Isotype heterojunction solar cells using n-type Sb2Se3 thin films

Hobson, Theodore D. C., Phillips, Laurie J., Hutter, Oliver, Shiel, Huw, Swallow, Jack E. N., Savory, Christopher N., Nayak, Pabitra K., Mariotti, Silvia, Das, Bhaskar, Bowen, Leon, Jones, Leanne A. H., Featherstone, Thomas J., Smiles, Matthew J., Farnworth, Mark A., Zoppi, Guillaume, Thakur, Pardeep K., Lee, Tien-Lin, Snaith, Henry J., Leighton, Chris, Scanlon, David O., Dhanak, Vinod R., Durose, Ken, Veal, Tim D. and Major, Jonathan D. (2020) Isotype heterojunction solar cells using n-type Sb2Se3 thin films. Chemistry of Materials. ISSN 0897-4756 (In Press)

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Official URL: https://doi.org/10.1021/acs.chemmater.0c00223

Abstract

The carrier type of 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 photo-voltage spectroscopy showed material synthesized from Sb2Se3 granulate mate-rial 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 con-firmed by synthesis of intrinsic crystals from metallic precursors and subsequent 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 of 7.3% efficiency based are demonstrated with band alignment analyzed via XPS.

Item Type: Article
Subjects: F100 Chemistry
F200 Materials Science
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 06 Mar 2020 11:09
Last Modified: 06 Mar 2020 11:15
URI: http://nrl.northumbria.ac.uk/id/eprint/42388

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