Co dopant drives surface smooth and improves power factor of evaporated SnSe films
| Autor: | Guojian Li, Yi Yuan, Qiang Wang, Baohai Jia, Mingdi Lan, Shiying Liu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Electron mobility Materials science Dopant Process Chemistry and Technology Doping 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Chemical engineering Electrical resistivity and conductivity Seebeck coefficient 0103 physical sciences Materials Chemistry Ceramics and Composites Grain boundary Crystallite 0210 nano-technology Nanosheet |
| Zdroj: | Ceramics International. 46:16578-16582 |
| ISSN: | 0272-8842 |
| Popis: | Unstable nanosheet morphology of polycrystalline SnSe film becomes a limitation for its application in the field of waste heat recovery. This study dopes Co into the evaporated SnSe film to smooth the surface and to improve power factor. The results show that Co dopant makes the rough nanosheet change to surface densely packed structure. The dopant Co forms Co particles distributing around SnSe grain boundary, which suppress SnSe (011) plane growth and subsequent reduce nanosheet formation. In addition, Co dopant increases electric conductivity through increasing the carrier concentration, but the magnetism of Co particles decreases carrier mobility due to spin-charge coupling and also affects the Seebeck coefficient. The power factor thus is improved after doped Co. This study presents a method to fabricate polycrystalline SnSe film with smooth surface morphology and high power factor. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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