| 研究生: |
許舒惠 Hsu, Shu-Hui |
|---|---|
| 論文名稱: |
以共電鍍方式製作二硒化銅銦薄膜特性之研究 A study on improvement of co-electrodeposition process for CuInSe2 |
| 指導教授: |
李文熙
Lee, Wen-Hsi |
| 學位類別: |
碩士 Master |
| 系所名稱: |
電機資訊學院 - 電機工程學系 Department of Electrical Engineering |
| 論文出版年: | 2009 |
| 畢業學年度: | 97 |
| 語文別: | 中文 |
| 論文頁數: | 107 |
| 中文關鍵詞: | 共電鍍 、二硒化銅銦 |
| 外文關鍵詞: | CuInSe2, co-electrodeposition |
| 相關次數: | 點閱:86 下載:1 |
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本實驗首先先對於溶液進行循環伏安法分析,了解在不同狀態下溶液的一些反應機制的差異,方便控制電鍍的條件;利用EDS對於薄膜進行成分分析;使用X光粉末繞射儀針對薄膜的結構及結晶性進行分析;拉曼光譜分析薄膜是否有二次相的存在;使用掃描式電子顯微鏡觀察鍍層之微結構及緻密性;原子力顯微鏡分析在不同電鍍條件下,鍍層之粗糙度。
實驗結果顯示,調整溶液的相對濃度可以調整初鍍膜的成分比例,使硒化後得到接近理想的組成(Cu:In:Se=1:1:2)。且由拉曼光譜分析可知,當鍍層接近組成時,其Cu2Se與Se訊號也相對減弱許多。適當的調整電壓大小,可以改善鍍層的品質,降低粗糙度。而在照光與溶液加熱輔助下,由XRD分析發現其可以增加薄膜的結晶性,CuInSe2 (112)peak變強且較對稱。且在SEM表面結構分析可以發現在-0.7V與溶液加溫至50℃時,可以得到最佳的鍍層,其堆積較密集,在適當的電沉積速度下,提供鍍層能量可以得到較平坦的鍍層。
Cyclic voltammetry (CV) was utilized to examine the reaction potential of the ions in the solution, and this made us know the mechanism of the co- eletrodeposition. Energy dispersive spectroscopy (EDS) was used to estimate the composition of the thin films. The crystal structure of the thin films was identified by powder x-ray diffraction (XRD). Raman spectroscopy was applied for analysis of second phase. The microstructure was observed by scanning electron microscope (SEM) and atomic force microscope (AFM), and the compactness of the films was also characterized.
Based on EDS analysis, composition of the precursor can be adjust by the concentrations of ions in the solution, then make the films close to the stoichiometry of CuInSe2(Cu:In:Se=1:1:2) after selenization process. And from the Raman spectroscopy, it reveals the reducing of Cu2Se and excess Se. The quality and roughness of the thin films can be improved by adjusting the potential of electrodeposition. And with the assistant of light and raising the temperature of the solution, the crystal structure is much better by XRD and SEM analysis. The (112) peak becomes stronger and sharper. At -0.7V, the potential of electrodepsition, the film of CuInSe2 is more compact and flatter by SEM and AFM analysis. When the temperature of eletrodeosition solution raises to 50℃, the CuInSe2 becomes flatter.
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