染料敏化太陽能電池(Dye-sensitized Solar Cells, DSCs)的戶外應用長期受限於含有高揮發性有機溶劑之液態電解質的漏液與封裝問題。近年來，具高導電度、非揮發性與高熱穩定性之咪唑類(Imidazolium)室溫離子液體，被認為可用以取代一般液態電解質所使用之有機溶劑，得到更穩定的液態電解質。然而，離子液體的高黏度導致電解質中離子移動效率變差，因而降低導電度與DSCs元件之效率。在高黏度離子液體中摻入含惰性陰離子的低黏度離子液體所製得之無溶劑雙離子液體電解質，雖可大幅改善導電度，但對於漏液與封裝問題，仍需要低流動性電解質才可有效解決。本論文主要研究於無溶劑雙離子液體電解質中混摻入二氧化矽(SiO2)奈米顆粒，製備無溶劑奈米粒子型半固態電解質，期望藉由奈米顆粒的添加進一步改善無溶劑電解質之離子傳導機制，在降低電解質流動性的同時，亦可有效提升溶劑DSCs元件之光電轉換效率。
實驗結果顯示，在入射光強度為100mW/cm2 的照射下，相較於未加入任何奈米顆粒時之光電轉換效率(2.86%)，當SiO2奈米粒子於PMII/EMIDCA離子液體中添加量達2wt% 時，光電轉換效率可達 5.28 %，短路電流密度(Jsc)更由7.26mAcm−2大幅提升至12.46mAcm−2。電化學阻抗分析(EIS)顯示，SiO2奈米粒子的添加可有效降低無溶劑電解質與鉑對電極間的界面阻抗，進而提升Jsc。長效性能測試方面，添加2wt% SiO2奈米顆粒之無溶劑半固態電解質元件於60℃暗室下放置1000小時，其光電轉換效率仍維持初始效率之80%。

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