氧化鋅奈米柱應用於染料敏化太陽能電池之研究

Application of ZnO nanorods on the electrode of Dye-Sensitized Solar Cell

陳盈伸(Ying-Shen Chen)

國立虎尾科技大學/電機資訊學院/光電與材料科技研究所/碩士(2007年)

摘要

本研究主要目的為探討使用氧化鋅奈米柱應用於染料敏化太陽能電池上。並且提出低製備成本且具有高產率、均一性及熱穩定性佳之氧化鋅奈米柱的製作方式。近來以水熱法成長成功製備出氧化鋅奈米柱的例子越來越多，本論文即是以水熱法在ITO玻璃基板上成長出氧化鋅奈米柱，使用的反應物是硝酸鋅與HMT的重量比1:1，反應時間為12hrs，合成出高品質與高長寬比之一維氧化鋅奈米陣列。 玻璃基板以RF Sputter鍍厚度約為100nm的氧化鋅緩衝層，實驗發現在鍍有氧化鋅緩衝層的玻璃基板上，可以成長出氧化鋅奈米線，並且隨著溫度的改變所成長出來的氧化鋅奈米線尺寸也會有所不同 。氧化鋅奈米柱的薄膜電極應用於染料敏化太陽能電池上，需藉由染料的吸附作為光敏化劑，以增加電子傳導能力，本研究將柱狀的薄膜電極長時間浸泡在以紫質衍生物TCPP 為染料的環境下，的確可對工作電極產生光催化作用。本研究使用的反電極是利用蒸鍍法製出50nm 白金電極，具有使電解質還原反應的催化效果，當ZnO奈米柱與染料敏化後之工作電極，與蒸鍍法製出之白金反電極均在導電玻璃上製造完成後，注入電解質後再進行封裝完成一個三明治結構。最後對封裝完畢之太陽能電池測試。 製備出的奈米柱電極以UV/Vis 光譜儀做初步的判斷電極的吸收光譜以及穿透率；再由掃描式電子顯微鏡(Scanning Electron Microscopy,SEM)觀察電極的表面形態，並利用X-ray 繞射儀作組成及結構上的判定，再經由接觸角量測儀量測其接觸角，以探討不同合成參數對氧化鋅表面形態的影響。

並列摘要

Abstract
The study is mainly to discuss the effects of ZnO nanorods applied in ZnO nanorods electrode on the performance of the dye-sensitized solar cell. The method of producing the nanorods is within the simple way, low fabrication cost, uniformly size, and highly thermal stable. In the recently,there are more and more succeed examples to prepare ZnO nanorods with hydrothermal synthesis method. In this study, the aqueous solution method was employed to synthesizeone-dimensional well-aligned ZnO nano-array on ITO glass substract. The optimized quality and aspect ratio of
ZnO nano-array was obtained while the reactants ratio and reaction time were 1:1 and 12 hrs, respectively.
The glass substrate was used RF sputter to plat a buffer layer of ZnO that the thickness was about 100nm.After experiment, we can detect the nanorods dimension will changes with different temperature. The influence of dye （porphyrins derivate TCPP）adsorption with ZnO nanorods was also identified by X-ray photoelectron Spectroscopy (XPS). The counter electrode is prepared electron beam evaporation to produce Platinum（Pt） electrode with thickness about 50nm, that help the reduction process of the electrolyte. After work electrode and counter electrode were made. The electrolyte was ready to infuse from the edge. Finally the packed Dssc was tested for its performance under the sunlight exposure.
After working out nanorods,the morphology, structure, composition, and optical properties are studied by Ultraviolet-Visible spectrophotometer(UV/Visspectrophotometer), and X-ray diffraction (XRD),and the contact angle measureinstrument. And the influences of reactants concentration on the surface morphology were also investigated.

參考文獻

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