Polarization-sensitive, self-powered photodetector based on a SnO2/MoS2 van der Waals heterojunction

• DOI: 10.1364/ol.553699
• Publication Date: 2025-02-11T20:01:12Z
• Authors: Tong Xu; Yun Wei; Kai Tang; Shulin Sha; Peng Wan; Daning Shi; Mingming Jiang

Polarization-sensitive ultraviolet photodetectors have a wide range of applications in remote sensing, analytical imaging, information encryption, and anti-counterfeiting. Herein, one-dimensional tin dioxide (SnO 2 ) single crystals by using the chemical vapor deposition (CVD) method are reported. The high in-plane anisotropic structure, phonon vibrations, refractive index SnO experimentally elucidated. Based on CVD-grown crystals, mixed-dimensional /MoS van der Waals (vdWs) heterostructure is proposed to realize polarization-sensitive self-powered photodetector. Owing high-quality vdWs heterojunction, device exhibits pronounced photovoltaic performances. Significantly, anisotropy ratio devices can be as 4.2 compared 1.7 for pure devices. high-resolution polarization imaging capability was further demonstrated. Moreover, polarized image maintains an about 4.0 has excellent stability under long-term operating conditions without degradation. Our work provides strategy fabricating low-dimensional -based high-performance detection.