溶胶凝胶法制备WS2-SiO2可饱和吸收体的探究

WS2二维材料独特的光吸收体特性使其成为可饱和吸收体的优选材料。溶胶凝胶法具有操作方便、设备简单、成本低廉等优点。利用溶胶凝胶法在石英基片上制备SiO2材料为主体的WS2-SiO2薄膜是一种实现可饱和吸收体的新思路。本文通过改变实验过程中原料配比、热处理条件、旋涂速度等实验参数确定出溶胶凝胶法制备SiO2薄膜的最佳条件，在此基础上再加入WS2溶液制备出WS2-SiO2薄膜可饱和吸收体，通过共聚焦显微镜、透射电子显微镜、拉曼光谱、X射线衍射等方法对制备的样品进行了测试分析，结果表明采用本文提出的制作方法可以得到外观良好的WS2-SiO2薄膜可饱和吸收体、WS2在 SiO2薄膜中呈多层的多晶颗粒，晶面指数主要为(002)、(004)、(101)、(103)、(006)、(105)。

Exploration of WS2-SiO2 Saturable Absorbers Prepared by the Sol-gel Method

Two-dimensional WS2 emerges as a competitive saturable absorber material because of its unique light absorber characteristics. As sol-gel method has the advantages of convenient operation, simple equipment, low cost and so on, so it will be cost-effective fabricating WS2-SiO2 films on the quartz substrate by sol-gel method to produce saturable absorbers. The optimum parameter combination forming the SiO2 film were determined by changing the ratio of raw materials, heat treatment conditions, coating speed and other experimental parameters in the experimental process. Then, WS2 solution was add in the process to prepare WS2-SiO2 saturable absorber based on the successful fabrication of the SiO2 film. After tested by the confocal microscopy, TEM, Raman and XRD methods, the WS2-SiO2 thin film saturable absorbers were found to have smoothing morphology, and WS2 particles in films were found in several layers dimension and polycrystalline structure with obvious crystal face preferred orientation of ( 002 )、(004)、(101)、(103)、(006)、(105).