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Isotype Heterojunction Solar Cells Using n-Type Sb₂Se₃ Thin Films

Hobson, TDC; Phillips, LJ; Hutter, OS; Shiel, H; Swallow, JEN; Savory, CN; Nayak, PK; ... Major, JD; + view all (2020) Isotype Heterojunction Solar Cells Using n-Type Sb₂Se₃ Thin Films. Chemistry of Materials , 32 (6) pp. 2621-2630. 10.1021/acs.chemmater.0c00223. Green open access

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Abstract

The carrier-type of the emerging photovoltaic Sb2Se3 was evaluated for both thin films and bulk crystals via a range of complementary techniques. X-ray photoelectron spectroscopy (XPS), hot probe, Hall effect, and surface photovoltage spectroscopy showed films and crystals synthesized from the Sb2Se3 granulate material to be n-type with chlorine identified as an unintentional n-type dopant via secondary ion mass spectrometry analysis. The validity of chlorine as a dopant was confirmed by the synthesis of intrinsic crystals from metallic precursors and subsequent deliberate n-type doping by the addition of MgCl2. Chlorine was also shown to be a substitutional n-type shallow dopant by density functional theory calculations. TiO2/Sb2Se3 n–n isotype heterojunction solar cells with 7.3% efficiency are subsequently demonstrated, with band alignment analyzed via XPS.

Type: Article
Title: Isotype Heterojunction Solar Cells Using n-Type Sb₂Se₃ Thin Films
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acs.chemmater.0c00223
Publisher version: https://doi.org/10.1021/acs.chemmater.0c00223
Language: English
Additional information: This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Keywords: Crystals, Oxides, Defects, Materials, X-ray photoelectron spectroscopy
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/10094944
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