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Enhanced Photoresponse of FeS2 Films: The Role of Marcasite-Pyrite Phase Junctions

Wu, L; Dzade, NY; Gao, L; Scanlon, DO; Öztürk, Z; Hollingsworth, N; Weckhuysen, BM; ... Hofmann, JP; + view all (2016) Enhanced Photoresponse of FeS2 Films: The Role of Marcasite-Pyrite Phase Junctions. Advanced Materials , 28 (43) pp. 9602-9607. 10.1002/adma.201602222. Green open access

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Abstract

The beneficial role of marcasite in iron-sulfide-based photo-electrochemical applications is reported for the first time. A spectacular improvement of the photoresponse observed experimentally for mixed pyrite/marcasite-FeS2 films can be ascribed to the presence of p/m phase junctions at the interface. Density functional theory calculations show that the band alignment at the phase boundary contributes to enhanced charge separation and transfer across the interface.

Type: Article
Title: Enhanced Photoresponse of FeS2 Films: The Role of Marcasite-Pyrite Phase Junctions
Location: Germany
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/adma.201602222
Publisher version: http://dx.doi.org/10.1002/adma.201602222
Language: English
Additional information: This is the peer reviewed version of the following article: Wu, L; Dzade, NY; Gao, L; Scanlon, DO; Öztürk, Z; Hollingsworth, N; Weckhuysen, BM; (2016) Enhanced Photoresponse of FeS2 Films: The Role of Marcasite-Pyrite Phase Junctions. Advanced Materials, 28 (43) pp. 9602-9607, which has been published in final form at: http://dx.doi.org/10.1002/adma.201602222. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving (http://olabout.wiley.com/WileyCDA/Section/id-828039.html#terms).
Keywords: band alignment, charge separation, marcasite, phase junctions, pyrite
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1518142
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