4.7 Article Proceedings Paper

Electrical transport in AZO nanorods

Journal

APPLIED SURFACE SCIENCE
Volume 352, Issue -, Pages 2-4

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.02.067

Keywords

AZO nanorods; Glancing angle deposition (GLAD); Electrical properties; Activation energy

Funding

  1. Directorate For Engineering
  2. Div Of Chem, Bioeng, Env, & Transp Sys [1159830] Funding Source: National Science Foundation

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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. (C) 2015 Elsevier B.V. All rights reserved.

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