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Journal of Materials Science: Materials in Electronics
Published in: Journal of Materials Science: Materials in Electronics 19/2018

25-07-2018

Enhancement of photoelectrochemical performance of CdSe sensitized seeded TiO2 films

Authors: F. Joudi, W. Chakhari, R. Ouertani, J. Ben Naceur, R. Chtourou

Published in: Journal of Materials Science: Materials in Electronics | Issue 19/2018

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Abstract

In this work, we highlight the effect of TiO2 seed layer (SL) on the photoelectrochemical performances of CdSe/TiO2 photoanodes (PAs). TiO2 thin films were prepared by spin coating starting from a sol gel solution containing TiO2 nanopowder, then sensitized with electrodeposited CdSe nanoparticles. Structural, optical and photoelectrochemical properties of the CdSe/TiO2 PAs with and without the SL were investigated. Charge accumulation processes and charge transfer characteristics were identified by electrochemical impedance spectroscopy. The introduction of the compact TiO2 SL was found to significantly increase the electron transport. The photocurrent density produced by the CdSe/TiO2/SL PA reached 0.95 mA/cm2, about two times higher than that performed by the CdSe/TiO2 PAs. This enhancement might be attributed to a substantial decrease of the leakage current induced by a better crystallization of TiO2 thin films as well as a higher sensitizing effect of the CdSe nanoparticles.
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Metadata
Title
Enhancement of photoelectrochemical performance of CdSe sensitized seeded TiO2 films
Authors
F. Joudi
W. Chakhari
R. Ouertani
J. Ben Naceur
R. Chtourou
Publication date
25-07-2018
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 19/2018
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-018-9715-7

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