有機高分子材料改質及其在染料敏化太陽能電池的應用

Modification of Organic Polymer Stuff in the Dye-Sensitized Solar Cell

高振凱(Chen-Kai Kao)

指導教授 ： 段葉芳

國立臺北科技大學/工程學院/化學工程研究所/碩士(2009年)

摘要

本研究主要是以改善染料敏化太陽能電池元件中液態電解質容易洩漏的缺失，而提高在染料敏化太陽能電池應用上的長期穩定性。
在工作電極方面，首先以TiO2粉末(P25)添加Polyethylene glycol (Mw = 6000，PEG) 旋轉塗佈工作電極，找出表面最佳化條件。再來探討含有硫的聚苯胺摻雜在TiO2薄膜中對染料敏化太陽能電池的影響。在電解質方面，以PEO作為膠態電解質可以改善液態電解質容易洩漏的缺點，並探討不同比例的PEO在電解質中的影響。在封裝過程中如果產生水氣則會加速TiO2的光觸媒裂解效應，而染料就無法發揮預期的效率。所以在膠態電解質中加入防水的Polypropylene oxide (Mw = 2000，PPO)寡聚物，並加以合成改質修飾。經由NMR、FT-IR、TGA、SEM、XRD、白光干涉儀、流變儀、CV等儀器進行化學性質和物理性質的分析；最後加入在染料敏化太陽能電池的膠態電解質中，進行效率的測試；最後模擬太陽光系統，進行效率測試。
經由效率的測試後，TiO2工作電極經過兩次鍛燒可得到最高的效率，膜厚為15um；液態電解質中添加15%的PEO作為膠態電解質有最高的效率。在膠態電解質中添加10%的寡聚物PPO-COOH有最高的效率。

關鍵字

染料敏化太陽能電池 ； 電解質 ； PEO ； PPO

並列摘要

This research is to improve the imperfection of Dye-sensitized solar cells (DSSC), which the liquid electrolyte easily leaked out form the component of cell, and raising the long-term stability of the application in DSSC.
For the working electrode, first, add PEG into TiO2 powder and spin coating on working electrode, find out the best condition of it. Secondly, study the influence of using Poly(aniline-co-N-propanesulfonic acid aniline) in the TiO2 films on DSSC. For the electrolyte, first, using PEO as quis-electrolyte which can improve the imperfection, that the liquid electrolyte easily leaked out, and studying the influence of different ratios of PEO in the liquid electrolyte. If it has moisture, it would accelerate the effect of the phocatalyst of TiO2 in the fabrication process and then the dye can not develop to the expectative efficiency. To prevent this, I add water-repellent oligomer Polypropylene oxide into the qusi-electrolyte to modify its quality. Finally, I use a lot of apparatus to analyze its chemistry and physical properties which include NMR, TGA, SEM, XRD, White light Interferometers, Parallel-plate Rheometer and Cyclic Voltammetry. Finally, I imitate the system of the sun optic to test its efficiency.
After testing the efficiency, TiO2 working electrode, 15um, that can obtain the best efficiency after two time calcined. When adding 15% PEO as qusi-electrolyte in the liquid electrolyte, adding 5% oligomer PPO in qusi-electrolyte can obtain the best efficiency. Oligomer PPO is modifying by synthesis can acquire PPO-COOH which has the best efficiency.

並列關鍵字

Dye-sensitized solar cells ； electrolyte ； PEO ； PPO

參考文獻

[4] M. Grätzel, J. Photochem, Photobio. A., no.164, 2004 , pp.3.

[7] Cahen et al., J.Phys.Chem. B, no.104, 2000, pp.2053–2059.

[8] A. Fujishima et al., Sol. Energy Mater. Sol. Cells, no.81, 2004, pp.197–203.

[10] L. Brus, Phys. Rev. B﹐no.53, 1996, pp.4649–4656.

[11] Cahen et al., J. Phys. Chem. B, no.104, 2000, pp.2053–2059.