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研究生： 李怡葶
Yi-ting Lee
論文名稱： 含螺旋芴雙噻吩有機染料應用於染料敏化太陽能電池
Spirofluorenebithiophene containing organic dyes for DSSCs
指導教授： 吳春桂
Chun-guey Wu
陳錦地
Chin-ti Chen
口試委員:
學位類別： 碩士
Master
系所名稱： 理學院 - 化學學系
Department of Chemistry
畢業學年度： 97
語文別： 中文
論文頁數： 145
中文關鍵詞： 染料敏化太陽能電池
外文關鍵詞： Dye Sensitized Solar Cell
相關次數： 點閱：15  下載：0 
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    • 本實驗主要是合成新的有機染料以spiro[cyclopenta[2,1-b:3,4-b’] dithiophene-4,9’- fluorene]為分子結構中間之架橋(spacer)，分別以diphenylamine、bis(4-methoxyphenyl)amine和carbazol作為推電子基，cyanoacrylic acid為拉電子基。並分別用核磁共振光譜儀(NMR)、質譜儀鑑定化合物之結構；紫外/可見光光譜儀、螢光光譜儀鑑定化合物之吸收、放光波長及染料在溶劑中之穩定度；由循環電位儀計算得知化合物之HOMO、LUMO值；並將染料製作染料敏化太陽能電池(dye - sensitized solar cells，DSSCs)探討其光電轉換效率。其中以carbazol為推電子基之spirofluorenebithiophene染料所製作之染料敏化太陽能電池，在AM 1.5太陽光(100 mW/cm2)照射下，其光電轉換效率(η)為3.4 %，短路電流(Jsc) 8.65 mA cm-2；開路電壓(Voc) 0.57 V；fill factor (FF) 0.70。
    實驗結果顯示，有螺旋結構π共軛架橋，染料光穩定度顯著提昇，染料的吸收波長較長、消光係數亦增加，但螺旋的立體障礙結構大幅降低染料在二氧化鈦表面之覆蓋率，是造成所製作的太陽能電池光電轉換效率不及沒有螺旋結構染料之染料敏化太陽能電池的原因。

    New organic dyes that contain spiro [cyclopenta[2,1-b:3,4-b''] dithiophene-4,9''-fluorene] conjugate spacer between arylamine donor (diphenylamine, bis(4-methoxyphenyl) amine and carbazol) and the cyanoacrylic acid acceptor have been synthesized. These compounds are characterized by 1H NMR, 13C NMR, mass spectrometry, UV / visible spectrometer, fluorescent spectrometer and cyclic voltametry in the estimation of HOMO and LUMO energy levels.
    These dyes were developed as the sensitizers for the application in dye-sensitized TiO2 nanocrystalline solar sells (DSSCs). A power conversion efficiency (ηPCE) of 3.4 % was determined with the DSSC based on 6-(5-(4-(9H-carbazol-9-yl)phenyl)thiophen-6-yl)spiro[cyclopenta[2,1-b:3,4-b’]dithiophene-4,9’-fluorene]-2-cyanoacrylic acid (SCZ) under simulated AM 1.5 G irradiation (100 mW / cm2): short-circuit current density (Jsc) of 8.65 mA cm-2; open-circuit voltage (Voc) of 0.57 V; fill factor (FF) of 0.70.
    The experimental results show that the DSSC dyes possess spirofluorenyl group enhance the photo-stability, molar extinction coefficient, and the red-shifting of UV-visible absorption wavelength. Nevertheless, compared with the bithiophene centered DSSC dyes, the steric hindrance of the spirofluorenyl group impedes the dye adsorption on TiO2 and hence decrease the power conversion efficiency of DSSCs.

    目錄 中文摘要……………………………………...……….………………………i 英文摘要……………………………………………………...………………ii 謝誌………………………………………………………………………..…iii 目錄………………………………..…………………………………………iv 圖目錄…………………………………………….…………………...….….vi 表目錄…………………………………………….……...………...……….viii 第一章 緒論 1-1前言……………………………………………….………………..….1 1-2太陽能電池種類…………………………………………………...….2 1-2-1矽太陽能電池…………………………………………………...3 1-2-2無機化合物半導體太陽能電池………………………………...6 1-2-3有機化合物太陽能電池………………………………...............8 1-3染料敏化太陽能電池的組成結構…………………………………...11 1-4染料敏化太陽能電池工作原理……………………………………...14 1-4-1太陽電池總效率的計算………………………………………..17 1-5光敏化劑…………………………………………………………...…20 1-5-1含金屬錯合物之光敏化劑…………………………………......22 1-5-2不含金屬有機染料…………………………………...………...26 1-6研究動機…………………………………...……………………………………35 第二章 實驗 2-1 藥品……………………………………………………………….....37 2-2 溶劑之前處理……………………………………………………….39 2-3 實驗儀器…………………………………………………………….39 2-4 合成部分…………………………………………………………….43 第三章 結果與討論 3-1 合成與討論………………………………………………………….69 3-2測量染料吸收和螢光光譜之相關探討…………………………......72 3-2-1吸收、螢光波長及莫耳消光係數…………………………….73 3-2-2染料在二氧化鈦上吸附情形…………………………………...….76 3-2-3染料分子之穩定度…………………………………...………………78 3-3 電化學之測量…………………………………...……………………………82 3-4 DSSC元件…………………………………………………………...88 第四章 結論………………………………………………...………………92 參考文獻………………………………………………………...…………..93 附錄一、化合物鑑定圖譜…………………………………...………………………97

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