| 研究生: |
高雅君 kao, Ya-chun |
|---|---|
| 論文名稱: |
錯合劑對電沉積二硒化銅銦薄膜的影響研究 A Study on Influence of Complexing Agent for Electrodeposition of CuInSe2 Thin Film |
| 指導教授: |
黃守仁
Whang, Thou-Jen |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 化學系 Department of Chemistry |
| 論文出版年: | 2008 |
| 畢業學年度: | 96 |
| 語文別: | 中文 |
| 論文頁數: | 105 |
| 中文關鍵詞: | 錯合劑 、太陽能電池 、電沉積 、CuInSe2 |
| 外文關鍵詞: | electrodeposition, solar cells, CuInSe2, complexing agent |
| 相關次數: | 點閱:54 下載:1 |
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本研究以電沉積的方法製備二硒化銅銦(CuInSe2,CIS )太陽能電池的主吸收層;在許多種製備方法中,電沉積法受到廣泛注意,在於它的設備裝置簡易具有製造大面積材料的潛力。
主吸收層薄膜的生長為CuInSe2 /ITO/Glass,電解液中添加不同的錯合劑三乙醇胺( triethanolamine,TEA )、檸檬酸鈉( Na-citrate acid )、酒石酸( tartaric acid )個別探討沉積過程中電壓、離子濃度、電鍍時間、退火溫度對於CuInSe2薄膜的影響。
這三種錯合劑,主要以檸檬酸鈉對於沉積CuInSe2薄膜有明顯的錯合效果,銅、硒還原電位會隨著檸檬酸鈉濃度的增加而往陰極移動,不影響銦的還原電位,並且可以改善薄膜結晶性;因此,薄膜沉積的電位範圍往陽極移動至-0.5 V。其他錯合劑雖然沒有明顯錯合效果,沉積電位沒有改變,但在電解液中與離子間存在靜電吸引力,退火後的繞射峰(112)的強度明顯,進一步改良薄膜的均勻性,提高薄膜的品質。
Copper indium diselenide, CuInSe2 (CIS), has become one of the potential materials for photovoltaic applications. There are many methods such as sputtering, three source coevaporation, spray pyrolysis and electrodeposition for preparing CuInSe2 thin films. Among these, electrodeposition becomes more importance due to its low-cost, ease of large scale production and safe method.
Formation of CuInSe2 thin films from aqueous solution including Na-citrate acid, triethanolamine and tartaric acid as complexing agent is reported. In order to deposit the three elements simultaneously, the individual potentials must be brought closer by using a complexing agent or by adjusting the concentrations of individual ions or electrolysis time and annealed temperature.
These three kinds of complexing agents, sodium citrate have obviously effect for electrodeposition of CuInSe2 thin films. Cathodic shifts of the copper and selenium electrodeposition potentials with increasing citrate concentration are observed. On the contrary, the presence of citrate in the electrolyte does not change the indium electrodeposition potential but improves its crystallinity. The films electrodeposited between -0.5V and -0.6V vs Ag/AgCl led to the formation of (112) orientation. Therefore the deposited potential does not changed in other complexing agent, the electrostatic interaction between electrolyte and ion makes CuInSe2 films with a (112) preferential orientation thus their crystallinity is improved.
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