利用奈米薄膜提升染料敏化太陽電池光電轉換效率之研究

An Investigation on Increasing Photoelectric Conversion Efficiency of Dye-Sensitized Solar Cell with Nanostructured Thin Film

本論文係提出具體且有效的方法，包括增加二氧化鈦薄膜厚度、增加銀反射膜及增加散射層等三項要素。結果顯示，單從二氧化鈦薄膜層數來看，電極厚度越厚則電池光電轉換效率將會越高，最高可達ç = 5.94%；若配合銀反射膜的使用，則光電轉換效率將會再提升，最高可增加到ç = 6.44%；然而增加散射層 （4.5 ìm） 之後，光電轉換效率會提升至ç = 7.04%。研究結果顯示，增加二氧化鈦薄膜厚度、銀反射膜及散射層等三項要素，均能有效的提升染料敏化太陽電池的光電轉換效率，而且都是在低成本情況下即可達成。

This study developed highly efficient dye-sensitized solar cells (DSSCs)through fabrication with nanostructured thin film. The photoelectric conversionefficiency of DSSC could be improved by fabricating the titaniumdioxide (TiO2) film, Ag reflection film, and scattering layer. From theresults, the conversion efficiency increases with the increase of nano-TiO2electrode thickness, which is up to 5.94%. As DSSC was fabricated withan Ag reflection film, the photoelectric conversion efficiency was up to6.44%. On the other hand, the best photoelectric conversion efficiency of7.04% was obtained using the fabrication with 4.5 μm scattering layer.DSSCs fabricated using the proposed methods can be produced at low cost.