Surface-dominant transport properties in MoSe2 nanosheets
| Autor: | Chi Yang Chen, Tsu Yi Fu, Kuei Yi Lee, Cheng Maw Cheng, Yu Wen Chu, Hung Ru Chen, Chin Jung Ho, Ruei-San Chen, Yu Shin Chang, Manickam Anandan, Liang Chiun Chao |
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| Rok vydání: | 2022 |
| Předmět: |
Materials science
business.industry Photoconductivity Electron Carrier lifetime Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Responsivity Light intensity chemistry.chemical_compound Band bending chemistry Molybdenum diselenide Optoelectronics Electric current business |
| Zdroj: | Physica E: Low-dimensional Systems and Nanostructures. 135:114988 |
| ISSN: | 1386-9477 |
| DOI: | 10.1016/j.physe.2021.114988 |
| Popis: | The electronic transport and photoconduction properties of the molybdenum diselenide (MoSe2 ) nanosheets were investigated. The transfer length method analysis suggests the electric current following an anomalously two-dimensional (2D) flow rather than the general 3D mode. The 2D current implies a higher electron concentration and downward band bending at the surface. A broad spectral photoresponse from ultraviolet to near-infrared wavelengths was also observed for the MoSe 2 nanosheets. The optimal responsivity and photoconductive gain respectively at 58 A/W and 179 under the wavelengths at 405 nm were achieved. A surface-controlled photoconduction mechanism based on the surface band bending and electron accumulation is proposed to explain the long carrier lifetime and its dependence of light intensity and environment in MoSe 2 nanostructures . |
| Databáze: | OpenAIRE |
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