研究生: |
吳翊甄 Yi-Zhen Wu |
---|---|
論文名稱: |
氧化鎳-還原氧化石墨烯-氧化鋅奈米複合結構之光感測器 NiO-Reduced Graphene Oxide-ZnO composite nanostructures for photodetectors |
指導教授: |
黃柏仁
Bohr-Ran Huang |
口試委員: |
黃柏仁
Bohr-Ran Huang 周賢鎧 Shyan-Kay Jou 章詠湟 Yung-Huang Chang |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
論文出版年: | 2019 |
畢業學年度: | 107 |
語文別: | 中文 |
論文頁數: | 109 |
中文關鍵詞: | 氧化鋅奈米柱 、還原氧化石墨烯 、氧化鎳 、紫外光感測器 |
外文關鍵詞: | ZnO nanorods, Reduced Graphene Oxide, NiO, UV photodetector |
相關次數: | 點閱:919 下載:4 |
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本論文主要分為四大部分,第一部分探討氧化鋅奈米柱在晶種層轉速不同下 對紫外光感測的影響,並進一步對其做物性及電性分析;第二部分探討在晶種層 加入還原氧化石墨烯後形成還原氧化石墨烯-氧化鋅奈米複合結構之變化,並觀 察在其晶種層轉速不同下對紫外光感測的影響,再對其做物性以及電性的分析; 第三部分探討在晶種層加入醋酸鎳後形成氧化鎳-氧化鋅奈米複合結構之變化, 並觀察在其晶種層轉速不同下對紫外光感測的影響,再對其做物性以及電性之分 析;第四部份探討在晶種層加入還原氧化石墨烯以及醋酸鎳後形成氧化鎳-還原 氧化石墨烯-氧化鋅奈米複合結構之變化,接著量測其晶種層在轉速不同下對紫 外光感測之變化,並對其做物性及電性之分析。
經過實驗及分析後發現加入 P 型材料:還原氧化石墨烯,結構的改變讓比表 面積與空乏區增大,暗電流下降進而使紫外光感測器之亮暗響應提高,其紫外光 亮暗響應從 517.95 提高至 1880.73。
除了還原氧化石墨烯,在第三部分的實驗還嘗試加入另一種 P 型材料:氧化 鎳,用一樣的原理來增加空乏區寬度,進而電阻上升,暗電流下降,氧化鎳-氧 化鋅奈米柱之紫外光亮暗響應提高至 5776.02。
最後綜合還原氧化石墨烯與氧化鎳之優點與氧化鋅奈米結構結合,以再次提 升紫外光響應,氧化鎳-還原氧化石墨烯-氧化鋅奈米柱之紫外光亮暗響應提高至 31116.6。
In this study, we report UV photodetectors (PDs) based on the combination of ZnO nanorods (ZNR), reduced graphene oxide (rGO) and nickel oxide (NiO) via a simple solution process. More briefly, we divide this study into four parts. The first part is about ZNR growth using different seed layer spin speed based UV PDs. The second part comprises the UV PDs based on rGO-ZNR with different seed layer spin speed and the third part explains UV PDs based on NiO-ZNR with different seed layer spin speed. The fourth part describes the UV PDs with the combinations of NiO-rGO-ZNR. From the overall studies, it was revealed that the as-prepared NiO-rGO-ZNR based PDs exhibit highly enhanced switch (IPhoto/IDark) ratio of 31,116.6 compared to those of NiO-ZNR (5776.02), rGO-ZNR (1880.73) and ZNR (517.95) based PDs. In addition, photo-responsivity (R), quantum efficiency (Q.E) and UV/Visible rejection ratio were also calculated using the responsivity vs wavelength curves. Obviously, the NiO-rGO-ZNR PDs shows the enhanced R (0.072 A/W), Q.E (24.38 %) and UV/Vis rejection ratio (4.49) compared to those of other PDs.
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