臺灣博碩士論文加值系統

　　本論文主要的研究方向著重在奈米壓印對於有機太陽能電池的影響，我們使用P3HT和PCBM兩種高分子材料混合當作太陽能電池的主動層，製作最基本的結構(Glass/ITO/PEDOT:PSS/P3HT&PCBM/Al)。藉著調整主動層的厚度以及元件後退火的溫度和時間來找出對元件基本參數較佳的條件。
　　然後將一個經過蝕刻處理的Silicon基板當作模具，在室溫下對主動層做奈米壓印，並探討薄膜表面型態的變化以及壓力的影響。可以發現薄膜表面型態的變化能夠幫助光電流的增加，而壓力影響到元件的開路電壓以及填充因子，讓有機太陽能電池的效率提昇。
　　最後會探討在加熱的情況下，使用平坦的Si基板對元件背電極壓印。觀察在加熱結合加壓的情況下，對元件效能的提昇。藉由這種方式來讓金屬電極以及有機薄膜之間有更好的接觸，增加載子的遷移率，幫助元件的短路電流和填充因子增加。

The main research in this paper discusses the effect caused by nanoimprinting for organic solar cells. We use two types of mixed polymer materials, P3HT and PCBM, as active layer of solar cells and produce the basic structure (Glass / ITO / PEDOT: PSS/P3HT & PCBM / Al). By adjusting the thickness of active layer, temperature and time of post-annealing, the device with better performance can be achieved.
The technology of nanoimprinting is applied here. We use silicon substrate, which surface has been etched, as the stamp and apply nanoimprinting on the active layer at room temperature. Then we discuss the change of film surface and pressure effect for film. We find the change of film surface increase the photocurrent and the pressure can affect components of the open circuit voltage and fill factor. They can make the organic solar cell more efficiency.
At final, we use flat substrate of Si stamp to imprinting the back electrode of device at heating condition. And observe the improvement of device performance under both heating and pressurizing. By applying this method, better contact between metal electrode and organic film can be achieved, and the mobility of carriers is increased, too. The short-circuit current and fill factor of components are improved.

摘要 I
Abstract II
致謝 III
目錄 IV
表目錄 VIII
圖目錄 IX
第一章　研究背景與動機 1
1-1 太陽能產業的發展 1
1-2 各種太陽能電池的介紹 2
1-3 奈米壓印技術介紹 4
1-4 研究動機 6
1-5 論文架構及研究方向 7
第二章　太陽能電池的原理 8
2-1 太陽能電池原理 8
2-1-1 P-N接面太陽能電池 8
2-1-2 有機太陽能發電原理 10
2-2 太陽能電池的特性分析 11
2-2-1 開路電壓 (Open circuit voltage, Voc) 11
2-2-2 短路電流 (Short circuit, Isc) 12
2-2-3 填充因子 (Fill factor) 12
2-2-4 能量轉換效率(Power conversion efficiency, PCE) 14
2-2-5 外部量子效率(External quantum efficiency, EQE) 14
2-3 空間電荷侷限電流(Space charge limited current) 15
2-4 光入射多層結構後在各層的分佈 17
第三章 實驗流程 22
3-1 ITO玻璃清洗與圖樣化 22
3-1-1 ITO玻璃清洗 22
3-1-2 ITO表面圖樣化 22
3-2 太陽能電池元件製作 23
3-2-1 ITO玻璃清洗 24
3-2-2 電洞傳輸層塗佈 24
3-2-3主動層塗佈 25
3-2-4 背電極蒸鍍 25
3-2-5 元件封裝和退火 26
3-3 將奈米壓印應用於太陽能電池實驗流程 26
3-3-1 Si基板製作流程 26
3-3-2 主動層壓印 27
3-3-3 製作完後平壓 28
3-3-4 製作完後熱壓 28
3-4 製作Electron only元件 29
3-5 實驗量測 29
3-5-1 I-V的照光特性曲線量測 29
3-5-2 IPCE量測 29
3-5-3 微拉曼光譜儀 30
3-5-4 原子力顯微鏡 (AFM) 30
3-5-5 掃描式電子顯微鏡 (SEM) 30
第四章　結果與討論 43
4-1 前言 43
4-2 元件參數調變 43
4-2-1主動層轉速調變 43
4-2-2 退火溫度參數調變 45
4-2-3 退火時間調變 47
4-2-4 結論 47
4-3 利用奈米壓印技術對元件的主動層施壓 48
4-3-1 探討主動層做壓印對元件的影響 48
4-3-2 討論表面變化對光電流提昇 49
4-3-3 討論壓印對填充因子的提昇 52
4-3-4 探討在純壓力的情況下對主動層造成的影響 55
4-3-5 結論 56
4-4 使用熱壓對整體元件的影響 56
4-4-1 探討熱壓後元件的增益 57
4-4-2 觀察電子的遷移率在經由熱壓後的影響 58
4-4-3 結論 60
第五章　結論與未來規劃 88
5-1 結論 88
5-1-1 基本元件參數改善 88
5-1-2 奈米壓印對元件效率的改進 88
5-2 未來規劃 88
參考文獻 90

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