Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 8, 2016
Previous Article Next Article

Charge transfer processes at the semiconductor/electrolyte interface for solar fuel production: insight from impedance spectroscopy

Author affiliations

Abstract

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.

Graphical abstract: Charge transfer processes at the semiconductor/electrolyte interface for solar fuel production: insight from impedance spectroscopy

Back to tab navigation

Supplementary files

Article information


Submitted
01 May 2015
Accepted
24 Jun 2015
First published
24 Jun 2015

J. Mater. Chem. A, 2016,4, 2873-2879
Article type
Paper
Author version available

Charge transfer processes at the semiconductor/electrolyte interface for solar fuel production: insight from impedance spectroscopy

L. Bertoluzzi, P. Lopez-Varo, J. A. Jiménez Tejada and J. Bisquert, J. Mater. Chem. A, 2016, 4, 2873
DOI: 10.1039/C5TA03210E

Social activity

Search articles by author

Spotlight

Advertisements