UV photoresponse and field emission properties of ZnO single crystal microtubes

Jiping Cheng, Yunjin Zhang, Ruyan Guo

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations

Abstract

We present the UV photodetection properties and the field emission properties of ZnO single-crystal microtubes synthesized using a microwave-heating growth method. The ZnO microtubes exhibited relatively fast UV photoresponse with a cut-off wavelength ∼370 nm, indicating their potential application as UV detectors with high efficiency and low cost. The turn-on voltage for the as-grown and post-annealed ZnO microtube samples were 5.6 V/μm and 6.4 V/μm, respectively. The emission current density reached about 11 mA/cm2 for the as-grown sample at an applied field of 20 V/μm, and 12.5 mA/cm2 for the post-annealed sample at an applied field of 13 V/μm. Due to its relative large tip area (in comparison with ZnO nanomaterials) of the ZnO microtube, the intrinsic field emission enhancement factor β of the ZnO microtube was relatively low; however, the experimental β values were quite high, indicating strong field emission characteristics of the ZnO microtubes.

Original languageEnglish (US)
Pages (from-to)68-75
Number of pages8
JournalFerroelectrics
Volume382
Issue number1 PART 3
DOIs
StatePublished - Dec 1 2009
Event6th Asian Meeting on Ferroelectrics, AMF-6 - Taipei, Taiwan, Province of China
Duration: Aug 2 2008Aug 6 2008

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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