articleAdvanced Functional MaterialsFeb 24, 2025BRONZE OA

High‐Sensitive Uncooled Mid‐Wave Infrared Photodetector Based on PtSe 2 /MoTe 2 Heterojunction with Fast Speed

XLXiao LiuCDChuyun DengHWHao WeiMFMengke FangBYBo Yan

National University of Defense Technology · Xiamen University of Technology · +1 more institution

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Abstract

Abstract Mid‐wave infrared (MWIR) sensing technology provides tremendous support for cutting‐edge applications in autonomous navigation, quantum information, and optical telecommunications. Recent researchers have reported substantial advancements in the MWIR photodetection based on 2D topological semimetal platinum selenide (PtSe 2 ). However, its application prospect has been constrained by limited sensitivity and sluggish response speed. Herein, an uncooled MWIR photodetector integrating PtSe 2 with MoTe 2 is reported, which features high responsivity ( R ) of 8.4–2.5 A W −1 and specific detectivity ( D* ) of 4.5 × 10 9 –1.3 × 10 9 cm Hz 1/2 W −1 from 2.75 to 4.25 µm. At 10.6 µm wavelength, it is still able…

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Topics & keywords

Topics
Keywords
  • Photodetector
  • Responsivity
  • Optoelectronics
  • Materials science
  • Photodetection
  • Specific detectivity
  • Infrared
  • Heterojunction
UN Sustainable Development Goals
  • Affordable and clean energy
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