氧化鋅因具有高度穩定激子表現許多優異光電性質，吸引許多基礎與應用導向研究者，尤其關注其載子能量弛放與螢光現象。對於激子參與的近能隙放射過程，目前已有相當了解，另一方面，涉及缺陷深層能態放射的機制仍有待釐清。本研究以磊晶與多晶氧化鋅為比較對象，觀察近能隙放射與深層能態放射的螢光。我們發現激發源性質對各放射譜峰相對強弱有顯著影響，不同觀察設置的效果反映螢光放射的異向性。本文探討放射機制，並估計氧化鋅的載子-聲子耦合強度。

Having highly stable excitons, zinc oxide (ZnO) exhibits excellent optoelectronic properties. This attracts many researchers interested in fundamental and application-oriented issues, especially that related to energy relaxations of carriers in ZnO and its luminescence behaviors. The excitonic processes leading to near-band-edge emission (NBE) have been well understood, whereas the understanding of deep-level emission (DLE) mechanisms still need to be clarified. In this work, taking epitaxial and polycryslline ZnO for comparison, NBE and DLE luminescence has been observed. We found that the relative intensities of various luminescence emissions depend significantly on the excitation source’s property and power. Anisotropy of the emissions is indicated by effects of using different incidence-collection setups. Mechanisms leading to the emissions and carrier-phonon coupling strengths in ZnO will be discussed.

第1章 文獻回顧與研究問題 1
1.1 半導體中載子-聲子交互作用與光致螢光 1
1.2 氧化鋅的螢光特性與載子-聲子耦合 2
1.3 研究問題 7
第2章 實驗方法 8
2.1 螢光實驗 8
2.2 氧化鋅樣品 11
第3章 實驗結果 13
3.1 氧化鋅的典型螢光光譜 13
3.2 室溫觀察 18
3.2.1 螢光光譜 18
3.2.2光譜特徵 23
3.3 變溫觀察 26
3.3.1 螢光光譜 26
3.3.2 溫度對光譜特徵的影響 30
第4章 討論與結論 37
4.1 實驗觀察總結 37
4.2 熱淬滅與聲子耦合 41
4.3 激發光功率相依與螢光放射機制 44
4.5 展望 46
參考文獻 47

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