Enhanced field emission of well-aligned ZnO nanowire arrays illuminated by UV

Chih Han Chen, Shoou Jinn Chang, Sheng Po Chang, Yao Ching Tsai, I. Cherng Chen, Ting Jen Hsueh, Cheng Liang Hsu

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

Vertical zinc oxide nanowires, used as electron emitters, were synthesized on ZnO:Ga/glass substrate by a vapor-liquid-solid process without a catalyst. The nanowires, 5 μm long and 50-250 nm in diameter, were grown with a preferred (0 0 2) orientation and a small XRD full-width at half-maximum intensity. Illumination of ZnO nanowires by UV improved their field emission attributes, reducing their turn-on electric field to 2.1 V/μm at a current density of l μA/cm2. This phenomenon is attributed to the generation of a large number of hole-electron pairs by UV illumination.

Original languageEnglish
Pages (from-to)176-179
Number of pages4
JournalChemical Physics Letters
Volume490
Issue number4-6
DOIs
Publication statusPublished - 2010 Apr 26

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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