電化學沉積法製備氧化鋅奈米片應用於染料敏化太陽能電池之研究

Electrochemical Deposition of Zinc Oxide Nanosheets and Their Application in Dye-Sensitized Solar Cells

陳碧怡(Pi-Yi Chen)

指導教授 ： 余琬琴

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00614

摘要

本研究以電化學沉積法在導電玻璃上生長氧化鋅奈米片，經有機染料D149敏化後，製備成染料敏化太陽能電池之工作電極。主要探討鍍液溫度與鍛燒時間對奈米片結構與電池元件效率的影響，電鍍液溫度分別設定為40 ℃、50 ℃與60 ℃，鍛燒溫度固定在150 ℃，而鍛燒時間則是1-36 h。
研究結果顯示，電化學沉積所得的奈米片主要由氧化鋅前驅物Zn5(OH)8Cl2構成，經鍛燒後該前驅物轉化成氧化鋅，而且原先表面平滑的奈米片上出現許多微小的孔洞。無論鍍液溫度為何，最佳鍛燒時間皆為24 h，但是染料吸附量隨鍍液溫度的降低而上升，電池元件的光電流密度(Jsc)與光電轉換效率也有相同的變化。當鍍液溫度為40 ℃，薄膜厚度為13 μm時，電池元件的光電轉換效率可達3.70 %。

關鍵字

染料敏化太陽能電池 ； 電化學沉積 ； 氧化鋅 ； 奈米片

並列摘要

ZnO nanosheet arrays were prepared by using the electrochemical deposition method and fabricated into the photoanodes of dye-sensitized solar cells (DSSCs) upon sensitization with the organic dye D149. The present study investigated the effects of deposition temperature and calcination time on the structures of the prepared ZnO nanosheets and the photovoltaic performance of the resulting DSSCs. Three deposition temperatures (40 ℃, 50 ℃, and 60 ℃) were tested. The calcination temperature was fixed at 150 ℃, while the calcination time was varied from 1 to 36 h.
The results show that the nanosheets grown on the conducting glass substrate were composed mainly of Zn5(OH)8Cl2. Upon heat treatment at 150 ℃, the precursor was converted into ZnO via pyrolysis. Meanwhile, numerous through pores were generated on the originally smooth nanosheets. Optimal calcination time was found to be 24 h, regardless of the deposition temperature utilized. On the other hand, the dye loading of the ZnO film was dependent on the deposition temperature; a low deposition temperature gave a high dye loading. The short-circuit current densities and the power conversion efficiencies of the fabricated DSSCs followed the same trend with the deposition temperature. At a film thickness of 13 μm, the DSSCs based on the 40 ℃-grown nanosheets attained a conversion efficiency of 3.70 %.

並列關鍵字

dye-sensitized solar cell ； electrochemical deposition ； zinc oxide ； nanosheet

參考文獻

60. 蔡季洋，氧化鋅奈米片的製備及其在染料敏化太陽能電池之應用，碩士論文，國立台北科技大學，台北，2011。

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