| 研究生: |
吳坤陽 Wu, Kun-Yang |
|---|---|
| 論文名稱: |
溶凝膠法製備含銀之AZO透明導電膜的研究 Preparation of Ag Nanoparticle-containing AZO Transparent Conducting Films by Sol-gel Method |
| 指導教授: |
陳東煌
Chen, Dong-Hwang |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 化學工程學系 Department of Chemical Engineering |
| 論文出版年: | 2005 |
| 畢業學年度: | 93 |
| 語文別: | 中文 |
| 論文頁數: | 111 |
| 中文關鍵詞: | 透明導電膜 、摻鋁氧化鋅 、奈米 、溶凝膠法 |
| 外文關鍵詞: | transparent conducting films, AZO, nano, sol-gel |
| 相關次數: | 點閱:85 下載:1 |
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本論文以溶凝膠法製備含銀奈米粒子之摻鋁氧化鋅(AZO)膠體溶液,經旋轉塗佈與熱處理製得含銀之AZO透明導電薄膜,探討不同製備方法之可行性、銀奈米粒子的混摻、與熱處理條件對薄膜光電性質的影響。
關於製備方法的設計與評估,主要以薄膜之導電性、可見光透光度、及均勻性為主要考量。評估醇還原法、鹼催化法、聯胺還原法及前驅鋁鹽種類(AlCl3與Al(NO3)3),發現以AlCl3為前驅鹽之醇還原法製備含銀AZO膠體溶液之最適合的方法,故以此方法為系統進一步探討銀含量對AZO薄膜性質的影響。
探討銀含量對AZO薄膜性質的影響,發現銀的混摻可明顯提升AZO薄膜的導電性;經600℃退火處理、400℃氫氣熱處理後,當Ag比例相較於Zn原子之含量達0.05 at.%時,其電阻係數可低至6.94×10-3 Ω•cm。以UV/VIS光譜儀分析薄膜光穿透度,發現含銀AZO薄膜之光穿透度與AZO薄膜差異不大,在可見光區的光穿透度皆可達85%以上。不過,當AZO薄膜有銀的添加時,可發現在波長範圍500nm附近的光穿透度會有略為下降的現象發生,主要係由於銀奈米粒子的特性吸收所致。
關於氫氣熱處理條件對薄膜性質影響的研究,以含0.10 at.% Ag之AZO薄膜進行不同溫度與壓力條件之氫氣熱處理,在熱處理溫度500℃及氣氛壓力達0.4 kg/cm2之條件下,薄膜電阻係數可更進一步降至1.72×10-3 Ω•cm,明顯低於相關技術文獻之相關值。
In the thesis, Ag nanoparticle-containing AZO colloid solutions were prepared by sol-gel method and further used to form the corresponding transparent conducting films via spin-coating and heat treatment. The elevation of various processes, and the effects of the addition of Ag nanoparticles and heat treatment on the optical property and conductivity of AZO films were studied.
According to the conductivity, the transparency in visible region, and the uniformity of thin films, various preparation methods were elevated and designed, including alcohol reduction method, organic base-catalyzed reduction method, hydrazine reduction method, and the use of aluminum salts (AlCl3 and Al(NO3)3). It was found that the alcohol reduction method with AlCl3 as the precursor was the most suitable one for the preparation of Ag nanoparticle-containing AZO films. Thus, this process was used for the followed investigations in this study.
By investigating the effect of the amount of Ag nanoparticles, it was found that the addition of Ag nanoparticles could significantly enhance the conductivity of AZO films. When the Ag content was 0.05 at.% relative to Zn, the electrical resistivity of AZO film was as low as 6.94×10-3 Ω•cm after annealing in air at 600℃ and heat treatment with hydrogen at 400℃. The UV/VIS spectra revealed that the transparency of Ag nanoparticle-containing AZO films has no significant difference from that of pure AZO films. The transmittance of Ag nanoparticle-containing AZO films was higher than 85% in the visible region. However, the addition of Ag nanoparticles might result in the slightly decrease of transmittance around 500 nm due to the optical absorption of Ag nanoparticles.
From the effect of heat treatment with hydrogen on the properties of AZO films, it was found that the electrical resistivity could be further decreased to 1.72×10-3 Ω•cm when Ag content was 0.10 at.% and the heat treatment with hydrogen was performed at 500℃ and a gauge pressure of 0.4 kg/cm2 . The electrical resistivity was much lower than the reported values of AZO films obtained by sol-gel method in the literature.
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