| 학회 |
한국재료학회 |
| 학술대회 |
2017년 봄 (05/17 ~ 05/19, 목포 현대호텔) |
| 권호 |
23권 1호 |
| 발표분야 |
8. 태양광 물분해 광전극 및 광촉매(Photoelectrode and photocatalyst materials for solar water splitting) |
| 제목 |
Next Generation Photoelectrochemical Cells |
| 초록 |
A photoelectrochemical cell can produce fuels and chemicals at a semiconductor/liquid interface using sunlight. However, a conventional photoelectrode structure has the conversion efficiency limitation due to competition between light absorption and electrolysis performance. In addition, the use of precious metal catalyst is inevitable to obtain high efficiency with the limited amount of catalysts. Here, we propose a new photoelectrode structure which is able to eliminate the coupling between optical and electrochemical properties of photoelectrode. In this work, we form the Ni inverse opal on Au micro-patch array on oxide-passivated Si photoanode. We confirm the relationship between expansion of co-catalyst surface and performance of Si photoanode with Ni I.O as well as also investigate optimum design for use of nano- or micro-structured catalyst on photoelectrode. Our oxide-passivated p+n-Si photoanode with micro-patterned Ni I.O reduced above 120 mV overpotential compared to oxide-passivated p+n-Si photoanode with micro-patterned Ni planar. We also developed the highly efficient Si photoanode with micro-patterned NiFe I.O which produces 31.2 mA/cm2 photocurrent density at 1.23 V vs reversible hydrogen electrode (RHE) in 1 M KOH under a simulated 1 sun illumination. |
| 저자 |
오지훈 |
| 소속 |
한국과학기술원 |
| 키워드 |
<P>PEC; 실리콘; 물분해; 인공광합성</P>
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| E-Mail |
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