Photovoltaic high-performance broadband photodetector based on MoS2/Si nanowire array heterojunction

Di Wu, Zhenhua Lou, Yuange Wang, Zhiqiang Yao, Tingting Xu, Zhifeng Shi, Junmin Xu, Yongtao Tian, Xinjian Li, Yuen Hong Tsang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

39 Citations (Scopus)

Abstract

Photovoltaic MoS2/Si nanowire array (SiNWA) heterojunction photodetectors (PDs) are constructed and investigated, which exhibit excellent photoresponse properties to light illumination at wavelengths from the deep ultraviolet to the near-infrared. Further photoresponse analysis reveals that a high responsivity of 53.5 A/W and a specific detectivity of 2.8 × 1013 Jones, as well as fast response speeds of 2.9/7.3 μs at 50 kHz are achieved in a MoS2/SiNWA heterojunction device. The high performances could be attributed to the high-quality heterojunction between MoS2 and the SiNWA. Such high performances of MoS2/SiNWA PDs are much better than those of previously reported MoS2-based PDs, suggesting that MoS2/SiNWA heterojunction devices have great potential in optoelectronic applications.

Original languageEnglish
Pages (from-to)272-280
Number of pages9
JournalSolar Energy Materials and Solar Cells
Volume182
DOIs
Publication statusPublished - 1 Aug 2018

Keywords

  • Heterojunction
  • Molybdenum disulfide
  • Photodetectors
  • Self-powered
  • Si nanowire arrays

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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