本論文利用拉曼光譜，探討氧化鋅(ZnO)及摻雜不同比例鈷（Zn1-xCoxO x=0.025(4)、0.037(1)、0.067(2)）之高壓下的研究。而隨著摻雜比例的增加可以在450cm-1~500cm-1發現新的聲子振動模， 推斷是因為鈷的摻雜而產生的振動，而500cm-1~600cm-1的2B1low、A1(LO) 、E1(LO)聲子振動模越來越明顯，是因為更多Co2+取代Zn2+導致更多的不對稱性增加。另外以體積比為4：1 的甲醇（methanol）、乙醇(ethanol) (簡稱為ME)作為傳壓介質，在靜水壓下進行加壓，升壓過程中樣品會持續往高頻移動，而當加壓至(ZnO為8.87GPa，Zn0.975Co0.025O為8.32GPa，Zn0.963Co0.037O為8.19GPa，Zn0.933Co0.067O為8.10GPa)時，樣品會產生相變。而摻雜比例的增加導致相變點的提前，是因為鈷的原子半徑(1.25Å)較小於鋅的原子半徑(1.33Å)，而摻雜量越多越容易使結構越軟化，而導致氧化鋅由烏采結構轉變成氯化鈉結構的相變點提前。

In this study, Raman spectroscopy, explore zinc oxide (ZnO) doped with different proportions of cobalt (Zn1-xCoxO x = 0.025 (4), 0.037 (1), 0.067 (2)) under high pressure. With the increase in doping ratio in 450cm-1 ~ 500cm-1 discover new phonon mode, because of the vibration is cobalt doped ZnO generated. The 500cm-1 ~ 600cm-1 for 2B1low, A1 (LO), E1 (LO), TA + TO phonon vibration modes and more obvious, because the more Co2 + replaces Zn2 + leads to more asymmetry. Also a volume ratio of 4:1 methanol (methanol), ethanol (ethanol) (referred to as ME) as pressure medium, on hydrostatic pressure, the sample will continue to process high frequency movement, and when pressurized to (ZnO as 8.87GPa, Zn0.975Co0.025O as 8.32GPa, Zn0.963Co0.037O as 8.19GPa, Zn0.933Co0.067O is 8.10GPa), the sample will produce phase transition. The doping ratio result in increased early phase transition, because the cobalt atomic radius (1.25Å) smaller than zinc atomic radius (1.33Å), and the structure is more likely to soften when doping the more cobalt, resulting in zinc oxide structural transition from the wurtzit to the NaCl phase in advance.

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