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Optimization of Nanostructured Metal Oxide for Solar Energy Harvesting
- Alternative Title
- Il-Han Yoo
- Author(s)
- 유일한
- Alternative Author(s)
- Il-Han Yoo
- Advisor
- 서형탁
- Department
- 일반대학원 에너지시스템학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2020-02
- Language
- eng
- Alternative Abstract
- As human energy demand and consumption increases globally, the problem of environmental pollution caused by the use of traditional fossil fuels is becoming serious. To address this issue, researchers around the world are focusing on developing clean, sustainable and renewable energy. Among many alternative energy sources, renewable energy using solar energy is a uniformly distributed energy source in the world and is regarded as a very clean energy without being consumed. The technology for utilizing the solar energy has been studied to convert not only electricity, but also to chemical fuel materials such as hydrocarbons and hydrogen. In particular, the most researched fields are solar cells and photoelectrochemical water splitting technology. However, although two technologies have been studied for a long time since 1954 and 1972, respectively, they are still in need of improvement in terms of efficiency and stability to be commercially available. Various structures and materials have been tried to improve this, and considerable research is still needed. In this study, metal oxides were fabricated into nanostructures and applied to solar cells and photoelectrochemical cells, and the solar conversion efficiency were effectively increased by optimizing each application using strategies such as heterojunction and doping. In addition, the electronic band structure was investigated through various spectroscopic (including X-ray photoelectron spectroscopy and ultraviolet-visible spectroscopy) and electronic analysis, and the mechanism for increasing the efficiency of the nanostructured cell was analyzed. Through this mechanism analysis, we have proposed general guidelines that can be applied to various oxide materials for effectively increasing efficiency.
- Fulltext
- Appears in Collections:
- Graduate School of Ajou University > Department of Energy Systems > 4. Theses(Ph.D)
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