- 學位論文
無催化劑之一維氧化鋅奈米線之成長
The Study of Without Catalyst Zinc Oxide One-Dimensional Nanowire Growth
摘要
本論文是以無催化劑的方式在高溫爐管內將氧化鋅成長在玻璃基板上，系統壓力控制在60 torr，成長時間為40分鐘。以無催化劑成長的氧化鋅從XRD分析結果證實為具有纖鋅礦結構的氧化鋅，使用PL來測量其光學特性，顯示氧化鋅奈米線的近邊界發光(near-band-edge, NBE)具有很強的紫外線放射，紫外線能階約3.3eV，除紫外光外我們也觀察到深層發光(deep-levd-emission, DLE)的放射峰，深層發光的強弱是來自於奈米線的缺陷，如氧空缺、鋅間隙原子。研究的結果發現，650℃條件下所成長的奈米線結構最好線徑最小，NBE最強，DLE最弱的。
並列摘要
In the thesis,the catalyst-free ZnO nanowires on glass substrate were grown by high-temperature furnance. The pressure of the system was controlled at 60 torr,and the growth time was 40 minutes. It was found that the catalyst-free ZnO nanowires have the wurtzite structure by XRD analysis. The optical characteristics was measured by PL system. The ZnO nanowires display a strong UV band attributed to near-band-edge, (NBE) emission at around 3.3eV. Besides the UV emission were observed, the deep- level-emission, (DLE) peak was also observed. The orgin of DLE band is attributed to intrinsie defect, such as oxygen vancancy and zinc interstitial atoms; The study found, 650 ℃ under the conditions process temperature of growing nanowire structure of the smallest diameter is best, the NBE is the strongest, but the weakest of DLE. The grown nanowires with 650℃ grown condition have the smallest wire diameter, strongest NBE,and weakest DLE among all nanowires.