PdSe 2 /2H–MoTe 2 Heterojunction Self-Powered Photodetector: Broadband Photodetection and Linear/Circular Polarization Capability

作者：Mengqi Che, Bin Wang, Xingyu Zhao, Yahui Li, Chunlu Chang, Mingxiu Liu, Yu Du, Liujian Qi, Nan Zhang, Yuting Zou, Shaojuan Li · 发表于：ACS Nano · 年份：2024 · DOI：10.1021/acsnano.4c12298 · 被引用次数：90 · 研究领域：2D Materials and Applications、Chalcogenide Semiconductor Thin Films、Perovskite Materials and Applications

In this research, we introduce a PdSe 2 /2H–MoTe 2 heterojunction photodetector that exhibits both broadband self-powered photodetection and linear/circular polarization detection capabilities. It has a broad spectral response range (covering 375–2200 nm) and reaches a peak sensitivity at 532 nm, exhibiting a notable responsivity of 7.3 × 10 3 A/W and a substantial specific detectivity of 8.5 × 10 12 Jones. Even in the near-infrared region of 1310 nm, it still has a high responsivity of 20 A/W. The self-powered photodetection capabilities of the PdSe 2 /2H–MoTe 2 heterojunction are equally impressive, covering a broad range from 375 to 1550 nm, with a responsivity of 243 mA/W, a specific detectivity of 6.46 × 10 10 Jones, a fill factor of 0.8, and an external quantum efficiency of 56.73%. Finally, simultaneous implementation of linear/circular polarization detection on the PdSe 2 /2H–MoTe 2 heterojunction provides a powerful solution for near-infrared full-Stokes polarization detectors with high integration, miniaturization, and portability.