2021
DOI: 10.1021/acsami.1c19526
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A Polarization-Sensitive Self-Powered Photodetector Based on a p-WSe2/TaIrTe4/n-MoS2 van der Waals Heterojunction

Abstract: Polarization-sensitive photodetection is highly appealing considering its great important applications. However, the inherent in-plane symmetry of a material and the single structure of a detector hinder the further development of polarization detectors with high anisotropic ratios. Herein, we design a p-WSe 2 /TaIrTe 4 /n-MoS 2 (p−Ta−n) heterojunction. As a type-II Weyl semimetal, TaIrTe 4 with an orthorhombic structure has strong in-plane asymmetry, which is confirmed by angle-resolved polarized Raman spectr… Show more

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Cited by 30 publications
(27 citation statements)
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“…Some shortcomings have been overcome by constructing vdW heterostructures while sacrificing part of detectable range and response speed. [ 351–353 ]…”
Section: Device Applicationsmentioning
confidence: 99%
See 3 more Smart Citations
“…Some shortcomings have been overcome by constructing vdW heterostructures while sacrificing part of detectable range and response speed. [ 351–353 ]…”
Section: Device Applicationsmentioning
confidence: 99%
“…This obstruction can be weakened partly through fine control of interface engineering or constructing p‐WSM‐n heterostructures because more flexible separate doping control can be carried out for p and n regions (Figure 17j). [ 351 ] Moreover, the turn‐on threshold is also related to the light wavelength. As carriers are excited by high‐energy photons with greater kinetic energy, the barrier reflection is reduced and further affects the turn‐on threshold.…”
Section: Device Applicationsmentioning
confidence: 99%
See 2 more Smart Citations
“…Furthermore, a conventional photodetector requires an external power supply, which induces the circuit complexity of designing the devices and limits their application in special environments and situations. , Therefore, it is particularly important for fabricating self-powered high-performance photodetectors as they do not require an external voltage when operating and thus reduce energy consumption. In general, self-powered photodetectors can be achieved by constructing p–n junctions, Schottky junctions, and heterojunctions. Photogenerated electrons and holes are rapidly separated at the heterostructure interface through the built-in electric field, realizing the self-powered and rapid response of the photodetector.…”
Section: Introductionmentioning
confidence: 99%