Ye Kun, Yan Junxin, Liu Lixuan, Li Penghui, Yu Zhipeng, Gao Yang, Yang Mengmeng, Huang He, Nie Anmin, Shu Yu, Xiang Jianyong, Wang Shouguo, Liu Zhongyuan
School of Materials Science and Engineering, Anhui University, Hefei, 230601, P. R. China.
Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao, 066004, P. R. China.
Small. 2023 Jul;19(29):e2300246. doi: 10.1002/smll.202300246. Epub 2023 Apr 4.
2D materials with low symmetry are explored in recent years because of their anisotropic advantage in polarization-sensitive photodetection. Herein the controllably grown hexagonal magnetic semiconducting α-MnTe nanoribbons are reported with a highly anisotropic (100) surface and their high sensitivity to polarization in a broadband photodetection, whereas the hexagonal structure is highly symmetric. The outstanding photoresponse of α-MnTe nanoribbons occurs in a broadband range from ultraviolet (UV, 360 nm) to near infrared (NIR, 914 nm) with short response times of 46 ms (rise) and 37 ms (fall), excellent environmental stability, and repeatability. Furthermore, due to highly anisotropic (100) surface, the α-MnTe nanoribbons as photodetector exhibit attractive sensitivity to polarization and high dichroic ratios of up to 2.8 under light illumination of UV-to-NIR wavelengths. These results demonstrate that 2D magnetic semiconducting α-MnTe nanoribbons provide a promising platform to design the next-generation polarization-sensitive photodetectors in a broadband range.
近年来，由于二维低对称性材料在偏振敏感光探测方面具有各向异性优势，因此受到了广泛研究。本文报道了可控制生长的具有高度各向异性（100）表面的六角形磁性半导体α-MnTe纳米带，以及它们在宽带光探测中对偏振的高灵敏度，而六角形结构具有高度对称性。α-MnTe纳米带优异的光响应发生在从紫外（UV，360nm）到近红外（NIR，914nm）的宽带范围内，响应时间短，上升时间为46ms，下降时间为37ms，具有出色的环境稳定性和可重复性。此外，由于具有高度各向异性的（100）表面，α-MnTe纳米带作为光探测器在紫外到近红外波长的光照下，对偏振表现出极具吸引力的灵敏度，其二向色比高达2.8。这些结果表明，二维磁性半导体α-MnTe纳米带为设计下一代宽带范围内的偏振敏感光探测器提供了一个很有前景的平台。
