鋁摻雜氧化鋅複合式結構應用於染料敏化太陽能電池

本研究以水熱法製備低密度的鋁摻雜氧化鋅微米柱在無晶種層的FTO導電玻璃上，其微米柱長度約為9μm左右，之後再使用刮刀塗佈法將直徑約為25nm的二氧化鈦奈米粒子刮於微米柱之間。實驗製備了0%~30%不同鋁濃度比例摻雜含量的氧化鋅微米柱，並且應用於染料敏化太陽能電池複合電極來進行評估。由實驗結果發現，鋁的摻雜不僅可以改善氧化鋅微米柱的電性，也改善電極表面形貌與結構，而使微米柱電極對染料的吸附能力增加。由不同鋁濃度比例摻雜含量的實驗結果發現，在水熱環境中摻雜20%鋁濃度的氧化鋅微米柱結晶性增強，使電極長度由5μm增加至8μm，半徑則由0.9μm增加至1.9μm，電極面寬從0.9μm增加至1.7μm，進而讓電子在氧化鋅微米柱的短路電流從10.66 mA/cm2增加到10.83 mA/cm2，而且由效率量測的結果證明了20%鋁濃度的摻雜，其太陽能電池的光電轉換效率最高可達4.60%。

關鍵字

氧化鋅；二氧化鈦；染料敏化太陽能電池

並列摘要

In this study, the composite photo-anode of TiO2 nanoparticles (NPs) and Al-doped ZnO microrods (MRs) were fabricated on fluorine-doped tin oxide (FTO) glass. The length of Al-doped ZnO MRs is about 9μm, which were grown by hydrothermal method on free seed FTO glass and followed by doctor blade of TiO2 NPs (diameter of 25 nm) on the MRs surface. Al-doped ZnO microrods arrays (MRS) with the Al contents in the region of 0%-30% were prepared, and evaluated as photo anodes for DSSCs. It was found that Al-doping has changed not only electrical properties but also the morphology and structure of the ZnO MRs, which increased the ability of microrods electrode to absorb dye. While 20% Al-doping in ZnO MRs by hydrothermal growth, the length of microrods increased from 5μm to 8μm and the radius of electrode increased from 0.9μm to 1.9μm, and the width of electrode increased from 0.9μm to 1.7μm. These results increased the short-circuit current of dye-sensitized solar cell from 10.66 mA/cm2 to 10.83 mA/cm2 with 20 % Al-doping in ZnO. The best efficiency of dye-sensitized solar cell with Al-doped ZnO microrods is 4.60%.

並列關鍵字

ZnO ； TiO2 ； Dye-Sensitized Solar Cells

參考文獻

Akhtar, M. S., Khan, M. A., Jeon, M. S., & Yang,O. B. (2008). Controlled synthesis of various ZnO nanostructured materials by capping agents-assisted hydrothermal method for dye-sensitized solar cells. Electrochimica Acta, 53 (27), 7869-7874.