研究生: |
唐超 Chao - Tang |
---|---|
論文名稱: |
不同觸媒對溫度控制成長硫化鋅一維奈米結構之影響 The Effects of Catalysts on the Temperature-controlled Growth of One-dimensional Zinc Sulfide Nanostructures |
指導教授: |
郭東昊
Dong-Hau Kuo 鄭如茵 Ju-Yin Cheng |
口試委員: |
周振嘉
Chen-Chia Chou 林惠娟 none |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 材料科學與工程系 Department of Materials Science and Engineering |
論文出版年: | 2009 |
畢業學年度: | 97 |
語文別: | 中文 |
論文頁數: | 104 |
中文關鍵詞: | 硫化鋅 、一維材料 、奈米結構 |
外文關鍵詞: | ZnS, one-dimensinal materials, nanostructures |
相關次數: | 點閱:453 下載:7 |
分享至: |
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硫化鋅因具有3.7eV的能帶差,且是直接能隙材料,所以一直被視為極具有潛力的光電材料之一。硫化鋅也是第一個被發現的半導體之一,並且至今已應用在許多不同的領域中,比如:光電元件、發光二極體、平面顯示器、感測器與太陽能電池等。本篇論文將分為兩部分,第一部分先利用不同溫度揮發鋅源與硫源,於鍍金的矽基板上成長不同形態的硫化鋅一維奈米結構;第二部分則分別在矽基板上鍍上金、鐵、錫、銦等雙層觸媒組合,探討不同觸媒對於成長硫化鋅一維奈米結構的影響。
第一部分分別將獨立鋅源、硫源與基板放置於不同溫區成長硫化鋅一維奈米結構。經過SEM顯微結構的觀察,基板置於800℃、鋅源於800℃與硫源300℃可成長出大量且純度高的硫化鋅奈米線,並在PL光譜儀分析中觀測到因本質缺陷所導致的520nm左右的高強度純綠光波峰。
第二部分則是在矽基板上濺鍍金、鐵、錫、銦等雙層觸媒組合並置入系統中成長硫化鋅奈米結構。經過SEM顯微結構的觀察,除了可發現奈米線與奈米帶等原本形態外,也可發現到奈米棒與奈米環等不同結構。
Zinc sulfide(ZnS), as a II-VI semiconductor with a band gap energy of 3.7 eV, has received much attention due to its excellent properties, such as large band-gap energy, direct recombination and resistance to high electric field. Zinc sulfide is also one of the first semiconductors discovered and probably one of the most important materials in the electronics in a wide range of applications, including optical devices, LED, flat panel displays, sensors, and solar cells etc.
In the first part of our study, one-dimensional ZnS nanostructures such as nanowires and nanobelts were fabricated by controlling the temperatures of substrates, Zinc source, and Sulfur source individually. The characteristics and optical properties were analyzed by XRD, SEM, TEM, and PL spectra. Large scale and high purity nanowires were synthesised at the conditions of substrates temperature at 800℃, Zinc source at 800℃, Sulfide source at 300℃. From PL spectra, the ZnS nanowires have a PL band position with strong green emission band centered at about 520nm.
In the second part of our study, ZnS nanostructures were grown on the Si substrates coated with two metallic layers of Au, Fe, In or Sn. Except for nanowires and nanobelts, nanorods and nanorings were also observed by using SEM.
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