摻雜Fe之MoS2物性之研究

Studies of physical property in MoS2 doped with Fe .

高晧哲(Hao-Che Kao)

指導教授 ： 楊仲準

中原大學/理學院/奈米科技碩士學位學程/碩士(2017年)

https://doi.org/10.6840/cycu201700633

摘要

本論文以水熱合成法製成Fe0.05Mo0.95S2二維結構的材料。X光繞射(XDR, X-Ray Diffraction )之結果顯示具二維特性之不對稱之繞射峰。經過理論計算與實驗交互疊代運算與比對，顯示材料主要屬於2H結構。透過拉曼光譜的實驗可知材料確實形成FexMo1-xS2，但表面具有部分的Mo-O鍵結。
Fe0.05Mo0.95S2在室溫低頻環境下之交流電性屬於電阻性之電傳輸行為。隨著溫度下降，漸轉為電容性。而變溫電阻實驗顯示在35 K時有一個金屬-絕緣體相變。利用電導率公式，計算出樣品在150 K至250 K，以及250 K至300 K間的躍遷能量值分別為148 meV及92 meV。

關鍵字

過渡金屬二硫化物 ； X光繞射 ； 二維材料

並列摘要

Two-dimensional Fe0.05Mo0.95S2 material was made by hydrothermal method. XRD (X-ray Diffraction) results exhibited an asymmetric diffraction peak with two-dimensional characteristics. Theoretical calculation and experimental results show that the material was mainly composed of 2H structure. Raman spectroscopy experiments confirmed that the material was formed as FexMo1-xS2. Otherwise, the surface has a part of the Mo-O bond.
Fe0.05Mo0.95S2 is an resistive load at room temperature with low frequency, and it turned to capacitive load at low temperature. The temperature profile of resistance shows that there is a metal-insulator phase transition at 35 K. The energy gap between 150 K and 250 K and 250 K to 300 K were calculated to be 148 meV and 92 meV, respectively.

並列關鍵字

TMDs ； XRD ； 2D material

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