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RISS 인기검색어
- 검색키워드
- 저자 : Sucheol Ju (검색결과 1 건)
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Development of functional structure for photoelectrochemical performance
Sucheol Ju 고려대학교 대학원 2024 국내박사
광전기화학 소자는 반도체 물질이 태양에너지를 흡수하여 여기된 전하들을 이용하여 물을 산소와 수소를 분해하여 수소에너지원을 얻는 친환경에너지 기술이다. 친환경적으로 이상적이나, 상용화되기에는 효율이 낮아 촉매, 도핑, 구조화 등 다양한 연구들이 진행되고 있다. 이 논문에서는 가장 간단하고 강력한 구조화 전략을 사용하여 다기능 구조를 갖는 고효율 광전기화학 소자의 제조공정을 제안하였다. 다양한 공정법에 대한 연구는 다양한 구조 소자 제작을 가능하게 한다. 그렇기에 광전기학학 소자 물질 중 가장 유망한 바나듐산 비스무트를 스퍼터링과 전자빔 증착 공정을 이용하여 합성 및 나노구조체 제작을 진행하였다. 더 나아가 구조화된 투명전극 제작을 통해 광전소자에 적합하며, 효율을 상승시켜 주는 투명전극을 개발하였다. 위의 연구 결과들을 종합하여 다기능 구조를 제작하여 광전기화학 소자의 효율을 향상 및 효과에 대한 분석을 진행하였다. As energy consumption increases with the development of the industry, environmental pollution and global warming are accelerating due to the increase in fossil fuel consumption. Eco-friendly renewable energy is a way to solve these environmental problems while also solving the problem of finite resources. The photoelectrochemical water splitting is a technology that decomposes water using solar energy to obtain a hydrogen energy source and is a zero-CO2 emission green hydrogen technology that does not emit carbon dioxide. Recently, PEC-PSC (photoelectrochemical cells-perovskite solar cells) tandem cells have been studied, which is an advanced form of photoelectrochemical device. It is manufactured in a tandem form with a perovskite solar cell and decomposes water using only solar energy. Transparent electrodes are essential for this PEC-PSC tandem cell type. Although photoelectrochemical water splitting technology has the advantage of being the most ideal eco-friendly energy, it has the limitation of low efficiency yet to be commercialized. To solve these problems, various studies are being conducted on catalysts, doping, pattering, heterostructure, etc. In this work, we proposed various manufacturing processes for high-performance hierarchical structured photoelectrochemical devices using a simple and powerful structuring strategy. The most notable point is the fabrication of the structured FTO (fluorine-doped tin oxide). The structured FTO is a transparent and inexpensive electrode that has the effect of a pattern, so it is an electrode suitable for the energy fields, especially the PEC-PSC tandem cell. To fabricate the structured FTO, direct printing as a patterning technology and mist-CVD as a deposition technology were used. In addition, we studied the fabrication methods of light-absorbing materials such as BiVO4, WO3, and Fe2O3 to fabricate on structured FTO. By combining the results of these studies, highly efficient photoelectrochemical devices with various hierarchical structures were fabricated. The structured FTO proposed in this study offers the potential to increase the efficiency of various photovoltaic devices as well as photoelectrochemical devices. In addition, the high-efficiency hierarchical photoelectrochemical device manufacturing method provides the possibility for commercialization of photoelectrochemical devices while solving the limitations of low efficiency.
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