期刊
FUNDAMENTAL RESEARCH
卷 2, 期 6, 页码 985-992出版社
KEAI PUBLISHING LTD
DOI: 10.1016/j.fmre.2022.02.008
关键词
Layered SnSe; In-plane anisotropy; Polarization-sensitive photodetector; Fast response; Wide spectrum
资金
- National Natural Science Foundation of China [62125404]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB30000000]
This study reports the synthesis of an in-plane anisotropic SnSe nanosheet using angle-resolved polarized Raman spectroscopy, polarization-resolved optical microscopy, and angle-resolved optical absorption spectroscopy. The SnSe nanosheet exhibits high anisotropic photocurrent ratio, high responsivity, and fast response. These findings provide a new method for fabricating 2D fast-response polarization-sensitive photodetectors in the future.
Tin selenide (SnSe) has attracted considerable interest recently on account of its low-symmetry lattice structure, great compatibility with key semiconductor technology, and remarkable electrical and optical performance. SnSebased polarization-sensitive photodetectors show promising application prospects because of their fast response and excellent photoelectric performance. Here, an in-plane anisotropic SnSe nanosheet was synthesized and reported in detail by applying angle-resolved polarized Raman spectroscopy (ARPRS), polarization-resolved optical microscopy(PROM), angle-resolved optical absorption spectroscopy (AROAS), and other crystal structure characterization methods. Moreover, SnSe crystals exhibit superior polarization detection performance with a high anisotropic photocurrent ratio (2.31 at 1064 nm) due to the structure formed by the Van der Waals superposition of covalently bonded atomic layers. Furthermore, SnSe-based photodetectors have high responsivity (9.27 A/W), high detectivity (4.08 x10(10) Jones), and fast response (in the order of nanoseconds). These results suggest a new method for fabricating 2D fast-response polarization-sensitive photodetectors in the future.
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