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研究生: 楊鴻偉
Yang, Hong-wei
論文名稱: 異質結構可撓曲有機薄膜太陽能電池之研究
Flexible heterostructure organic solar cells
指導教授: 周維揚
Chou, Wei-yang
學位類別: 碩士
Master
系所名稱: 理學院 - 光電科學與工程研究所
Institute of Electro-Optical Science and Engineering
論文出版年: 2009
畢業學年度: 97
語文別: 中文
論文頁數: 64
中文關鍵詞: 駢苯衍生物五環素開路電壓可撓曲有機太陽能電池
外文關鍵詞: pentacene, perylene derivatives, flexible organic solar cells, open circuit voltage
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  • 本研究探討p型有機材料五環素(pentacene)/n型有機材料N,N′-diheptyl-3,4,9,10-tetracarboxylic diimide(PTCDI-C7H15)異質結構有機薄膜太陽能電池製作於軟性基板。觀察元件在伸展彎曲及壓縮彎曲時,其開路電壓改變的情形。由於電池的開路電壓主要是受到p型有機材料及n型有機材料的位能差,因此彎曲薄膜,並利用光激螢光光譜及紫外光-可見光光譜分析,發現有明顯位移的現象,推測薄膜受到彎曲應力的影響,能使得材料能隙的改變。再進一步由拉曼光譜訊號分析有機材料五環素彎曲時的改變,使用Gaussian和Lorentzian函數去擬合出拉曼峰值的半高寬,藉由彎曲應力對於材料拉曼振動各訊號強弱的影響,並瞭解分子間π電子雲作用力的改變。最後,以變溫光激螢光光譜分析PTCDI-C7H15薄膜,由於熱漲冷縮的原理,使得在分子間距離改變,且π電子雲作用力改變,進而驗證分子間作用力改變將對能隙帶來的影響。

    The characteristics of pentacene/perylene derivatives based flexible organic solar cells (FOSCs), in which the pentacene and N,N′-diheptyl-3,4,9,10-tetracarboxylic diimide (PTCDI-C7H15) are donor and acceptor layers, respectively, are discussed in this thesis. The open circuit voltage (VOC) is given by the difference between the highest occupied molecular orbital of the donor molecules and the lowest unoccupied molecular orbital of the acceptor molecules. In this study, an obvious shift of the VOC was observed when the flexible substrate was under compressive bending or tensile bending. Photoluminescence (PL) and ultraviolet-Visible spectrophotometer were performed on the FOSC to investigate the correlations between VOC of the FOSC and energy gaps of the donor and acceptor for explaining the phenomenon of the shift of the VOC. Moreover, we applied micro Raman spectroscopy to study the degree of the strain for the pentacene film through the full width at half-maximum (FWHM) of Raman peak at various bending curvatures. Finally, the red shift of the energy gap of PTCDI-C7H15 was due to the compressive strain on PTCDI-C7H15 molecules was also confirmed by temperature dependent PL in which the compressive strain is induced by thermal effect.

    摘要 I Abstract II 致謝 III 目次 IV 表目錄 VII 圖目錄 VIII 第1章 緒論 1 1.1 前言 1 1.2 各式太陽能電池介紹 2 1.2.1 第一代晶圓型太陽能電池 2 1.2.2 第二代薄膜型太陽能電池 3 1.2.3 第三代有機薄膜型太陽能電池 4 1.3 有機太陽能電池之發展 5 第2章 太陽能電池之原理 11 2.1 有機太陽能電池之工作原理 11 2.2 有機太陽能電池之等效電路 13 2.3 有機太陽能電池各項參數介紹 14 第3章 實驗步驟及量測儀器原理 20 3.1 物理氣相沉積之原理與薄膜成長機制 20 3.2 實驗材料 21 3.3 元件製作流程 22 3.3.1 微影蝕刻 22 3.3.2 AZO塑膠基板的清洗 23 3.3.3 以旋轉塗佈機塗佈PEDOT:PSS 23 3.3.4 以熱蒸鍍方式蒸鍍有機材料層 24 3.3.5 以熱蒸鍍方式蒸鍍金屬電極 24 3.4 元件量測 25 3.4.1 校正太陽光模擬器 25 3.4.2 J-V特性曲線之量測 25 3.4.3 不同曲率半徑J-V特性曲線之量測 26 3.5 薄膜分析與分析儀器 27 3.5.1 光激螢光光譜(Photoluminescence, PL) 27 3.5.2 紫外光-可見光光譜(Ultraviolet-Visible Spectrophotometer) 28 3.5.3 拉曼光譜(Raman) 28 第4章 五環素/駢苯衍生物之異質結構可撓曲薄膜太陽能電池之研究 36 4.1 前言 36 4.2 電性結果與討論 36 4.3 薄膜分析 37 4.3.1 光激螢光光譜分析 37 4.3.2 紫外光-可見光光譜分析 41 4.3.3 拉曼光譜分析 43 4.3.4 變溫光激螢光光譜分析 46 第5章 結論與未來展望 59 參考文獻 61

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