Solution-processable pyrite FeS 2 nanocrystals for the fabrication of heterojunction photodiodes with visible to NIR photodetection

Di Yan Wang, You Ting Jiang, Chih Cheng Lin, Shao Sian Li, Yaw Tyng Wang, Chia Chun Chen*, Chun Wei Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

104 Citations (Scopus)

Abstract

A heterojunction photodiode with NIR photoresponse using solution processable pyrite FeS 2 nanocrystal ink is demonstrated which has the advantages of earth-abundance and non-toxicity. The device consists of a FeS 2 nanocrystal (NC) thin film sandwiched with semiconducting metal oxides with a structure of ITO/ZnO/FeS 2 NC/MoO 3/Au, which exhibits an excellent photoresponse with a spectral response extended to NIR wavelengths of up to 1150 nm and a high photocurrent/dark current ratio of up to 8000 at -1 V under AM1.5 illumination (100 mW cm -2).

Original languageEnglish
Pages (from-to)3415-3420
Number of pages6
JournalAdvanced Materials
Volume24
Issue number25
DOIs
Publication statusPublished - 2012 Jul 3

Keywords

  • FeS nanocrystals
  • iron pyrite
  • photodetection
  • photodiodes
  • solution-processable

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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