Enhancing UV photoconductivity of ZnO nanobelt by polyacrylonitrile functionalization

J. H. He*, Yen H. Lin, Michael E. McConney, Vladimir V. Tsukruk, Zhong L. Wang, Gang Bao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

128 Scopus citations

Abstract

UV photodetector fabricated using a single ZnO nanobelt (NB) has shown a photoresponse enhancement up to 750 times higher than that of a bare ZnO NB after coating with ∼20 nm plasma polymerized acrylonitrile (PP-AN) nanoscale film. The mechanism for this colossal photoconductivity is suggested as a consequence of the efficient exciton dissociation under UV illumination due to enhanced electron transfer from valence band of ZnO NB to the PP-AN and then back to the conduction band of ZnO. This process has demonstrated an easy and effective method for improving the performance of the nanowireNB-based devices, possibly leading to supersensitive UV detector for applications in imaging, photosensing, and intrachip optical interconnects.

Original languageEnglish (US)
Article number084303
JournalJournal of Applied Physics
Volume102
Issue number8
DOIs
StatePublished - Nov 5 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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