Isotype Heterojunction Solar Cells Using n-Type Sb2Se3 Thin Films

Theodore D.C. Hobson; Laurie J. Phillips; Oliver S. Hutter; Huw Shiel; Jack E.N. Swallow; Christopher N. Savory; Pabitra K. Nayak; Silvia Mariotti; Bhaskar Das; Leon Bowen; Leanne A.H. Jones; Thomas J. Featherstone; Matthew J. Smiles; Mark A. Farnworth; Guillaume Zoppi; Pardeep K. Thakur; Tien Lin Lee; Henry J. Snaith; Chris Leighton; David O. Scanlon; Vinod R. Dhanak; Ken Durose; Tim D. Veal; Jonathan D. Major

doi:10.1021/acs.chemmater.0c00223

Isotype Heterojunction Solar Cells Using n-Type Sb₂Se₃ Thin Films

Theodore D.C. Hobson, Laurie J. Phillips, Oliver S. Hutter, Huw Shiel, Jack E.N. Swallow, Christopher N. Savory, Pabitra K. Nayak, Silvia Mariotti, Bhaskar Das, Leon Bowen, Leanne A.H. Jones, Thomas J. Featherstone, Matthew J. Smiles, Mark A. Farnworth, Guillaume Zoppi, Pardeep K. Thakur, Tien Lin Lee, Henry J. Snaith, Chris Leighton, David O. ScanlonVinod R. Dhanak, Ken Durose, Tim D. Veal, Jonathan D. Major

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

78 Scopus citations

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.

Original language	English (US)
Pages (from-to)	2621-2630
Number of pages	10
Journal	Chemistry of Materials
Volume	32
Issue number	6
DOIs	https://doi.org/10.1021/acs.chemmater.0c00223
State	Published - Mar 24 2020

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Publisher Copyright:
© 2020 American Chemical Society.

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Hobson, T. D. C., Phillips, L. J., Hutter, O. S., Shiel, H., Swallow, J. E. N., Savory, C. N., Nayak, P. K., Mariotti, S., Das, B., Bowen, L., Jones, L. A. H., Featherstone, T. J., Smiles, M. J., Farnworth, M. A., Zoppi, G., Thakur, P. K., Lee, T. L., Snaith, H. J., Leighton, C., ... Major, J. D. (2020). Isotype Heterojunction Solar Cells Using n-Type Sb₂Se₃ Thin Films. Chemistry of Materials, 32(6), 2621-2630. https://doi.org/10.1021/acs.chemmater.0c00223

Hobson, TDC, Phillips, LJ, Hutter, OS, Shiel, H, Swallow, JEN, Savory, CN, Nayak, PK, Mariotti, S, Das, B, Bowen, L, Jones, LAH, Featherstone, TJ, Smiles, MJ, Farnworth, MA, Zoppi, G, Thakur, PK, Lee, TL, Snaith, HJ, Leighton, C, Scanlon, DO, Dhanak, VR, Durose, K, Veal, TD & Major, JD 2020, 'Isotype Heterojunction Solar Cells Using n-Type Sb₂Se₃ Thin Films', Chemistry of Materials, vol. 32, no. 6, pp. 2621-2630. https://doi.org/10.1021/acs.chemmater.0c00223

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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.",

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AU - Featherstone, Thomas J.

AU - Smiles, Matthew J.

AU - Farnworth, Mark A.

AU - Zoppi, Guillaume

AU - Thakur, Pardeep K.

AU - Lee, Tien Lin

AU - Snaith, Henry J.

AU - Leighton, Chris

AU - Scanlon, David O.

AU - Dhanak, Vinod R.

AU - Durose, Ken

AU - Veal, Tim D.

AU - Major, Jonathan D.

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