关键词: Se和MoSe2纳米片/
化学气相沉积/
发光
English Abstract
Structures and photoluminescence properties of Se and SeMo2 nanoflakes
Wang Bi-Ben1,Zhu Ke2,
Wang Qiang3
1.College of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China;
2.Division of Technical Support, Institute of Physics, Chinese Academy of Science, Beijing 100190, China;
3.State Key Laboratory for Surface Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190, China
Fund Project:Project supported by the National Natural Science Foundation of China (Grant No. 11474325).Received Date:23 September 2015
Accepted Date:12 November 2015
Published Online:05 February 2016
Abstract:Se and MoSe2 nanoflakes are prepared in N2 environment by hot filament chemical vapor deposition through using Se and MoO3 powders as the source materials. The structures and compositions of Se and MoSe2 nanoflakes are systemically studied by using field emission scanning electron microscope, transmission electron microscope, energy dispersive X-ray spectroscope, micro-Raman spectroscope, and X-ray photoelectron spectroscope. The results indicate that the mixing of the Se and MoO3 powders directly affects the formations and structures of Se and MoSe2 nanoflakes. When the Se and MoO3 powders are fully mixed, the Se nanoflakes are formed, however the MoSe2 nanoflakes are formed under no mixture of Se and MoO3 powders. This is due to the fact that different reactions of Se and MoO3 powders in gas environment with or without mixing the Se and MoO3 powders are generated. The study of photoluminescence properties indicates that the photoluminescence peaks are generated at about 774, 783 nm and 783, 784 nm for the Se and MoSe2 nanoflakes, respectively, which are different from the photoluminescence properties of monolayer MoSe2 nanosheet. These outcomes can enrich our knowledge of the synthesis and optical properties of two-dimensional Se-based nanomaterials and will contribute to the development of optoelectronic devices of two-dimensional Se-based nanomaterials.
Keywords: Se and MoSe2 nanoflakes/
chemical vapor deposition/
photoluminescence
