Electrical transport in AZO nanorods

Yildiz A., Cansizoglu H., Karabacak T.

Applied Surface Science, vol.352, pp.2-4, 2015 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Abstract
  • Volume: 352
  • Publication Date: 2015
  • Doi Number: 10.1016/j.apsusc.2015.02.067
  • Journal Name: Applied Surface Science
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2-4
  • Keywords: Activation energy, AZO nanorods, Electrical properties, Glancing angle deposition (GLAD)
  • Ankara Yıldırım Beyazıt University Affiliated: No

Abstract

Al-doped ZnO (AZO) nanorods (NRs) with different lengths were deposited by utilizing glancing angle deposition (GLAD) technique in a DC sputter system at room temperature. The structural and optical characteristics of the NRs were investigated by the X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-vis-NIR spectroscopy measurements. A band gap of about 3.5 eV was observed for the NRs. A novel capping process utilizing varying deposition angles was used to introduce a blanket metal top contact for the electrical characterization of NRs. Current-voltage (I-V) measurements were used to properly evaluate the approximate resistivity of a single NR. The electrical conduction was found to be governed by the thermally activated transport mechanism. Activation energy was determined as 0.14 eV from temperature dependent resistivity data.