Charge transfer processes at the semiconductor/electrolyte interface for solar fuel production: insight from impedance spectroscopy
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Altres documents de l'autoria: Bertoluzzi, Luca; Lopez-Varo, Pilar; Jiménez Tejada, Juan Antonio; Bisquert, Juan
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http://dx.doi.org/10.1039/C5TA03210E |
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Títol
Charge transfer processes at the semiconductor/electrolyte interface for solar fuel production: insight from impedance spectroscopyData de publicació
2016Editor
Royal Society of ChemistryISSN
2050-7488; 2050-7496Cita bibliogràfica
BERTOLUZZI, Luca, et al. Charge transfer processes at the semiconductor/electrolyte interface for solar fuel production: insight from impedance spectroscopy. Journal of Materials Chemistry A, 2016, vol. 4, no. 8, p. 2873-2879Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://pubs.rsc.org/en/content/articlehtml/2016/ta/c5ta03210eVersió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
Knowledge of the nature of charge transfer processes at the semiconductor/electrolyte interface is crucial for the optimization of semiconductors used for solar fuel production. In the literature, there are two types ... [+]
Knowledge of the nature of charge transfer processes at the semiconductor/electrolyte interface is crucial for the optimization of semiconductors used for solar fuel production. In the literature, there are two types of charge transfer mechanisms: (i) direct hole transfer from the valence band and (ii) indirect hole transfer via surface states. In this paper, we discuss both processes in the steady state regime through full drift-diffusion simulations considering the concomitant influence of the electric field and surface states at the semiconductor/electrolyte interface. We discuss the role of surface states and valence band holes in the photo-anodic current. We subsequently analyze both hole transfer processes in a dynamic regime via the impedance spectroscopy (IS) method. We provide a solid criterion to discriminate both mechanisms and discuss some experimental examples from the literature. [-]
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Journal of Materials Chemistry A, 2016, vol. 4, no. 8Drets d'accés
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