Polarization-sensitive near-infrared photodetectors based on quasi-one- dimensional Sb2Se3 nanotubes

In this work, we study the chemical vapor deposition growth of Sb2Se3 nanotubes and investigate their novel applications in polarization-sensitive near-infrared photodetectors. The grown Sb2Se3 nanotubes present a high crystal quality with an average length of 23.96 mu m, an average width of 0.99 mu m, and an average height of 315 nm. The fabricated singular Sb2Se3 nanotube-based photodetector exhibits a wide spectral response, ranging from visible to near-infrared light regions (400-980 nm), as well as a peak photo -response under the illumination of near-infrared (830 nm) light. At room temperature and standard at-mospheric pressure, the Sb2Se3 nanotube photodetector presents a large photocurrent on/off ratio of 364, a high responsivity of 4.39 A W-1, a good specific detectivity of 9.63 x 1010 Jones, and a high external quantum efficiency of 655% under the illumination of 830 nm light. The identified performance can be attributed to intrinsic characteristics of this compound coupled with a highly uniform Sb2Se3 nanotube crystalline structure. The Sb2Se3 nanotube photodetector also exhibits excellent stability after > 200 photo-switching cycles. Most notably, the Sb2Se3 nanotube photodetector presents a large linear dichroic ratio of 3.95 under the illumination of 830 nm light, revealing its great potential in near-infrared polarized photodetection applications.(c) 2022 Elsevier B.V. All rights reserved.

Automated summary

In this study, Sb2Se3 nanotubes were grown by chemical vapor deposition and their novel applications in polarization-sensitive near-infrared photodetectors were investigated. The grown Sb2Se3 nanotubes exhibited high crystal quality and specific dimensions. The fabricated singular Sb2Se3 nanotube-based photodetector showed a wide spectral response and excellent performance under the illumination of near-infrared light.