Journal
JOURNAL OF POWER SOURCES
Volume 253, Issue -, Pages 41-47Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2013.12.042
Keywords
SiC; Single crystalline; Photoelectrochemical properties; Photocurrent; Solar energy; Water splitting
Funding
- BMBF Foundation of Germany [03SF0353E]
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The electrochemical properties of single-crystalline p-type 3C-SiC films on p-Si and n-Si substrates were investigated as electrodes in H2SO4 aqueous solutions in dark and under light illumination. The photoelectrochemical measurements with different wavelengths of light sources indicate the p-SiC film on p-Si substrate can generate a cathodic photocurrent as a photocathode, which corresponds to hydrogen production, and generate an anodic photocurrent as a photoanode, which corresponds to oxygen evolution. The photocurrent density on wavelength at different potentials for p-SiC on p-Si was investigated. IPCE measurements were addressed to study the photoactive wavelength regimes for the p-SiC film on p-Si and the p-Si. For p-SiC film on n-Si substrate, it can only generate an apparent photocurrent as a photoanode for oxygen evolution. The analyses on anodic and cathodic photocurrent behaviors of the p-SiC on p-Si and the p-SiC on n-Si as electrodes were proposed. (C) 2013 Elsevier B.V. All rights reserved.
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