臺灣博碩士論文加值系統

本研究在染料敏化太陽電池結構中的染料層使用複合染料，因兩種染料具有不同吸收光譜特性，利用此互補光譜特性可改善太陽電池的光捕獲效率，進而提升電池之光電轉換效率。本研究採用釕金屬染料N719與有機染料SQ2作為染料敏化太陽電池的光敏化劑。在電池製程中，採用超音波處理，可大幅縮短二氧化鈦層吸附染料所需的時間。傳統浸泡法所需時間為8到24小時，而超音波處理約只需20分鍾。本研究又依染料混合及逐步兩種方法分為兩個實驗。
實驗一的研究目的在了解N719及SQ2染料依不同體積比例混合如何影響所製成電池的轉換效率，以獲得最佳之染料體積混合比例，使染料敏化太陽電池具有較佳之光電轉換效率。單獨使用N719及SQ2染料所製成之電池效率分別為3.70%與0.92%。若將兩個染料依不同體積比混合方法，當混合染料(N719+SQ2)之體積比例為6:4時，所製成電池之光電轉換效率可高達4.65%
實驗二之研究目的是了解N719及SQ2染料經逐步式製程對電池效率之影響，並針對二氧化鈦薄膜吸附染料順序與超音波處理時間進行優化。由研究結果可知，在超音波處理時間同樣為10分鐘情形下，讓二氧化鈦薄膜先吸附N719染料，後吸附SQ2染料，結果電池之最佳轉換效率為2.91%；若是讓二氧化鈦薄膜先吸附SQ2染料，後吸附N719染料，則電池之效率只達到2.55%。最後，若超音波處理時間為變數，當二氧化鈦薄膜依序分別浸泡於N719溶液中20分鐘及SQ2溶液中5分鐘，所製成電池之光電轉換效率可高達4.32%。

In this study, the proposed dye-sensitized solar cells use two different types of dyes as the sensitizers of the cells. This co-sensitization can improve the ability of light capture and the conversion efficiency of the cell because each dye has its own absorption spectrum which can be arranged complementary to the other dye. In fact, the co-sensitization technique makes a broader absorption of solar energy to improve the performance of the cell. In this study, N719 and SQ2 are used as the sensitizers of the proposed dye-sensitized solar cells. An ultrasonic treatment is employed during the immersion of the titanium dioxide layer into the dye solution to dramatically reduce the process time, from typically 8-24 hours of immersion down to about 20 minutes. A cocktail approach and a stepwise approach are used to evaluate the performance of the resultant cells.
The cocktail approach is studied to understand how the mixture of N719 and SQ2 dyes in different volume ratios affects the conversion efficiencies of the cells. The optimal conversion efficiency of 4.65% is found for the cell sensitized with the co-sensitizer (N719+SQ2) at the volume ratio of 6:4, which is higher than that of 3.7% for the cell sensitized with N719 dye and that of 0.92% for the cell sensitized with SQ2 dye.
The stepwise approach is studied to understand how the dyeing of N719 and SQ2 in the time sequence on the titanium dioxide layer affects the conversion efficiencies of the cells. The optimization of the time interval for dyeing N719 and SQ2 sequentially on the titanium dioxide layer and the period of time for ultrasonic treatment is included in this study. In the case of dyeing N719 and then SQ2, each under ultrasonic treatment for 10 minutes, the results show that the optimal conversion efficiency of the cell is 2.91%. On the other hand, in the case of dyeing SQ2 and then N719, the conversion efficiency is lower, which is 2.55%. However, when the titanium dioxide film is sequentially immersed in N719 solution for 20 minutes and SQ2 solution for 5 minutes with ultrasonic treatment, the optimal conversion efficiency of the cell is up to 4.32%

中文摘要
Abstract
致謝
目錄
圖目錄
表目錄
第1章 緒論
1.1 染料敏化太陽電池發展
1.2 本實驗室相關研究
1.3 研究動機
1.4 論文架構
第2章 研究方法
2.1 工作原理
2.2 實驗流程
2.2.1 玻璃基板清潔
2.2.2 工作電極製作
2.2.3 染料調配
2.2.4 對電極製備
2.2.5 電解液調配
2.2.6 元件組裝
2.2.7 實驗材料
2.2.8 量測儀器
2.3 實驗規劃
第3章 實驗結果
3.1 混合式複合染料製程對電池特性之影響
3.1.1 單一染料溶於不同溶劑之光吸收度
3.1.2 單一染料使用不同溶劑之電池I-V特性
3.1.3 混合式複合染料溶於不同溶劑之光吸收度
3.1.4 混合式複合染料使用不同溶劑之電池I-V特性
3.1.5 混合式複合染料依不同體積比例混合之光吸收度
3.1.6 混合式複合染料依不同體積比例混合之電池I-V特性
3.1.7 混合式複合染料相關文獻比較
3.2 逐步式複合染料製程對電池特性之影響
3.2.1 逐步式複合染料先後順序對電池特性之影響
3.2.2 單一N719染料敏化太陽電池於不同超音波處理時間之電池特性
3.2.3 SQ2染料於不同超音波處理時間之光吸收度
3.2.4 逐步型複合染料敏化太陽電池於不同超音波處理時間之電池特性
3.2.5 逐步式複合染料相關文獻比較
3.3 結果與討論
第4章 結論與未來研究工作
參考文獻
簡歷表

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