硫化鎢納米結構制備及光學性質研究
發(fā)布時間：2018-08-03 12:50
【摘要】：單層WS_2具有超薄的厚度、高載流子遷移率、低電阻率、高開關比等優(yōu)點,在光電子器件和谷極化器件等方面具有重要的應用價值。大面積高質量的單層薄膜是開發(fā)WS_2基光電器件的重要前提。本論文針對高質量單層WS_2薄膜制備及其光學性質進行研究,取得如下結果:(1)利用低熔點鎢源,以化學氣相沉積法在SiO2/Si襯底上獲得了高發(fā)光質量的單層2H-WS_2三角片,其629.7 nm處發(fā)光峰半峰寬為18 nm(48 me V),且通過調節(jié)反應物鎢源與硫源的比例可分別獲得整片均勻發(fā)光或僅邊緣發(fā)光的WS_2薄膜。(2)對照研究藍寶石和SiO_2/Si襯底對單層WS_2拉曼模式和發(fā)光位置的影響。發(fā)現兩種襯底對單層WS_2存在相同的應力,但襯底表面不同的帶電雜質摻雜使藍寶襯底的單層WS_2薄膜發(fā)光峰藍移。(3)采用濺射法制備WS_2/Au復合材料,單層WS_2及WS_2/Au復合材料光學性質的對照分析發(fā)現,直接向單層WS_2表面沉積Au顆粒會導致其發(fā)光猝滅,但可以增強層間A1g(Γ)模式的拉曼振動。
[Abstract]:Single layer WS_2 has the advantages of ultra-thin thickness, high carrier mobility, low resistivity and high switching ratio. It has important application value in optoelectronic devices and valley polarization devices. Large area and high quality monolayer film is an important prerequisite for the development of WS_2 based optoelectronic devices. In this paper, the preparation and optical properties of high quality monolayer WS_2 thin films are studied. The results are as follows: (1) monoluminescent 2H-WS_2 triangles with high luminescence quality are obtained on SiO2/Si substrate by chemical vapor deposition with low melting point tungsten source. The half-width of the luminescence peak at 629.7 nm is 18 nm (48 me V),). By adjusting the ratio of reactant tungsten source to sulfur source, we can obtain a single WS_2 thin film with uniform luminescence or edge-only luminescence, respectively. (2) the Raman spectra of single layer WS_2 on sapphire and SiO_2/Si substrates are studied. The effect of mode and luminous position. It is found that the two substrates have the same stress on the monolayer WS_2, but different charged impurity doping on the surface of the substrate results in the blue shift of the luminescence peak of the monolayer WS_2 films on the Lambo substrates. (3) the WS_2/Au composites are fabricated by sputtering. By comparing the optical properties of monolayer WS_2 and WS_2/Au composites, it is found that the deposition of au particles directly on the surface of monolayer WS_2 leads to the luminescence quenching of au particles, but it can enhance the Raman vibration of the interlaminar A1g (螕) mode.
【學位授予單位】：長春理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TQ136.13;TB383.2
本文編號：2161799
[Abstract]:Single layer WS_2 has the advantages of ultra-thin thickness, high carrier mobility, low resistivity and high switching ratio. It has important application value in optoelectronic devices and valley polarization devices. Large area and high quality monolayer film is an important prerequisite for the development of WS_2 based optoelectronic devices. In this paper, the preparation and optical properties of high quality monolayer WS_2 thin films are studied. The results are as follows: (1) monoluminescent 2H-WS_2 triangles with high luminescence quality are obtained on SiO2/Si substrate by chemical vapor deposition with low melting point tungsten source. The half-width of the luminescence peak at 629.7 nm is 18 nm (48 me V),). By adjusting the ratio of reactant tungsten source to sulfur source, we can obtain a single WS_2 thin film with uniform luminescence or edge-only luminescence, respectively. (2) the Raman spectra of single layer WS_2 on sapphire and SiO_2/Si substrates are studied. The effect of mode and luminous position. It is found that the two substrates have the same stress on the monolayer WS_2, but different charged impurity doping on the surface of the substrate results in the blue shift of the luminescence peak of the monolayer WS_2 films on the Lambo substrates. (3) the WS_2/Au composites are fabricated by sputtering. By comparing the optical properties of monolayer WS_2 and WS_2/Au composites, it is found that the deposition of au particles directly on the surface of monolayer WS_2 leads to the luminescence quenching of au particles, but it can enhance the Raman vibration of the interlaminar A1g (螕) mode.
【學位授予單位】：長春理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TQ136.13;TB383.2
【參考文獻】
相關期刊論文 前2條
1 尹桂林;黃平華;余震;何丹農;涂江平;;MoS_2/WS_2共濺射復合薄膜的微結構及其摩擦磨損性能研究[J];摩擦學學報;2007年01期
2 馬林;夏軍保;陳衛(wèi)祥;李翔;徐鑄德;;WS_2納米帶的水熱合成與表征[J];浙江大學學報(工學版);2006年05期
相關博士學位論文 前1條
1 曹仕秀;二硫化鎢(WS_2)納米材料的水熱合成與光吸收性能研究[D];重慶大學;2015年
相關碩士學位論文 前3條
1 周書瑤;ZnS納米粒子的摻雜、等離子體熒光增強及生物功能化修飾[D];長春理工大學;2014年
2 周磊;反應濺射及共濺射制備WS_2/MoS_2/C復合薄膜[D];上海交通大學;2010年
3 鄧玉榮;Zns、WS_2和MoS_2納米材料的合成與表征研究[D];華中師范大學;2002年
，本文編號：2161799
本文鏈接：http://www.wukwdryxk.cn/kejilunwen/cailiaohuaxuelunwen/2161799.html
最近更新
教材專著
