Effect of Nd doping on structural and opto-electronic properties of CdO thin films fabricated by a perfume atomizer spray method

M. Ravikumar, R. Chandramohan, K. Deva Arun Kumar, S. Valanarasu, V. Ganesh, Mohd Shkir, S. Alfaify, A. Kathalingam

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

A perfume atomizer-assisted spray pyrolysis method was employed to fabricate undoped and neodymium (Nd)-doped cadmium oxide (CdO) thin films. X-ray diffraction results reveal that all the films are polycrystalline with a cubic structure with a preferential orientation along the (200) direction. Scherrer’s formula was used to calculate the crystallite size of Nd-doped CdO films. Energy dispersive spectroscopy results show that Cd, Nd and O elements are present in Nd-doped CdO thin films. The optical absorption of the doped films is increased along with increasing Nd-doping level. The prepared CdO thin films have a high absorption coefficient in the visible region and the optical band gap is decreased on increasing Nd doping content. The electrical carrier concentration (n) of the deposited films is increased with increasing Nd doping concentration. Photoconductivity studies of a nanostructured Al/Nd-n-CdO/p-Si/Al device showed a non-linear electric characteristics indicating diode-like behaviour. Prepared Nd:CdO films could increase the photo-sensing effect of this n-CdO/p-Si heterostructure. These Nd-doped CdO thin films may open a new avenue for photodiode application in near future.

Original languageEnglish
Article number8
JournalBulletin of Materials Science
Volume42
Issue number1
DOIs
StatePublished - Feb 2019

Keywords

  • Nd:CdO
  • Optical and electrical properties
  • Spray using perfume atomizer
  • Thin films

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