本研究主要目的是改善染料敏化太陽能電池的前處理方式，形成能有效抑制光電極上電子與鈷錯合物電解質發生再結合的緻密層，以及將接觸式結構應用於染敏電池中，來提升元件之光電轉換效率。在前處理上使用TiCl4浸泡法以及TiAcAc噴霧法作比較，發現噴霧法所製作出來的元件具有較高的光電轉換效率，並且於SEM影像中可以觀察到浸泡法會於FTO玻璃表面形成分散的TiO2晶粒，而噴霧法處理則具有較均勻且平整之緻密層，考量到浸泡法之元件具有較高的開路電壓，因此後續使用的兩步驟前處理先將FTO玻璃表面進行浸泡法處理，再於其上進行噴霧，最終結果使效率從8.1%提升至8.42%，並且於SEM影像中可以觀察到兩步法之緻密層比起只使用噴霧法還要來的平整。而接觸式元件的引入則會使元件之短路電流提升及開路電壓下降，起初只使用噴霧法進行前處理之接觸是元件效率為6.64%，後續將後處理、兩步法前處理以及PEDOT對電極應用於此結構中，最終效率提升至9.43 %，而同樣處理條件之分離式元件較率為8.96%，兩者電流分別為16.02 mAcm-2及13.87 mAcm-2，顯示出接觸式元件因較高的電流而有更佳的效率。

In this study, a new pre-treatment process has been developed that effectively inhibits the occurrence of recombination reactions and, when combined with a contact-type structure, efficiently enhances the device efficiency. The traditional TiCl4 soaking method could not completely cover the surface of the substrate. The TiAcAc spray method, while capable of achieving a complete and dense layer, experiences variations in uniformity based on the substrate surface roughness. Additionally, if the layer is too thick, it may increase the series resistance of the components. In order to obtain a smoother layer, the approach involves first applying the TiCl4 soaking method to produce TiO2 particles on the substrate, followed by spraying TiAcAc to achieve the blocking layer. Under one sun illumination (100mW/cm2), using the two-step method can achieve an efficiency of 8.59%, while the spray method only reaches 8.37%.
Subsequently, using the direct contact structure to enhance the current density of the device, it was found that by using only the spray method for pre-treatment, the efficiency is 8.39%. However, with the two-step method, the efficiency is increased to 8.96%. The speculation is that the use of a contact-type structure leads to an increase in the contact area between the electrolyte and the substrate, and the two-step method is advantageous in forming a uniform and dense layer over a larger area, which results in a significant improvement in efficiency. In EIS analysis, a significant increase in recombination resistance can also be observed. Finally, by replacing the electrode material with PEDOT, the efficiency can reach 9.43%.

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