Hu Xiang, Wang Yong, Yuan Jiaren, Liao Xiaxia, Zhou Yangbo
School of Physics and Materials Science, Nanchang University, Nanchang 330031, China.
Jiangxi Key Laboratory for Two-Dimensional Materials, Nanchang University, Nanchang 330031, China.
Materials (Basel). 2024 Aug 11;17(16):3998. doi: 10.3390/ma17163998.
Transition metal dichalcogenides (TMDs) are drawing significant attention due to their intriguing photoelectric properties, and these interesting properties are closely related to the number of layers. Obtaining layer-controlled and high-quality TMD is still a challenge. In this context, we use the salt-assisted chemical vapor deposition to grow multilayered MoSe flake and characterize it by Raman spectroscopy, second harmonic generation, and photon luminescence. Spectroscopic analysis is an effective way to characterize the stacking order and optoelectronic properties of two-dimensional materials. Notably, the corresponding mapping reflects the film quality and homogeneity. We found that the grown continuous monolayer, bilayer, and trilayer of MoSe sheets with different stacking orders exhibit distinctive features. For bilayer MoSe, the most stable stacking configurations are the AA' and AB order. And the uniformity of the spectroscopy maps demonstrates the high quality of the stacked MoSe sheets.
过渡金属二硫属化物（TMDs）因其引人入胜的光电特性而备受关注，并且这些有趣的特性与层数密切相关。获得层数可控且高质量的TMD仍然是一项挑战。在此背景下，我们使用盐辅助化学气相沉积法生长多层MoSe薄片，并通过拉曼光谱、二次谐波产生和光子发光对其进行表征。光谱分析是表征二维材料堆叠顺序和光电特性的有效方法。值得注意的是，相应的图谱反映了薄膜的质量和均匀性。我们发现，生长出的具有不同堆叠顺序的连续单层、双层和三层MoSe薄片呈现出独特的特征。对于双层MoSe，最稳定的堆叠构型是AA'和AB顺序。并且光谱图谱的均匀性证明了堆叠的MoSe薄片具有高质量。
