PdSe<sub>2</sub>/2H–MoTe<sub>2</sub> Heterojunction Self-Powered Photodetector: Broadband Photodetection and Linear/Circular Polarization Capability
In this research, we introduce a PdSe<sub>2</sub>/2H-MoTe<sub>2</sub> 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<sup>3</sup> A/W and a substantial specific detectivity of 8.5 × 10<sup>12</sup> 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<sub>2</sub>/2H-MoTe<sub>2</sub> 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<sup>10</sup> 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<sub>2</sub>/2H-MoTe<sub>2</sub> heterojunction provides a powerful solution for near-infrared full-Stokes polarization detectors with high integration, miniaturization, and portability.
Authors
- Liujian Qi (ORCID: https://orcid.org/0000-0001-6090-304X)
- Mingxiu Liu (ORCID: https://orcid.org/0000-0003-3998-0491)
- Yu Du (ORCID: https://orcid.org/0000-0003-1406-1376)
- Shaojuan Li (ORCID: https://orcid.org/0000-0002-0504-2934)
- Nan Zhang (ORCID: https://orcid.org/0000-0001-8237-0512)
- Yahui Li (ORCID: https://orcid.org/0000-0002-3779-4911)
- Chunlu Chang
- Yuting Zou (ORCID: https://orcid.org/0000-0003-0720-6645)
- Mengqi Che
- Xingyu Zhao
- Bin Wang (ORCID: https://orcid.org/0000-0001-7665-6290)
Institutions
- Chinese Academy of Sciences (CN)
- Changchun Institute of Optics, Fine Mechanics and Physics (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- ACS Nano
- Published
- 2024-10-23
- DOI
- https://doi.org/10.1021/acsnano.4c12298
- Citations
- 66
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 7.73
Funders
- National Natural Science Foundation of China
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences
- National Key Research and Development Program of China