研究生: |
劉錦淑 |
---|---|
論文名稱: |
硒化鎘鋅/硒化鋅 量子井系統的電光性質研究 Electrooptical properties of ZnCdSe/ZnSe quantum wells system |
指導教授: |
陸健榮
Lu, Chien-Rong |
學位類別: |
碩士 Master |
系所名稱: |
物理學系 Department of Physics |
論文出版年: | 2004 |
畢業學年度: | 92 |
語文別: | 中文 |
論文頁數: | 88 |
中文關鍵詞: | 量子井 、硒化鋅 、硒化鎘鋅 |
論文種類: | 學術論文 |
相關次數: | 點閱:204 下載:11 |
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本論文為研究硒化鎘鋅/硒化鋅(ZnCdSe/ZnSe)多重量子井樣品的電光性質。在光電導實驗中,譜形發生變化的能量位置約在ZnSe能隙附近,而在ZnCdSe與ZnSe能隙間譜形並無明顯變化。因而進行電場調制實驗及光激螢光實驗。
在電場調制實驗中,觀察到ZnCdSe/ZnSe多重量子井樣品受應力作用後的井內能階躍遷訊號,並以量子井內束縛態之一階微分勞倫茲譜形加以擬合,兩者結果相符合;並利用K-P模型推算出量子井內的能階躍遷能量,計算結果符合電場調制的實驗結果。從譜圖中發現ZnCdSe/ZnSe多重量子井內的能階躍遷訊號,隨著溫度越低,訊號越為明顯,以50K的訊號最為顯著。
在光激螢光實驗中,以高斯曲線加以擬合,發現隨著溫度升高,晶格受熱效應的影響,峰值能量往較低能量處移動,而螢光強度則隨溫度升高而逐漸減弱。
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