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Optimization and stabilization of electrodeposited Cu2ZnSnS4 photocathodes for solar water reduction


Rovelli, Lorenzo; Tilley, S David; Sivula, Kevin (2013). Optimization and stabilization of electrodeposited Cu2ZnSnS4 photocathodes for solar water reduction. ACS applied materials & interfaces, 5(16):8018-8024.

Abstract

Cu2ZnSnS4 (CZTS) is a promising p-type semiconductor that has not yet been extensively investigated for solar fuel production via water splitting. Here, we optimize and compare two different electrodeposition routes (simultaneous and sequential) for preparing CZTS electrodes. More consistent results are observed with the simultaneous route. In addition, the effect of etching and the presence of a CdS buffer layer on the photocurrent are investigated. Finally, we demonstrate for the first time the stabilization of these electrodes using protecting overlayers deposited by atomic layer deposition (ALD). Our best performing protected electrodes (Mo/CZTS/CdS/AZO/TiO2/Pt) exhibited a photocurrent of over 1 mA cm–2 under standard one sun illumination conditions and a significant improvement in stability over unprotected electrodes.

Abstract

Cu2ZnSnS4 (CZTS) is a promising p-type semiconductor that has not yet been extensively investigated for solar fuel production via water splitting. Here, we optimize and compare two different electrodeposition routes (simultaneous and sequential) for preparing CZTS electrodes. More consistent results are observed with the simultaneous route. In addition, the effect of etching and the presence of a CdS buffer layer on the photocurrent are investigated. Finally, we demonstrate for the first time the stabilization of these electrodes using protecting overlayers deposited by atomic layer deposition (ALD). Our best performing protected electrodes (Mo/CZTS/CdS/AZO/TiO2/Pt) exhibited a photocurrent of over 1 mA cm–2 under standard one sun illumination conditions and a significant improvement in stability over unprotected electrodes.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:2013
Deposited On:27 May 2015 15:34
Last Modified:05 Apr 2016 19:15
Publisher:American Chemical Society (ACS)
ISSN:1944-8244
Publisher DOI:https://doi.org/10.1021/am402096r

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