IR-spectrophotoelectrochemical characterization of mesoporous semiconductor films

21Citations
Citations of this article
20Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

A combined IR-spectroscopic and electrochemical approach for the study of photo- and bias-induced reactions at the semiconductor/electrolyte interface is presented. Information on the electronic structure of a mesoporous semiconductor nanoparticle network, concretely the density and distribution of band gap states, as well as the nature of solution species are analyzed in situ. It has been shown that under appropriate conditions the electrode potential determines the quasi-Fermi level throughout the mesoporous film and thus the occupation of IR-active band gap states, independently of the type of external perturbation, i.e., application of a bias voltage or electrode exposure to photons exceeding the semiconductor band gap at open circuit. Importantly, electronic properties of the semiconductor and vibrational properties of solution species can be addressed simultaneously by IR-spectroscopy. In addition, electrochemical methods provide a means for the active manipulation (in potentiostatic measurements) or the passive tracking (during open circuit potential decay) of the quasi-Fermi level in the mesoporous film together with the possibility of electron quantification (by charge extraction experiments). © 2012 American Chemical Society.

References Powered by Scopus

Dye-sensitized solar cells

8266Citations
N/AReaders
Get full text

TiO<inf>2</inf> photocatalysis and related surface phenomena

6004Citations
N/AReaders
Get full text

Determination of rate constants for charge transfer and the distribution of semiconductor and electrolyte electronic energy levels in dye-sensitized solar cells by open-circuit photovoltage decay method

902Citations
N/AReaders
Get full text

Cited by Powered by Scopus

The electrochemistry of nanostructured titanium dioxide electrodes

243Citations
N/AReaders
Get full text

Semiconductor Photocatalysis: Principles and Applications

191Citations
N/AReaders
Get full text

IR spectroscopy applied to metal oxide surfaces: adsorbate vibrations and beyond

85Citations
N/AReaders
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Berger, T., & Anta, J. A. (2012). IR-spectrophotoelectrochemical characterization of mesoporous semiconductor films. Analytical Chemistry, 84(7), 3053–3057. https://doi.org/10.1021/ac300098u

Readers' Seniority

Tooltip

PhD / Post grad / Masters / Doc 7

58%

Researcher 3

25%

Professor / Associate Prof. 2

17%

Readers' Discipline

Tooltip

Chemistry 9

75%

Sports and Recreations 1

8%

Physics and Astronomy 1

8%

Engineering 1

8%

Save time finding and organizing research with Mendeley

Sign up for free