Enhanced Photoresponse of FeS<sub>2</sub> Films: The Role of Marcasite-Pyrite Phase Junctions.
basic_science · Level V
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- Record sourced from PubMed, PMID 27628579.
- Also identified by DOI 10.1002/adma.201602222.
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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-FeS<sub>2</sub> 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.