本實驗以Sol-gel method製備TiO2薄膜電極，以含不同中間金屬以及外緣取代基的Porphyrin及Phthalocyanine(Pc)製作染料敏化太陽能電池，以探討染料對於能量轉換效率的影響，並利用UV/vis、action spectrum、及交流阻抗法分析其影響。
在染料篩選部份，我們發現具有-COOH之染料之轉換效率較高，其中以含兩個-COOH取代基的染料較四個-COOH取代基的染料好；不管是Porphyrin還是Phthalocyanine，中間金屬效應都以Zn最佳。
在TiO2厚度的影響方面，N-3 dye染料敏化太陽能電池之效率於TiO2厚度達9μm以上時呈現定值，Pp-IX敏化太陽能電池之效率則在6μm時達最大值，ZnP-IX敏化太陽能電池之效率約至4~5μm以上呈現定值。
N-3 dye於TiO2薄膜厚度為10μm時，光電轉換效率為4%；Pp-IX於 TiO2薄膜厚度為6μm時，效率為1.28%； ZnP-IX於TiO2薄膜厚度為9μm時，效率為1.7%。
以交流阻抗分析染料敏化太陽能電池發現，各染料於其TiO2最適厚度下，R2值均最小，與光電轉換效率結果相吻合；另外此結果亦顯示，R2不僅僅與TiO2之厚度有關，也跟TiO2上之染料有關，所以可將R2視為染料敏化TiO2後之阻抗。

In this thesis, we study the dye-sensitized solar cells (DSSC) based on TiO2 and using porphyrin and phthalocyanine (Pc) dyes. The TiO2 films are deposited by the sol-gel method. The effects of central metal and substituent of porphyrins and phthalocyanines on the DSSC conversion efficiency are discussed. Action spectra and electrochemical impedance spectroscopy (EIS) data are also presented.

For the central metal effect, we found that Zn is the best, among all porphyrin and phthalocyanine pairs with the same substituents. For the substituent effect, we found that -COOH is essential for good conversion efficiency, while the di-substituted dyes are better than the tetra-substituted ones.

The conversion efficicency increase with the TiO2 thickness. While the maximum efficiency is reached at 9μm for the N-3 dye-sensitized. DSSC, that limit thickness is 6μm for the Pp-IX sensitized DSSC, and 4~5μm for the ZnP-IX sensitized DSSC. The conversion efficiency is 4% for the N-3 dye DSSC, 1.28% for the Pp-IX DSSC, and 1.7% for the ZnP-IX DSSC.

EIS results show that the R2 value decreases as the TiO2 thickness increases. EIS data also show that R2 is related not only to the thickness of TiO2 but also to the dye absorbed on TiO2.

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