Stoerzinger, KA, Du, Y, Spurgeon, SR et al. (5 more authors) (2018) Chemical and electronic structure analysis of a SrTiO3(001)/p-Ge (001) hydrogen evolution photocathode. MRS Communications, 8 (2). pp. 446-452. ISSN 2159-6859
Abstract
Germanium is a small-gap semiconductor that efficiently absorbs visible light, resulting in photoexcited electrons predicted to be sufficiently energetic to reduce H 2 O for H 2 gas evolution. In order to protect the surface from corrosion and prevent surface charge recombination in contact with aqueous pH 7 electrolyte, we grew epitaxial SrTiO 3 layers of different thicknesses on p-Ge (001) surfaces. Four-nanometer SrTiO 3 allows photogenerated electrons to reach the surface and evolve H 2 gas, while 13 nm SrTiO 3 blocks these electrons. Ambient pressure x-ray photoelectron spectroscopy indicates that the surface readily dissociates H 2 O to form OH species, which may impact surface band bending.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © Materials Research Society 2018. This is an author produced version of a paper published in MRS Communications. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 17 Apr 2018 13:15 |
Last Modified: | 19 Sep 2018 00:39 |
Status: | Published |
Publisher: | Cambridge University Press |
Identification Number: | 10.1557/mrc.2018.38 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:129725 |