PdSe<sub>2</sub>/2H-MoTe<sub>2</sub> Heterojunction Self-Powered Photodetector: Broadband Photodetection and Linear/Circular Polarization Capability.
basic_science · Level V
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- Record sourced from PubMed, PMID 39441187.
- Also identified by DOI 10.1021/acsnano.4c12298.
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Abstract
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.