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. 2016 Dec 14;7:13380. doi: 10.1038/ncomms13380

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Copyright © 2016, The Author(s)

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(a) Scheme of a tandem cell with a HDP (BiVO₄||Fe₂O₃) and parallel-connected Si solar cells (2p c-Si), (b) artificial leaf (monolithic tandem cell) in action under illumination with real sunlight (details in Supplementary Movie 2) (c) Two-electrode AM 1.5 I–V curves for photoanodes of BiVO₄, Fe₂O₃, BiVO₄||Fe₂O₃ and with a 2p c-Si solar cell behind each photoelectrode. (d) Stability of unbiased water splitting (0.0 V versus counter electrode). The small inset shows data recorded for short term (during stabilization of the tandem cell). Photoanodes were NiOOH/FeOOH/H, 1% Mo:BiVO₄ and Ni₂FeO_x/H, TiO₂/0.5% Ti:Fe₂O₃. All data were collected in an electrolyte of 1.0 M KCi, pH=9.2.