4.8 Article

Polarization-Sensitive Detector Based on MoTe2/WTe2 Heterojunction for Broadband Optoelectronic Imaging

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JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 14, 期 47, 页码 10509-10516

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AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.3c02685

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In this study, a polarization-sensitive detector based on a MoTe2/WTe2 heterojunction was presented. It achieved wide spectral detection and high polarization sensitivity, showing potential for developing high-performance optoelectronic devices.
Polarization-sensitive detectors have significant applications in modern communication and information processing. In this study. We present a polarization-sensitive detector based on a MoTe2/WTe2 heterojunction, where WTe2 forms a favorable bandgap structure with MoTe(2 )after forming the heterojunction. This enhances the carrier separation efficiency and photoelectric response. We successfully achieved wide spectral detection ranging from visible to near-infrared light. Specifically, under zero bias, our photodetector exhibits a responsivity (R) of 0.6 A/W and a detectivity (D*) of 3.6 x 10(13) Jones for 635 nm laser illumination. Moreover, the photoswitching ratio can approach approximately 6.3 x 10(5). Importantly, the polarization sensitivity can reach 3.5 (5.2) at 635 (1310) nm polarized light at zero bias. This study both unveils potential for utilizing MoTe2/WTe2 heterojunctions as polarization-sensitive detectors and provides novel insights for developing high-performance optoelectronic devices.

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