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| 研究生： |
吳育華 Yu-hua Wu |
|---|---|
| 論文名稱： |
鋅酞花青薄膜之蒸鍍與熱處理條件之探討及其對太陽能電池效率之影響 The growth and post-deposition annealing of thermal evaporated ZnPc thin films and their effects on the solar cell performances |
| 指導教授： |
劉進興
Chin-hsin Liu |
| 口試委員: |
戴龑
Yian Tai 陳貴賢 Kuei-hsien Chen 林麗瓊 Li-Chyong Lin |
| 學位類別： |
碩士 Master |
| 系所名稱： |
工程學院 - 化學工程系 Department of Chemical Engineering |
| 論文出版年： | 2007 |
| 畢業學年度： | 95 |
| 語文別： | 中文 |
| 論文頁數： | 140 |
| 中文關鍵詞： | 鋅酞花青 、晶相 、太陽能電池 |
| 外文關鍵詞： | phthalocyanine, phase, solar cell |
| 相關次數： | 點閱：223 下載：1 |
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本研究探討真空蒸鍍條件以及蒸鍍後之熱處理對ZnPc薄膜晶相與表面型態之影響；並製成有機太陽能電池以探討微觀結構對太陽能轉換效率之影響。我們以XRD、SEM與AFM分析晶相與表面型態，並測量I-V Curve以計算太陽電池效率。
我們發現: (1) 於室溫下，以不同鍍率沈積所得之ZnPc，皆為α-form，經過高溫熱處理後，逐漸轉變為β-form；(2) 熱處理溫度增加時(200℃-350℃)，β-ZnPc之比例增加，但熱處理時間(300℃, 30分-4小時)，對ZnPc之晶相轉變並無太大影響；(3) 在基板溫度250℃蒸鍍，可得長鬚狀之β-ZnPc；(4) 以高鍍率沈積所得之薄膜，經過熱處理後，較易產生相變化，即由相轉變之能障減小；(5) 將在基板溫度250℃沈積所得之ZnPc膜，再以熱處理後，可得條板狀且結晶性較佳之β-ZnPc。
製作結構為Au(20nm)/ ZnPc(60nm)/n-Si (525μm)/ Al(200nm)之太陽能電池，以觀察晶相對太陽能電池效率之影響，發現：α-ZnPc之光電轉換效率為0.015%，而以平板狀β-ZnPc薄膜製成之元件，其光電轉換效率可達0.14%。
In this thesis, we study the phase transformation of zinc phthalocyanine (ZnPc) thin films and their effects on the solar cell performances. The ZnPc thin films are deposited by the vacuum evaporation technique. The effects of deposition conditions and the post-deposition annealing on the crystal structure and the surface morphology of ZnPc have been studied by the XRD, SEM and AFM. I-V measurement for the Au(20nm)/ ZnPc(60nm)/n-Si (525μm)/Al (200nm) devices.
We find that: (1) Films deposited at room temperature and various rates are of the α-form, and are gradually transformed into theβ-form; (2) Higher annealing temperatures (200℃-350℃) will result in more β-forms in the film, but longer annealing time (30min.-4hr. at 300℃) have little effect; (3) Films deposited at the substrate temperature of 250℃ will give the β- form of the long whisker shape; (4) The phase transformation takes place easier with a lower energy barrier when the film is deposited at the higher rate; (5) Films deposited at 250℃ and then annealed at 300~350℃ are of the β-form with the lath shape and better crystallinity.
That solar cells based on the α-ZnPc show an average efficiency of 0.015% , while those based on the lath-like β-ZnPc show an average efficiency of 0.14%.
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