The effects of fluorine on the structural, surface morphology and optical properties of ZnO thin films

Yakuphanoglu F., Caglar Y., Ilican S., Caglar M.

PHYSICA B-CONDENSED MATTER, vol.394, no.1, pp.86-92, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 394 Issue: 1
  • Publication Date: 2007
  • Doi Number: 10.1016/j.physb.2007.02.014
  • Journal Name: PHYSICA B-CONDENSED MATTER
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.86-92
  • Keywords: thin film, optical band gap, ZnO, optical constant, SPRAY, TEMPERATURE, TRANSPARENT, AL
  • Anadolu University Affiliated: Yes

Abstract

The optical and structural properties of fluorine-doped Zinc oxide (ZnO) thin films have been investigated. The X-ray diffraction spectra indicate that the films have polycrystalline nature. A ZnO single phase with a hexagonal wurtzite structure was observed in structure of the films. The grain size for the films was calculated using a well-known Scherrer's formula and the obtained values are in the range of 27-40 nm. The values of direct band gap E-g(d) were determined and these values change with doped fluorine (F) content. The shift of absorption edge is associated with Burstein-Moss effect. The width of localized states in the optical band of the films change with F content and the E-U values change inversely with optical band gap values of the films. (c) 2007 Elsevier B.V. All rights reserved.