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. 2018 Oct 11;9:4208. doi: 10.1038/s41467-018-06687-z

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© The Author(s) 2018

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. 3 — Performances of the perovskite solar cell and the PEC tandem configuration. a I–V characteristics of perovskite solar cell under illumination (AM 1.5 G, 100 mW cm⁻²) with (red) and without (blue) BiVO₄ filter. The active area of solar cell was 1 cm². b Overlap of I–V profiles of FeOOH/BiVO₄ photoanode (red) and perovskite solar cell under filtered illumination (black). The intersection of two graphs indicates an operation power of the tandem device. c Linear sweep voltammetry of the tandem device in a two-electrode configuration (i.e., FeOOH/BIVO₄/perovskite and Pt wire). The voltage at zero current density designates the open-circuit voltage of the tandem system under illumination. d Photocurrent density profile of FeOOH/BiVO₄/perovskite solar cell with a two-electrode configuration