不同形狀的金奈米粒子應用於染料敏化太陽能電池光電極之研究

Application of Different Shape Gold Nano-particles on the Photoelectrode of Dye Sensitized Solar Cells

林宇倩(Yu-Chien Lin)

指導教授 ： 閔庭輝

國立虎尾科技大學/電機資訊學院/電子工程系碩士班/碩士(2012年)

摘要

本研究使用液相晶種成長法(seed-mediate growth method)製備不同形狀之金奈米粒子，並應用於染料敏化太陽能電池之光電極中，探討添加不同形狀金奈米粒子之表面電漿共振(surface plasmon resonance)效應對染料敏化太陽能電池特性之影響。光電極之製作採用刮刀塗佈法(scraper method)，製備二氧化鈦/金(TiO2/Au)之複合結構。由穿透式電子顯微鏡(TEM)分析得知球狀直徑約45 nm、短棒狀(長寬比約2.5)平均長與寬分別為55與22 nm、長棒狀(長寬比約4)平均長與寬分別為55與14 nm。添加0.1、0.05、0.01 mL之金奈米粒子於二氧化鈦作為探討，結果顯示最佳添加量為0.05 mL，其開路電壓(VOC)為0.65 V、短路電流(JSC)為18.24 mA/cm2、光電轉換效率(η)為7.08 %。而添加不同之金奈米粒子則以長棒狀(長寬比約4)為最佳光電轉換效率，其開路電壓(VOC)為0.66 V、短路電流(JSC)為18.30 mA/cm2、光電轉換效率(η)為7.29 %，因此添加不同形狀之金奈米粒子能有效提升約1 %以上之光電轉換效率。染料敏化太陽能電池之生命週期則高達2個月以上，且光電轉換效率平均維持在7.20 %。

關鍵字

金奈米粒子 ； 染料敏化太陽能電池 ； 液相晶種成長法

並列摘要

In this study, we used seed-mediate growth method to prepare the different shapes of gold nanoparticles, and applied on the photoelectrode of dye-sensitized solar cells, that explore to add different shapes the gold nanoparticles of surface plasmon resonance on the characteristics of dye-sensitized solar cells. The photoelectrode was using scraper method to prepare the TiO2/Au of composite structures. TEM analysis showed that the spherical gold nanoparticles diameter of about 45 nm, and short gold nanorods (aspect ratio of about 2.5) of the average length and width were 55 and 22 nm, and long gold nanorods (aspect ratio of about 4) of the average length and width were 55 and 14 nm. The capacity of gold nanoparticles adding in TiO2 paste is 0.1, 0.05, and 0.01 mL. The results show that the best capacity is 0.05 mL, its open circuit voltage (VOC) is 0.65 V, short circuit current (JSC) is 18.24 mA/cm2 and the photoelectric conversion efficiency (η) is 7.08 %. In addition, the long gold nanorods (aspect ratio of about 4) has the better photoelectric conversion efficiency than short gold nanorods, its open circuit voltage (VOC) is 0.66 V, short circuit current (JSC) is 18.30 mA/cm2 and the photoelectric conversion efficiency (η) is 7.29 %. Therefore, application of gold nanoparticles on the photoelectrode of dye sensitized solar cell can effectively improve the conversion efficiency more than about 1 %. The lifetime of the dye-sensitized solar cells is about two months or more, and the average photoelectric conversion efficiency is maintained at 7.20 %.

並列關鍵字

Gold nanoparticles ； dye-sensitized solar cells ； seed-mediated growth method

參考文獻

[1]馮垛生，2009，”太陽能發電原理與應用”，五南圖書出版。

[2]李雯雯、王孟傑，2007，”薄膜太陽能電池技術發展潛力分析”，工業技術研究院出版。

[3]林明獻，2008，”太陽能電池技術入門”，全華圖書出版。

[15]謝倩芳，2006，”製備零維與一維之金奈米材料及奈米金粒子在多孔二氧化鈦上特性之研究”，中原大學化學系碩士論文。

[5]J. J. Mock et al., 2002, “Shape effects in plasmon resonance of individual colloidal silver nanoparticles”, Journal of Chemical Physics, 116, pp. 6755 ~ 6759.