天然染料應用於染料敏化太陽能電池之特性分析

Natural Dyes as Photosensitizers for Dye-sensitized Solar Cells

羅右任(Yu-Jen Lo)

指導教授 ： 張合 ； 韓麗龍

國立臺北科技大學/機電學院/製造科技研究所/碩士(2009年)

https://doi.org/10.6841/NTUT.2009.00156

摘要

本論文以天然素素為染料，從石榴葉中萃取葉綠素，從桑葚果實中萃取花青素，並探討萃取溶劑、染料濃度、萃取溫度、pH值對光電轉換效率之影響，此外也將所得之葉綠素與花青素混合成為雞尾酒染料，觀察其光電轉換效率之影響。此外，電池光電極之製備使用商用P25粉末經電泳沉積方式於ITO導電面電鍍成一層厚度介於10~13微米之薄膜，對電極使用之FTO則是以濺鍍法製成厚度約20 nm之Pt電極，加入電解液(I3�)後將其組成太陽能電池模組，再以AM 1.5之模擬太陽光照射(100 mW/cm2)，分析光電池模組之轉換效率。實驗結果可得到葉綠素素轉換效率為0.597 ％，開路電壓(Voc)為0.56 V，短路電流密度(Jsc)為2.05 mA/cm2，Fill factor(FF)為0.52，而萃取自桑甚之花青素染料其轉換效率為0.548 ％，開路電壓(Voc)為0.555 V，短路電流密度(Jsc)為1.89 mA/cm2，Fill factor(FF)為0.53。研究藉由雞尾酒之方法來混合葉綠素及花青素染料轉換效率為0.722 %，開路電壓(Voc)為0.53 V，短路電流密度(Jsc)為2.8mA/cm2，Fill factor(FF)為0.49，整體效率有明顯之提升。

關鍵字

染料敏化太陽能電池 ； 葉綠素 ； 花青素 ； 雞尾酒 ； 天然色素 ； TiO2

並列摘要

In this paper, we have extracted chlorophyll from the pomegranate leaves and anthocyanin from mulberry fruits to used as-prepared natural dye to investigate the correlation between the extraction solvent and the extraction temperature and the concentration and pH condition for dye extraction to DSSC performance. Then combine chlorophyll and anthocyanin as the dye cocktails to perform the photoelectron conversion efficiency.In addition, Electrophoretic deposition was performed to let the TiO2 deposite nanoparticles on the indium tin oxide (ITO) conductive glass, forming a TiO2 thin film with the thickness of 10~13 μm. This TiO2 thin film underwent sintering at 450℃ to enhance the compactness of thin film. Counter electrode is sputtered prepared 20 nm Pt film on FTO glass. The electrodes, electrolyte (I3-), and dyes were assembled into a cell module and illuminated by light source of simulate AM1.5 with light strength of 100 mW/cm2 to perform the photoelectron conversion efficiency test. The result showed the efficiency of 0.597 % for chlorophyll with open-circle voltage (VOC) of 0.56 V and short-circuits current density (JSC) of 2.05 mA/cm2, and fill factor (FF) of 0.52. The efficiency of 0.548 % for anthocyanin with open-circle voltage (VOC) of 0.555 V and short-circuits current density (JSC) of 1.89 mA/cm2, and fill factor (FF) of 0.53. The efficiency of 0.722 % for chlorophyll and anthocyanin as the dye cocktails with open-circle voltage (VOC) of 0.53 V and short-circuits current density (JSC) of 2.8 mA/cm2, and fill factor (FF) of 0.49.

並列關鍵字

Dye-sensitized solar cells ； Natural dyes ； Dye cocktails ； TiO2

參考文獻

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