3D結構之二氧化鈦工作電極對染料敏化太陽能電池效能之影響

The Effect of 3D TiO2 electrode on the Performance of Dye-Sensitized solar cells

洪珮凌(Pei-Ling Hung)

指導教授 ： 王宏文

中原大學/理學院/化學研究所/碩士(2011年)

https://doi.org/10.6840/CYCU.2011.00184

摘要

本實驗以電泳沉積法製備ITO奈米線陣列，應用於染料敏化太陽能電池之工作電極，製備3D之工作電極可增加表面積以期增加電池之轉換效率。有模板的方式製備ITO奈米線陣列，經過鍛燒移除模板會使ITO奈米線倒塌並互相接觸，繼而造成短路。為了改善短路問題，以陽極氧化法製備TiO¬2奈米管陣列並且通孔作為模板，以電泳沉積的方式在TNA內沉積ITO奈米線。此方法不需要額外移除PC膜或是AAO膜等模板，確保ITO奈米線之間不互相接觸。
利用微波水熱法製備二氧化鈦奈米粉體，添加PEG調整黏度塗於FTO玻璃上作為染敏電池工作電極，比較不同的固含量對於電極表面的平整度與光電轉換效率的差異。以及TiO2薄膜工作電極與3D ITO奈米線工作電極對染敏電池效率之影響並探討其原因。
另一方面以陽極氧化法製備二氧化鈦奈米管陣列，使其與鈦基板分離並通孔，比較開孔與否對轉換效率之影響。並以此為模板電泳沉積ITO奈米線，製備ITO/TiO2核殼結構之3D ITO奈米線工作電極，觀察其染敏電池效率之影響並探討其原因。

關鍵字

二氧化鈦工作電極 ； 3D結構 ； 染料敏化太陽能電池

並列摘要

ITO (indium-tin-oxide) nanowires were synthesized by the electrophoretic deposition method (EPD), acting as the working electrode in DSSC. The 3D electrode enhances the surface area of electron path ways and increases the power conversion efficiency of DSSCs. The ITO nanowires were prepared with template, crystallized by annealing, however, were collapsed after annealing and contacted with each other causing short circuit. To avoid the short circuit, titanium dioxide nanotube arrays (TNA) were employed as the template, with ITO the nanowires grown inside by the EPD process. The TNA was manufactured by anodization process and the bottom of TNA was opened. This method was called the template-free method, which is different from those of PC or AAO membranes template method.
The titanium dioxide (TiO2) nanoparticles were prepared by microwave hydrothermal. Polyethylene glycol (PEG) was added to adjust the viscosity of TiO2 paste. TiO2 paste was printed on FTO glass using doctor-plate as the working electrode of dye-sensitized solar cells. To compare the effect of solid contents of TiO2 paste, the power conversion efficiency of DSSC made by different solid contents were fabricated.
The bottom-opened TNA synthesized by anodization process, ITO/TiO2 core-shell nanotubes, was employed for the photoelectrode of DSSC. The characteristic of template–free synthesized ITO/TiO2 core-shell nanotubes for DSSC were investigated and discussed.

並列關鍵字

TiO2 electrode ； DSSCs ； 3D structure

參考文獻

5.C. J. Lin, W. Y. Yu, S. H. Chien. Transparent electrodes of ordered open-ended TiO2-nanotube arrays for highly efficient dye-sensitized solar cells. J. Mater. Chem. (2010), 20(6), 1073-1077

6.F. Hurd, R. Livingston. The quantum yields of some dye-sensitized photo.ovrddot.oxidations. J. Phys. Chem. (1940), 44 865-73

7.G. Oster, J. S.Bellin, R. W. Kimball, M. E. Schrader, Dye-sensitized photo.ovrddot.oxidation. J. Am. Chem. Soc. (1959), 81 5095-9

8.S. Chaberek, A. Shepp, R. J. Allen. Dye-sensitized photopolymerization processes. I. The thionine-nitrilotripropion amide-acrylamide system. J. Phys. Chem. (1965), 69(2), 641-7

9.S. Chaberek, R. J. Allen. Dye-sensitized photopolymerization processes. II. A comparison of the photoactivities of thionine and methylene blue. J. Phys. Chem. (1965), 69(2), 647-56