電化學合成階層式氧化鋅奈米片/奈米複合結構應用於染料敏化太陽 能電池之研究

Electrochemical Synthesis of Hierarchical ZnO Nanosheet/Nanoparticle Composite Structures for Dye-Sensitized Solar Cells

徐仕杰(Shih-Chieh Hsu)

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(2013年)

摘要

本研究以二階段通氧電化學沉積法製備階層式氧化鋅奈米片/奈米顆粒之結構，並將其製成染料敏化太陽能電池的工作電極，二階段過程包括先將奈米片沉積於導電玻璃基板，再於奈米片上二次沉積奈米顆粒。在二次沉積前，需經150°C低溫熱處理將氧化鋅前驅物轉變成氧化鋅奈米片。經由XRD和SEM顯示結果得知製備條件的影響包括一階段奈米片的燒結時間，沉積時間及二階段沉積時的鍍液濃度。此文也探討了奈米結構的製備條件及其對染料敏化太陽能電池光電特性的影響。
研究結果顯示，相較於一開始只有奈米片的結構，本文二階段電沉積分層分支的結構改善了染料敏化太陽能電池在光電特性上的表現。經由最適化奈米結構的沉積條件，發現在有機小分子染料D149敏化下，電池的光電轉換效率可達4.12%為最高。

關鍵字

染料敏化太陽能電池 ； 電化學沉積 ； 氧化鋅 ； 階層式奈米結構 ； 奈米片 ； 奈米顆粒

並列摘要

Hierarchical ZnO nanostructures consisting of nanosheets and nanoparticles were synthesized via a two-step electrochemical deposition process. The two-step process involves the growth of primary nanosheets on conductive glass substrates, followed by the deposition of secondary nanoparticles on the surfaces of the primary nanosheets. Before the second-step electrodeposition took place, the primary nanosheets were calcined at 150°C to convert the as deposited precursors to ZnO. The effects of preparation conditions, including the calcination time of the primary nanosheets, the deposition time, and the electrolyte concentration of the second-step deposition, on the dimensions and structures of the resulting nanoarchitectures were studied using powder x-ray spectroscopy and scanning electron microscopy. This study also investigates the effects of nanostructure preparation conditions on the photovoltaic performances of the resulting dye-sensitized solar cells.
The DSSCs based on the synthesized hierarchical nanostructures exhibited improved photovoltaic performances compared to those fabricated using bare nanosheets. By using the optimized preparation condition of nanostructure, an overall conversion efficiency of 4.12% was achieved.

並列關鍵字

dye-sensitized solar cells ； electrochemical deposition ； ZnO ； hierarchical nanostructure ； nanosheet ； nanoparticle

參考文獻

45.林俊民，電化學沉積氧化鋅薄膜應用於可撓式染料敏化太陽能電池之研究，碩士論文，台北科技大學，2012。

78.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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