| 학회 |
한국공업화학회 |
| 학술대회 |
2015년 봄 (04/29 ~ 05/01, BEXCO (부산)) |
| 권호 |
19권 1호 |
| 발표분야 |
고분자_포스터 |
| 제목 |
Hybrid Hierarchical Nanostructures for Alternative Electrodes in Dye-Sensitized Solar Cells |
| 초록 |
The electrode in dye-sensitized solar cells (DSSCs) demands high porosity and surface area so that the sensitizers can be sufficiently adsorbed and the paths for electron transport can be electronically interconnected. Highly ordered hierarchical mesoporous TiO2 networks can provide fast electron transport paths, and ordered mesopores can enhance light scattering, facilitate infiltration of the electrolyte, and ultimately increase the power conversion efficiency. In this work, we investigated the formation of hierarchical mesoporous TiO2 and carbon-TiO2 nanostructures and their application as photoanode in DSSCs. Those structures were fabricated by using polystyrene beads for SiO2 inverse opal template, and infiltration of a common solution consisting of amphiphilic triblock copolymer (P123) and TiO2 sol-gel precursors. A commercially available triblock copolymer Pluronic P123 played key role in the generation of nanovoids within the hierarchical mesoporous TiO2 opal and also as a carbon source. Mesoporous carbon-TiO2 opal is fabricated via sequential UV-stabilization and calcination of P123 containing TiO2 precursors and their performance as electrode was compared with carbon-free analogues. The changes in photovoltaic performances were monitored by controlling the loaded amount of mesoporous TiO2 opals and carbon-TiO2 opals. It was observed that the incorporation of mesoporous carbon-TiO2 opals into the conventional photoanode of DSSCs can enhance the charge transport and collection that lead to enhanced photovoltaic performance by ~25.78 %. |
| 저자 |
Li Na Quan, 장윤희, 장유진, 김지현, 김동하
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| 소속 |
이화여자대 |
| 키워드 |
Dye-Sensitized Solar Cell; Inverse Opal; Mesoporous Carbon
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| E-Mail |
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