| Budget Amount *help |
¥15,730,000 (Direct Cost: ¥12,100,000、Indirect Cost: ¥3,630,000)
Fiscal Year 2017: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2016: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2015: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
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| Outline of Final Research Achievements |
Photoelectrodes of iron oxides were fabricated towards the high-efficiency solar water splitting. First we fabricated the photocathodes based on the wide gap semiconductor Si:FeO. We successfully suppress the partial oxidation of Fe ions at the surface of the electrode by depositing an insulating Ga2O3 layer on the Si:FeO. As a result, photocurrent was observed in the ultraviolet region in the Ga2O3/Si:FeO photocathode. Next, we fabricated Si:Fe2O3 photoelectrodes using a two-step pulsed laser deposition. The photocurrent was observed in the visible and near infrared regions which was further enhanced by the effect of localized surface plasmon. Moreover, we successfully fabricated V-substituted Fe2O3-based photoelectrodes which showed near infrared photocurrent and IPCE of approximately 11%.
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