Enhanced Structural and Luminescent Properties of Carbon-Assisted ZnO Nanorod Arrays on (100) Si Substrate

Im Taek Yoon, Hak Dong Cho, Sejoon Lee, Dmitry V. Roshchupkin

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We have fabricated as-grown ZnO nanorods (NRs) and carbon-assisted NR arrays on semi-insulating (100)-oriented Si substrates. We compared the structural and luminescent properties of them. High-resolution transmission microscopy, field emission scanning electron microscopy, x-ray diffraction and energy-dispersive x-ray revealed that the as-grown ZnO NRs and carbon-assisted ZnO NRs were single crystals with a hexagonal wurtzite structure, and grew with a c-axis orientation perpendicular to the Si substrate. These measurements show that the carbon-assisted ZnO NRs were better synthesized vertically on an Si substrate compared to the as-grown ZnO NRs. Photoluminescence measurements showed that luminescence intensity of the carbon-assisted ZnO NRs was enhanced compared to the as-grown ZnO NRs. The enhanced luminescence intensity of the carbon-assisted ZnO demonstrates the possible improvement in the performance of photovoltaic nanodevices based on ZnO-like materials. This method can be applied to the fabrication of well-aligned ZnO NRs used widely in optoelectronic devices.

Original languageEnglish
Pages (from-to)4404-4411
Number of pages8
JournalJournal of Electronic Materials
Volume47
Issue number8
DOIs
StatePublished - 1 Aug 2018

Keywords

  • chemical vapor deposition
  • luminescence
  • single crystal
  • ZnO nanorods

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