小分子凝膠化合物之製備與應用於膠態染料敏化太陽能電池之研究

Preparation of Low Molecular Weight Gelators and Their Application in Quasi-Solid State Dye Sensitized Solar Cells

許明芳(Ming-Fang Hsu)

指導教授 ： 趙豫州

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2011年)

https://doi.org/10.6841/NTUT.2011.00119

摘要

過去DSSC之研究係以純液態電解質的效率最高可達11% ，但是液態電解質中有機溶劑的揮發所造成之洩漏加上碘對封裝材料的腐蝕，使得光電轉換效率無法維持長久，目前尚無良好的封裝技術可解決此洩漏問題，於是開啟了半固態與固態電解質之研究。
本研究製備多種單取代、雙取代與三胺纇之分子凝膠化合物稱之為 gelator，這些gelator具有膠化液態電解質之特性。將gelator加入到液態電解質中經加熱攪拌溶解後在冷卻至室溫，即形成膠態電解質。這些膠態電解質具熱可逆性質，於室溫下為膠態；而升溫至60~90℃則為液態。本研究發現就穩定度而言有添加gelator的電池較佳，其中三胺gelator較單、雙取代gelator之光電轉換效率維持度更佳，於85℃至少可維持一個月以上電解質無洩漏。於擴散係數之研究也發現含三胺類gelator之電解質其碘三離子擴散係數與液態電解質一樣好。溫度老化實驗則以電化學阻抗分析儀( Electrochemical impedance spectroscopy, EIS)了解電池各界面之阻抗變化，協助判斷電子之傳遞是否受老化影響。

關鍵字

膠態電解質 ； 染料敏化太陽能電池

並列摘要

The dye-sensitized solar cells (DSSCs) provide a promising alternative concept to conventional photovoltaic devices. However, liquid-state DSSCs possess the problem of low stability since the volatile liquid electrolyte. One of effective approach to solve such a problem is replacing the volatile liquid electrolyte with solid-state or quasi solid-state electrolyte.
In this thesis, provides a gelator which has three amide groups can form a gel form of the liquid electrolyte in dye-sensitized solar cells to inhibit the volatilization and leakage of liquid electrolytes to increase the service life of the cell. In order to learn more about gelators, we electrochemically characterized these gel electrolytes and measured diffusion coefficients of triiodide. Electrochemical impedance spectroscopy (EIS) has been performed to investigate electronic and ionic processes also in this study.

並列關鍵字

quasi-solid state electrolyte ； DSSC

參考文獻

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