
Agencia Estatal de Investigación | Generalitat Valenciana | Universitat Jaume I
Codi del projecte o subvenció
PID2020-116093RB-C41
Títol del projecte o subvenció
PROMETEO/2020/028
Drets d'accés
info:eu-repo/semantics/openAccess
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