Title page for etd-0708111-165140


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URN etd-0708111-165140
Author Yen-chen Shih
Author's Email Address No Public.
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Department Electro-Optical Engineering
Year 2010
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Preparation and Characterization of Hierarchical Structured TiO2 Photoanode for Dye-Sensitized Solar Cells
Date of Defense 2011-06-22
Page Count 95
Keyword
  • TiO2
  • Hierarchical structure
  • Photoanode
  • Dye-sensitized solar cell
  • Light scattering
  • Abstract In this research, hills-like hierarchical structured TiO2 photoanodes for dye-sensitized solar cells (DSSCs) have been prepared. We expected these appropriately aggregated TiO2 clusters in photoanode layer could cause stronger light scattering and higher dye loading that increased efficiency of photovoltaics. For detailed light-harvesting study, different molecular weight of polyvinyl alcohol (PVA) polymers were used as binders for TiO2 nanoparticles (P-25 Degussa) aggregation. After preparing a series of TiO2 films with dissimilar morphology, the reflection of TiO2 films, absorbance of attached dye, amount of dye loading, and performance of fabricated DSSC devices were measured and investigated. An optimized device had higher dye loading and well light harvesting at the same time that induced a 23% increase of short-circuit current Jsc in DSSCs. Moreover, we found that electrolyte could penetrate or diffuse easily in this higher porous structure. We fabricated dye-sensitized solar cells with MPN-based liquid electrolyte and gel polymer electrolyte. From this structure, the short-circuit current Jsc was increased around 16% and 19% respectively compared to conventional layers with liquid electrolyte and gel polymer electrolyte devices. The increase in highly viscous system of gel polymer electrolyte is due to easier penetration by such hills-like hierarchical structure.
    Advisory Committee
  • Mei-Ying Chang - chair
  • Yu-Kai Han - co-chair
  • Li-Yin Chen - co-chair
  • Wen-Jun Zheng - co-chair
  • Wen-Yao Huang - advisor
  • Files
  • etd-0708111-165140.pdf
  • indicate in-campus access immediately and off_campus access in a year
    Date of Submission 2011-07-08

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