Hydrothermal synthesis of ZnO thin films and its electrical characterization

Zelalem N. Urgessa, Oluwatobi S. Oluwafemi, Johannes R. Botha

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


We herein report the synthesis of ZnO thin films on a pre-treated p-type silicon substrate by hydrothermal method and its electrical characterization. The as-synthesized nanostructures were characterized by field emission scanning electron microscopy, X-ray diffraction and current-voltage measurements. The presence of citric acid (CA) in the solution resulted in a morphological change from well-aligned nanorods to relatively smooth, compact thin films. As the concentration of the citric acid increased from 1 mM to 5 mM, the thickness of the films decreased from 1.3 μm to 320 nm. All the as-grown nanostructures are crystalline and are preferentially oriented along the c-axis. Finally, the typical current-voltage measurements indicated that the thin films have better rectification with lower leakage currents.

Original languageEnglish
Pages (from-to)266-269
Number of pages4
JournalMaterials Letters
Publication statusPublished - 15 Jul 2012
Externally publishedYes


  • Diode
  • Growth conditions
  • Nano particles
  • Thin films
  • ZnO nanorods

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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