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Abstract
The carrier-type of the emerging photovoltaic Sb 2Se 3 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 Sb 2Se 3 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 MgCl 2. Chlorine was also shown to be a substitutional n-type shallow dopant by density functional theory calculations. TiO 2/Sb 2Se 3 n-n isotype heterojunction solar cells with 7.3% efficiency are subsequently demonstrated, with band alignment analyzed via XPS.
Original language | English |
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Pages (from-to) | 2621-2630 |
Number of pages | 10 |
Journal | Chemistry of Materials |
Volume | 32 |
Issue number | 6 |
Early online date | 3 Mar 2020 |
DOIs | |
Publication status | Published - 3 Mar 2020 |
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Dive into the research topics of 'Isotype heterojunction solar cells using n-type Sb2Se3 thin films'. Together they form a unique fingerprint.Projects
- 1 Finished
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CZTSSe solar cells from nanoparticle inks
Zoppi, G. (PI)
Engineering and Physical Sciences Research Council
1/04/16 → 31/03/18
Project: Research