臺灣博碩士論文加值系統

本研究用新型有機染料做為染料敏化太陽能電池(DSSC)的吸收層，我們製備三種基於吩噻嗪（PTA）的D-π-A有機染料（TC6PTA，TBOC6PTA和cC6PTA）。我們用三苯胺作為基礎設計出 TC6PTA，再調整共軛結構後設計出TBOC6PTA，最後對電子予體進行調整設計成cC6PTA。
我們經由光學特性的分析，並製作元件以觀察三種染料在DSSC中的實際應用。經元件製作與分析後得知三種染料皆在濃度為0.2mM時有最佳的光電轉換效率，TC6PTA為6.61%、TBOC6PTA為6.02% 以及cC6PTA為6.92%。此外，溶劑特性也會造成光電轉換效率，結果顯示TC6PTA在乙醇為溶劑時，其光電轉換效率為6.48%、TBOC6PTA溶解於乙腈時光電轉換效率可達6.89%、cC6PTA溶解於乙醇時效率可達6.92%。從效率得知染料分子的設計、濃度與溶劑對於電池效率有很大的影響，染料分子設計可藉由改變電子予體結構與共軛結構進行改善，再搭配合適的濃度與溶劑就可讓元件效率接近常規的N719染料。

This study demonstrated the new organic materials served as the absorption layer in dye-sensitized solar cells (DSSC). we prepared three phenothiazine (PTA)-based D-π-A organic dyes (TC6PTA, TBOC6PTA, and cC6PTA). We designed TC6PTA with triphenylamine as the basic donor unit, then changed the conjugated moiety on the PTA bridged unit, named TBOC6PTA. In addtion, the planarity donor (carbazole) unit was used to replace the triphenylamine, named cC6PTA.
Their optical properties were studied and their practical application in dye-sensitized solar cells was demonstrated. All three dyes had the best power conversion efficiency (PCE) at 0.2 mM , TC6PTA was 6.61%, TBOC6PTA was 6.02%, and cC6PTA was 6.92%. In addition, the solvent effect also affect power conversion efficiency. The results show that TC6PTA has a power conversion efficiency of 6.48% when ethanol is a solvent, the PCE is 6.89% when TBOC6PTA is dissolved in acetonitrile, and when cC6PTA is dissolved in ethanol, the PCE of 6.92% is achieved. We could observed that the device efficiency can be effect by the dye molecule design, different concentration and solvent effect. The molecule design can be optimized by replacing the electron donor unit and the coplanar moiety. The device efficiency could be compared with N719 dye by using suitable concentration and solvent.

誌謝 III
摘要 IV
Abstract V
圖目錄 VIII
表目錄 X
第一章 緒論 1
1-1 前言 1
1-2 染料敏化太陽能電池發展回顧 3
1-3 研究動機 5
第二章 實驗原理與架構 7
2-1 染料敏化太陽能電池之結構 7
2-1-1 透明導電玻璃 (Transparent Conductive Oxide, TCO) 7
2-1-2 工作電極 (Working Electrode) 8
2-1-3 光敏化劑 (Sensitizer) 9
2-1-4 電解液 (Electrolyte) 11
2-1-5 對電極 (Counter Electrode) 12
2-2 染料敏化太陽能電池之工作機制 12
2-3 染料敏化太陽能電池之特性參數與等效電路 14
2-3-1 染料敏化太陽能電池之特性性參數 14
2-3-2 染料敏化太陽能電池之等效電路 17
2-4 染料敏化太陽能電池之有機染料分子設計 18
第三章 實驗流程與製備 21
3-1 實驗耗製程設備 21
3-2 分析系統 22
3-2-1 紫外光/可見光/近紅外光光譜儀 (UV/VIS/NIR Spetrophotometer) 22
3-2-2 光電特性量測 23
3-3 實驗流程與製備 24
3-3-1 玻璃基板清洗 25
3-3-2 TiO2工作電極製備 26
3-3-3 Pt 對電極製備 26
3-3-4 電池組裝與電性量測 27
第四章 結果與討論 28
4-1 有機染料設計概念 28
4-2 染料光學特性量測 30
4-3 染料濃度測試 31
4-4 染料溶劑測試 37
4-5最佳條件參數電性比較 46
第五章 結論 49
參考文獻 52

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