Hollow Spherical Nanoshell Arrays of 2D Layered Semiconductor for High‐Performance Photodetector Device |
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| Authors: | Xiaoshuang Chen Huihui Yang Guangbo Liu Feng Gao Mingjin Dai Yunxia Hu Hongyu Chen Wenwu Cao PingAn Hu Wenping Hu |
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| Affiliation: | 1. Key Lab of Microsystem and Microstructure of Ministry of Education, Harbin Institute of Technology, Harbin, P. R. China;2. Department of Physics, Harbin Institute of Technology, Harbin, P. R. China;3. Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin, China;4. Academy of Fundamental and Interdisciplinary Science, Harbin Institute of Technology, Harbin, China;5. Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, P. R. China |
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| Abstract: | Well‐defined hollow spherical nanoshell arrays of 2D transitional metal dichalcogenide (TMDC) nanomaterials for MoSe2 and MoS2 are grown via chemical vapor deposition technique for the first time. The hollow sphere arrays display the uniform dimensions of ≈450 nm with the shell thickness of ≈10 nm. The unique hollow sphere architecture with increased active surface area is forecasted to supply more efficient route to improve light‐harvesting efficiency through repeated light reflection and scattering inside the hollow structure without decay of response and recovery speed, because exceptional “SP–SP” junction barriers conducting mechanism can facilitate carriers tunneling and transport during the electron transfer procedure within the present particular structure. The MoSe2 hollow sphere photodetector exhibits an outstanding responsivity (8.9 A W?1), which is tenfold higher than that for MoSe2 compact film (0.9 A W?1), fast response and recovery speed, and good durability under illumination wavelength of 365 nm. Meanwhile, MoSe2 hollow sphere arrays on flexible polyethylene terephthalate substrates reveal excellent bending stability. Therefore, this research indicates that unique hollow sphere architecture of 2D TMDC materials will be an anticipated avenue for efficient photodetector devices with far‐ranging capability. |
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| Keywords: | 2D materials hollow spheres MoSe2 nanoshell arrays photodetectors |
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