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Solar tandem water splitting from efficient III-V photovoltaics: Implications of electrochemical surface activation

Muñoz, Andrés G. and Heine, Ch. and Hannappel, Th. and Lewerenz, H. J. (2018) Solar tandem water splitting from efficient III-V photovoltaics: Implications of electrochemical surface activation. Electrochimica Acta, 260 . pp. 861-871. ISSN 0013-4686. https://resolver.caltech.edu/CaltechAUTHORS:20180125-082145582

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Abstract

Efficient photovoltaic tandem cells made of III-V semiconductors open a promising way for the realization of direct solar water splitting devices (artificial leaf) with real economic impact. The growth of an interfacial oxide separating the semiconductor from the metal catalyst brings about chemical stability and an enhancement of the charge transfer efficiency at the semiconductor-electrolyte interface. Thus, the light-induced hydrogen evolution at the illuminated front of the device can be maximized upon attainment of a particular composition and structure of the oxide. Chemical and electronic issues of the oxide grown photo-electrochemically on p-type InP(100) surfaces prepared by metalorganic vapor phase epitaxy (MOVPE) were investigated by of high-resolution surface techniques. Complementary investigations of the photo-electroplated p-type Si/In/indium-oxide interface provided a deeper insight into the influence of indium oxide and the inclusion of chloride on the photo-electrochemical activation.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.electacta.2017.12.057DOIArticle
https://www.sciencedirect.com/science/article/pii/S0013468617326178PublisherArticle
ORCID:
AuthorORCID
Hannappel, Th.0000-0002-6307-9831
Lewerenz, H. J.0000-0001-8433-9471
Additional Information:© 2017 Elsevier Ltd. Received 12 September 2017, Revised 7 December 2017, Accepted 8 December 2017, Available online 11 December 2017. The authors acknowledge the technical support provided by W. Calvet at the SoLiAS system in Bessy II at the Helmholtz Centre Berlin. One of us (A.G.M) thanks the GRS gGmbH for the financial support of the solar hydrogen initiative.
Funders:
Funding AgencyGrant Number
Gesellschaft für Anlagen- und Reaktorsicherheit (GRS)UNSPECIFIED
Subject Keywords:MOVPE p-type InP; Solar water splitting; Photo-electrochemical surface conditioning; Synchrotron radiation photoelectron spectroscopy; InP-oxide interface
Record Number:CaltechAUTHORS:20180125-082145582
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180125-082145582
Official Citation:Andrés G. Muñoz, Ch Heine, Th Hannappel, H.J. Lewerenz, Solar tandem water splitting from efficient III-V photovoltaics: Implications of electrochemical surface activation, Electrochimica Acta, Volume 260, 2018, Pages 861-871, ISSN 0013-4686, https://doi.org/10.1016/j.electacta.2017.12.057. (http://www.sciencedirect.com/science/article/pii/S0013468617326178)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84513
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:25 Jan 2018 17:12
Last Modified:08 Oct 2019 21:43

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