Photoresponse of wafer-scale palladium diselenide films prepared by selenization method

Chun Hin Mak, Shenghuang Lin, Lukas Rogée, Shu Ping Lau

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Palladium diselenide (PdSe2) films exhibit a high charge carrier mobility and sensitivity in photodetection. In this work, wafer-scale PdSe2 thin films with controllable thickness have been synthesized by the selenization of Pd films. A PdSe2-based photodetector can detect a broad wavelength ranging from 420 nm to 1200 nm. The responsivity and detectivity can reach 1.96 × 103 A W-1 and 1.72 × 1010 W Hz-1/2 at V SD = 3 V, respectively. The figure of merit of the photodetection are comparable to the mechanically exfoliated PdSe2 based photodetector. This work demonstrated that selenization is a facile method to synthesize PdSe2 films in large scale and the films are promising for broadband photodetection.

Original languageEnglish
Article number065102
JournalJournal of Physics D: Applied Physics
Volume53
Issue number6
DOIs
Publication statusPublished - 6 Feb 2020

Keywords

  • 2D layered material
  • field effect transistors
  • palladium diselenide
  • photodetection

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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