Black Silicon Photoanodes Entirely Prepared with Abundant Materials by Low-Cost Wet Methods

K. Oh 1 L. Joanny 1 F. Gouttefangeas 1 B. Fabre 1 V. Dorcet 1 B. Lassalle-Kaiser 2 A. Vacher 1 Cristelle Mériadec 3 S. Ababou-Girard 3 G. Loget 1
1 ISCR - Institut des Sciences Chimiques de Rennes
2 ESRF - European Synchrotron Radiation Facility
3 IPR - Institut de Physique de Rennes
Abstract : We report a new design for water-splitting photoanodes, based on a highly absorbing black silicon (BSi) substrate modified with catalytic metal nanoparticles (NPs). The overall fabrication strategy is cost-efficient as it only requires the use of abundant materials and simple wet procedures such as electrochemical etching and electrodeposition and does not involve the use of a buried homojunction and protection layer. Importantly, these results demonstrate that electrodeposited transition metal NPs can stabilize structured Si photo electrodes without the need for a protection layer.
Keywords : oxygen evolution reaction nickel silicon iron solar energy conversion
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Submitted on : Monday, April 15, 2019 - 11:16:29 AM
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K. Oh, L. Joanny, F. Gouttefangeas, B. Fabre, V. Dorcet, et al.. Black Silicon Photoanodes Entirely Prepared with Abundant Materials by Low-Cost Wet Methods. ACS Applied Energy Materials, ACS, 2019, 2 (2), pp.1006-1010. ⟨10.1021/acsaem.8b02229⟩. ⟨hal-02086216⟩

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