Abstract

The effects of an embedded silver layer on the electrical and optical properties of zinc oxide (ZnO)/silver (Ag)/zinc oxide (ZnO) layered composite structures on polymer substrates have been investigated. We have engineered transparent conducting oxide structures with greatly improved conductivity. Optical and electrical properties are correlated with Ag thickness. Film thicknesses were determined using Rutherford backscattering spectrometry. Hall effect, four-point probe, and UV-Vis spectrophotometer analyses were used to characterize electrical and optical properties. The results show that carrier concentration, mobility, and conductivity increase with Ag thickness. Increasing Ag thickness from 8 to 14 nm enhances sheet resistance and resistivity by six orders of magnitude. The optical transmittance of the composite structure decreases when compared to a single ZnO layer of comparable thickness. However, a composite with 12 nm of Ag provides conductivity and transmittance values that are acceptable for optoelectronic devices. We describe of the influence of Ag thickness on electrical and optical properties of the ZnOAgZnO composite and propose a conduction mechanism for this system.

Original languageEnglish (US)
Article number013708
JournalJournal of Applied Physics
Volume103
Issue number1
DOIs
StatePublished - 2008

Fingerprint

zinc oxides
silver
conductivity
electrical properties
optical properties
composite structures
transmittance
silver oxides
conduction
composite materials
spectrophotometers
optoelectronic devices
Hall effect
backscattering
film thickness
electrical resistivity
oxides
probes
polymers
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

Cite this

Improved conductivity and mechanism of carrier transport in zinc oxide with embedded silver layer. / Han, H.; Theodore, N. D.; Alford, Terry.

In: Journal of Applied Physics, Vol. 103, No. 1, 013708, 2008.

Research output: Contribution to journalArticle

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