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. 2020 Feb 13;11:861. doi: 10.1038/s41467-020-14704-3

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — a Cross-sectional SEM image of TiO₂/CdS/Sb₂Se₃ on Au/FTO substrate. b J–V curves for Sb₂Se₃ photocathodes with/without a CdS layer in pH 1 H₂SO₄ under simulated 1 sun air mass 1.5 G chopped illumination at a scan speed of 5 mV s⁻¹ from positive to negative potential and c corresponding HC-STH efficiencies. d Wavelength-dependent IPCE at 0 V_RHE of Sb₂Se₃ photocathodes with/without CdS layer. Source data used to generate this figure can be found in the Source Data file.