Highly Polarization-Sensitive, Broadband, Self-Powered Photodetector Based on Graphene/PdSe 2 /Germanium Heterojunction

Polarization-sensitive photodetection in a broad spectrum range is highly desired due to the great significance in military and civilian applications. Palladium diselenide (PdSe2), a newly explored air-stable, group 10 two-dimensional (2D) noble metal dichalcogenide with a puckered pentagonal structure, holds promise for polarization-sensitive photodetection. Herein, we report a highly polarization-sensitive, broadband, self-powered photodetector based on graphene/PdSe2/germanium heterojunction. Owing to the enhanced light absorption of the mixed-dimensional van der Waals heterojunction and the effective carrier collection with graphene transparent electrode, the photodetector exhibits superior device…

• NN
  National Natural Science Foundation of China

  Awards: 91833303, 11604302, 61605174, 51821002, 61774136
• RG
  Research Grants Council, University Grants Committee

  Award: GRF 152093/18E PolyU B-Q65N
• HK
  Hong Kong Polytechnic University

  Awards: B-Q65N, 152093/18E
• PA
  Priority Academic Program Development of Jiangsu Higher Education Institutions

  Award: 111 Project
• CI
  Collaborative Innovation Center of Suzhou Nano Science and Technology

  Award: 51821002
• HE
  Higher Education Discipline Innovation Project

  Award: 51821002