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A facile way to optimize thermoelectric properties of SnSe thin films via sonication-assisted liquid-phase exfoliation |
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| Authors: | Van Duong Thiet Chung Nguyen Xuan Phan Hong Ngoc Nguyen Hong Tuan Nguyen Dung Dinh Le Lu Trong Van Pham Nhat |
| Affiliation: | 1.Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, 100000, Vietnam ;2.Department of Physics, Hanoi University of Mining and Geology, Hanoi, 100000, Vietnam ;3.Center for High Technology Development, Vietnam Academy of Science and Technology, Hanoi, 100000, Vietnam ;4.Institute for Tropical Technology, Vietnam Academy of Science and Technology, Hanoi, 100000, Vietnam ;5.Department of Advanced Materials Science and Nanotechnology, University of Science and Technology Hanoi, Hanoi, 100000, Vietnam ; |
| Abstract: | In our work, SnSe nanosheets and nanostructured thin films were successfully synthesized via sonication-assisted exfoliation and coating process. The SnSe nanosheets respond to a uniform lateral size, with two to three single layers by 2.82 nm and 280 nm2 of average thickness and average area, respectively. The results were confirmed by Scanning Electron Microscope, Transmission Electron Microscope, and Atomic Force Microscope. X-ray diffraction and Raman spectra indicate that the SnSe nanosheets have high crystalline quality along a-axis. The SnSe nanostructured thin films were prepared in various thicknesses from 350 to 650 nm. The highest power factor value is achieved at 450 nm in 375–600 K temperature range. A simple method of fabrication and controllable thermoelectric properties of SnSe nanostructured thin films as well as other two-dimensional (2D) materials are introduced. |
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