水熱法成長氧化鋅奈米線陣列應用於染料敏化太陽能電池

Application of ZnO nanowire array on the electrode of dye-sensitized solar cell by hydrothermal method

陳冠文

指導教授 ： 程金保

國立臺灣師範大學/科技學院/機電科技研究所/碩士(2009年)

摘要

本研究使用溶膠凝膠法(sol gel method)製備氧化鋅薄膜，作為成長氧化鋅奈米線陣列基底，經退火處理後，可得到高結晶的微小表面顆粒種子層；水熱法(Hydrothermal method)的水溶液環境中利用氧化鋅特有極性表面特性，在同質氧化鋅種子層上成長奈米線陣列，控制反應水溶液濃度以及成長時間，製備出高準直性的奈米線陣列，得到最佳的電極長度與長寬比(L=2300 nm, L/D=46)。在水熱環境中摻雜2 at.%鋁使氧化鋅奈米線增強結晶性，使長寬比由46增加至60.5，改善電極表面形貌，鋁離子的嵌入亦能增強電子傳導性與材料表面極性，使奈米線電極對染料吸附能力增加、抑止ZnO2+/dye錯合物的產生。以更換反應水溶液方式持續成長摻雜鋁奈米線增加體表面積，接續成長方式使電極長度由2.3 m增加至6.6 m，而效率則由0.152%提升至0.834%。摻雜2 at.%鋁氧化鋅奈米線電極，在相似長度下(約6.5 m)，改善電池效率由純氧化鋅奈米線陣列的0.492%提升至0.834%。

關鍵字

氧化鋅 ； 水熱法 ； 摻雜鋁 ； 染料敏化太陽能電池

並列摘要

n this study, the use of sol-gel method preparation of ZnO thin film, as the growth of zinc oxide nanowire array substrate, after annealing, will be high crystallinity of the small surface particles seed layer. Hydrothermal method in the aqueous environment specific to the use of zinc oxide polar surface properties, in the same seed layer of zinc oxide nanowire array growth, control reaction in aqueous solution concentration, as well as the growth time, the preparation of high collimation of the nanowire arrays. The most good length and aspect ratio of the electrode (L = 2300 nm, L / D = 46). Hydrothermal environments in the doping 2 at.% Aluminum zinc oxide nanowire crystalline enhanced, so that aspect ratio increased to 60.5 from 46, to improve the electrode surface morphology, aluminum ion can embed and enhance the electronic conductivity of materials surface polarity, so that nanowire electrode to increase the adsorption capacity of dye, the stifling of the ZnO2+ / dye complexes generated wrong. Way to replace the reaction of aqueous solution growth of aluminum-doped nanowire increased body surface area, continued growth means the length of electrode from 2.3 m to 6.6 m, and the efficiency of up to 0.152 percent from 0.834 percent. Doped 2 at.% Aluminum zinc oxide nanowire electrode, similar in length in the next (about 6.5 m), to improve the efficiency of the battery from pure zinc oxide nanowire arrays of 0.492% to 0.834%.

並列關鍵字

ZnO ； hydrothermal method ； doped Al ； DSSC

參考文獻

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