کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1287110 | 1497979 | 2014 | 7 صفحه PDF | دانلود رایگان |
• p-SiC film on p-Si substrate as a photocathode can generate appreciable cathodic photocurrent.
• p-SiC film on p-Si substrate as a photoanode also can generate weak anodic photocurrent.
• p-SiC film on n-Si substrate can only generate obvious anodic photocurrent.
• The dual photocurrent behaviors of p–p structure were investigated and proposed.
• No other groups reported such dual photocurrent behaviors of p–p structure.
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.
Journal: Journal of Power Sources - Volume 253, 1 May 2014, Pages 41–47