Absorption and dispersion studies of thermally evaporated nanocrytallite structure ZnIn2Se4 thin films

Issue		Eur. Phys. J. Appl. Phys. Volume 45, Number 3, March 2009


Article Number		30601
Number of page(s)		6
Section		Nanomaterials and Nanotechnologies
DOI		10.1051/epjap/2009009
Published online		06 February 2009

Eur. Phys. J. Appl. Phys. 45, 30601 (2009)
DOI: 10.1051/epjap/2009009

Absorption and dispersion studies of thermally evaporated nanocrytallite structure ZnIn₂Se₄ thin films

H.M. Zeyada, M.S. Aziz and A.S. Behairy

Department of Physics, Faculty of science at Damietta, New Damietta 34517, Egypt

hzeyada@gmail.com

Received: 4 May 2008 / Received in final form: 5 December 2008 / Accepted: 12 December 2008 / Published online: 6 February 2009

Abstract
ZnIn₂Se₄ has a polycrystalline structure in as synthesized condition. It transforms to nanostructure grains of ZnIn₂Se₄ upon thermal deposition as thin films. The optical properties of as deposited ZnIn₂Se₄ films are studied using spectrophotometer measurements of transmittance and reflectance at normal incidence of light in wavelength range (450–2500) nm. The refractive index and absorption index are calculated and it is found that they are independent of film thickness in the thickness range (500–790) nm. Absorption analysis showed two types of electronic transitions; indirect allowed transition with energy gap 1.76 eV accompanied by phonon of energy 25 meV and direct allowed transition with energy gap 2.3 eV. The dispersion analysis showed that the oscillator energy, dispersion energy, dielectric constant at infinite frequency and lattice dielectric constant are 2.49 eV, 14.36 eV, 6.84 and 8.17, respectively.

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.