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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 ValanarasuEmail author
  • V Ganesh
  • Mohd Shkir
  • S Alfaify
  • A Kathalingam
Article
  • 26 Downloads

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.

Keywords

Nd:CdO spray using perfume atomizer thin films optical and electrical properties 

Notes

Acknowledgements

We would like to express our gratitude to King Khalid University, Saudi Arabia for providing administrative and technical support.

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Copyright information

© Indian Academy of Sciences 2019

Authors and Affiliations

  1. 1.Department of PhysicsArumugam Pillai Seethai Ammal CollegeTiruppatturIndia
  2. 2.Department of PhysicsSree Sevugan Annamalai CollegeDevakottaiIndia
  3. 3.PG and Research Department of PhysicsArul Anandar CollegeKarumathurIndia
  4. 4.Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics, Faculty of ScienceKing Khalid UniversityAbhaSaudi Arabia
  5. 5.Millimeter-Wave Innovation Technology Research Center (MINT)Dongguk University-SeoulSeoulRepublic of Korea

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