臺灣博碩士論文加值系統

本篇論文採用化學溶液法製備具三維氧化鋅奈米結構之背電極，藉由染料吸附及光散射效應提升其染料敏化太陽能電池光電轉換效應及廣角入射光應用。本研究採用有限時域差分法分別針對其花形狀奈米柱及垂直型奈米柱做其光散射模擬，其結果顯示花狀形奈米柱有較佳之光散射。在背電極部分，本論文藉由調整奈米柱成長時間及不同表面形貌，並藉由場發射電子顯微鏡、可見光-紫外光分光光譜儀量測結果得知，其密度、長度、霧度及染料吸附皆有明顯之差異，以花形狀奈米結構有最佳之特性，此外其所製備之染料敏化太陽能電池分別藉由電化學阻抗、變角度太陽能模擬器及量子效率，可得知其花狀形奈米結構亦有最低之界面阻抗，而採用花狀形奈米結構太陽能電池相較於垂直型奈米柱太陽能電池有較高之光電轉換效率，其效率由0.33 %提升至0.61 %，此外元件在變角度太陽能模擬光下，花狀奈米結構在高角度及低角度下，其光電轉換效率變化最為平緩，代表有較佳之廣角特性。

This study adopted a chemical solution technique to prepare a back-contact bottom electrode consisting of three-dimensional ZnO nanostructures. The electrode exhibited dye adsorption and light-scattering characteristics for enhancing the photoelectric conversion efficiency and wide-angle incident light applications of dye-sensitized solar cells. This study used the finite-difference time-domain method to simulate the light scattering of flower-like nanostructure and nanorod structure. The results indicated that the light scattering of flower-like nanostructure is more than nanorods. This study slso explored various types of solar cells by adjusting nanorod growth time, and surface topography. The measurement results obtained from field-emission scanning electron microscopy, and ultraviolet–visible spectroscopy analyses indicated that the density, length, haze, and dye adsorption of the solar cells were different. Among the solar cells, the properties of the flower-like nanostructure were optimal. A variable-angle solar simulator was employed to examine the dye-sensitized solar cells, and electrochemical impedance and quantum efficiency analyses were conducted on them; the results revealed that the interface impedance of the flower-like nanostructure was the lowest. Compared with the solar cells containing vertically aligned nanorods, those containing flower-like nanostructure exhibited higher photovoltaic conversion efficiency, in which the conversion efficiency increased from 0.33% to 0.61%. When the components were placed under solar light with different incident angle, the decreases in photovoltaic conversion efficiency for the f flower-like nanostructure in high and low angles were the smallest, thus indicating that these flower-like nanostructure were associated with relatively more favorable wide-angle characteristics.

目 錄

書名頁 ………………………………………………………………… i
論文口試委員審定書 ………………………………………………… ii
授權書 ……………………………………………………………… iii
中文摘要 ……………………………………………………………… iv
英文摘要 ……………………………………………………………… v
誌謝 …………………………………………………………………… vi
目錄 …………………………………………………………………… vii
表目錄 ………………………………………………………………… viii
圖目錄 ………………………………………………………………… ix
一、 序論……………………………………………………….. 1
1-1 前言……………………………………………………….. 1
1-2 太陽能電池的發展……………………………………….. 2
1-3 太陽能電池原理………………………………………….. 3
二、 理論原理………………………………………………….. 7
2-1 染料敏化太陽能電池組成……………………………….. 7
2-2 氧化鋅基本性質…………………………………………... 9
2-3 AZO薄膜製備技術……………………………………...... 11
2-4 製備氧化鋅奈米柱之方法………………………………… 17
2-5 水溶液成長氧化鋅奈米柱機制……………………………. 21
2-6 文獻回顧……………………………………………………. 22
2-7 散射理論……………………………………………………. 28
2-8 研究動機……………………………………………………. 29
三、 模擬原理及實驗流程………………………………............. 30
3-1. 模擬原理……………………………………………………. 30
3-2. 實驗流程…………………………………………………… 31
3-3. 特性分析:量測儀器介紹…………………………………... 33
四、 結果與討論………………………………………………... 37
4-1 氧化鋅奈米結構之光性模擬………………………………. 37
4-2 氧化鋅奈米柱結構………………………………………… 39
五、 結論……………………………………………………….. 52
參考文獻………………………………………………………………… 53

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