新穎光敏劑之電化學、電聚合與其應用於染料敏化太陽能電池陰極之研究

Novel Photo-sensitizers and Their Electrochemistry, Electropolymerization, and as Counter Electrodes of Dye-sensitized Solar Cells.

劉佳霖(Chia-Lin Liu)

指導教授 ： 林敬堯

國立暨南國際大學/科技學院/應用化學學系/碩士(2016年)

摘要

我們利用電化學方法探討三個系列的光敏劑。第一個系列探討紫質 (LWP11 ~ LWP14) 修飾上會延伸 π 共軛系統的苯並噻二唑基團。第二個系列為有機光敏劑 (AN-11 ~ AN-14) 修飾上二苯胺或二烷胺的研究。第三個系列為本實驗室的新穎光敏劑─菌綠素 (LS-00、LS-01、LS-03、LS-11、LS-13)，菌綠素擁有比紫質更紅移的吸收峰。
我們也在菌綠素修飾上苯胺取代基，並探討其電聚合反應。實驗結果顯示 LS-03、LS-13 的電聚合和 LS-03、LS-13 與 Di(2An)PDI 共聚合皆能在 Pt、ITO 導電玻璃及 FTO 導電玻璃上聚合成膜，並利用紫外-可見光光譜儀觀察 ITO 導電玻璃與 FTO 導電玻璃上的膜，菌綠素聚合物或綠菌素與苝雙亞醯胺共聚物的結構未受到破壞。
把電聚合膜或共聚合膜當作陰極製成染料敏化太陽能電池 (DSSC)，其光電轉換效率卻不好，原因可能出在填充因子太低。而填充因子太低，可能是電阻太大所致。

關鍵字

電化學 ； 電聚合 ； 染料敏化太陽能電池 ； 紫質 ； 有機光敏劑 ； 菌綠素

並列摘要

We studied electrochemical properties of three series of photo-sensitizers. The first investigation focuses on porphyrins (denoted as LWP11 ~ LWP14) with benzothiadiazole groups and which were extended π-conjugated systems. The second investigation focuses on organic photo-sensitizers (denoted as AN-11 ~ AN-14) with diarylamine group or diarkylamine group. The third investigation focuses on bacteriochlorins (denoted as LS-00, LS-01, LS-03, LS-11, LS-13) which were new photo-sensitizers in our lab. Bacteriochlorins had an absorption approximately 800 nm which are more red-shifted than those of porphyrin’s. As a result, enhanced photovoltaic performance of the corresponding devices may be expected.
Bacteriochlorins with aniline substituent were also studied for their electropolymerization. Electrochemical and UV-visible showed that LS-03 or LS-13 can be electroplymerized onto Pt, indinm tin oxide (ITO) and fluorine doped tin oxide (FTO) surfaces without significantly changing their structures.
ITO or FTO with electropolymerized films were used as counter electrodes in dye-seneitized solar cells. The performance of the devices were not good possibly due to the much lower filled factor.

並列關鍵字

electrochemistry ； electropolymerization ； dye-sensitized solar cell ； porphyrin ； organic photo-sensitizers ； bacteriochlorin

參考文獻

1. H. L. Anderson, Building Molecular Wires from the Colours of Life: Conjugated Porphyrin Oligomers. Chem. Commun., 1999, 2323–2330.

2. H. J. Kim and J. S. Lindsey, De Novo Synthesis of Stable Tetrahydroporphyrinic Macrocycles: Bacteriochlorins and a Tetradehydrocorrin. J. Org. Chem., 2005, 70, 5475-5486.

3. N. Wakao, T. Shiba, A. Hiraishi, M. Ito and Y. Sakurai, Distribution of Bacteriochlorophyll a in Species of the Genus Acidiphilium. Curr. Microbiol., 1993, 27, 277-279.

4. V. V. Yurkov and J. T. Beatty, Aerobic Anoxygenic Phototrophic Bacteria. Microbiol. Mol. Biol. Rev., 1998, 62, 3, 695-724.

5. J. R. Stromberg, A. Marton, H. L. Kee, C. Kirmaier, J. R. Diers, C. Muthiah, M. Taniguchi, J. S. Lindsey, D. F. Bocian, G. J. Meyer and D. Holten, Examination of Tethered Porphyrin, Chlorin, and Bacteriochlorin Molecules in Mesoporous Metal-Oxide Solar Cells. J. Phys. Chem. C, 2007, 111, 15464-15478.