二氧化鈦多孔性薄膜是染料敏化太陽能電池的核心部分，本研究使用三種不同的二氧化鈦顆粒構成二氧化鈦多孔性薄膜，分別是市售Degussa P25，粒徑與P25相近平均粒徑為35nm與平均粒徑較小18nm具銳鈦礦晶型的二種二氧化鈦奈米顆粒，堆積成多孔性薄膜製備染料敏化太陽能電池並測量其光照下電池發電效率。與P25粒徑相近自行合成Anatase顆粒由於其純的Anatase晶型有較良好的發電效率，分別是5.5%與6.5%。由平均粒徑18nm顆粒沉積為多孔性薄膜的電池發電效率6.0%。改變電解質溶劑的種類，探討其對於太陽能電池發電效率的影響，發現較低黏度的Acetonitrile有最好的表現。添加分散良好的棒狀二氧化鈦在由顆粒構成的二氧化鈦多孔性薄膜以幫助導電，並提高電池發電效率。由棒狀二氧化鈦與平均粒徑18nm二氧化鈦顆粒以8：2重量比混摻構成二氧化鈦薄膜所製備之電池有最高的發電效率7.6%。

Nanoporous TiO2 layer is the core in Dye-Sensitised Solar Cell. In this research we use three different kinds of TiO2 particle to deposit nanoporous TiO2 film and measure their efficiencies under light illumination. The used particles are commercial available Degussa P25 TiO2, pure anatase structure particle with a similar particle size (35nm) to P25, and a smaller particle size (18nm) anatase particle. The cell made by 35 nm anatase particle gives a higher efficiency than P25 cell (6.5 % and 5.5 %) due to pure anatase structure. Cell with smaller particles have an efficiency of 6.0 %. We also try four different solvent in electrolyte. Acetonitrile has the lowest viscosity, and can give the best cell performance. Mixing TiO2 Rod in nanoparticle film can enhance the electron transport. The cell with a TiO2 mixture of 20 wt% rod and 80 wt% particles in a size of 18 nm can give the best efficiency of 7.6 %.

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