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Structure and optical properties of spin coated Zn0.9M0.1O (M: Cd, Mg) nanostructured films as transparent electrodes

AMRITPAL SINGH1, PRAVEEN KUMAR2,*

Affiliation

  1. Nanotechnology Research Centre, DAV Institute of Engineering and Technology, Kabir Nagar, Jalandhar-144008, India
  2. Department of Physics, DAV University, Sarmastpur, Jalandhar-144012, India

Abstract

The present work reports the effect of (Cd, Mg) doping on the optical and electrical properties of the zinc oxide for their probable application as transparent electrodes in modern display devices and organic solar cells. The effect of Cd and Mg incorporation on the structure, optical and electrical properties of sol gel synthesized ZnO films by X-ray diffraction, atomic force microscopy, UV-Vis spectroscopy, photoluminescence and electrical measurements. The X-ray diffraction study has revealed the hexagonal wurtzite crystal structure having preferential c-axis orientation for the Mg doped samples. The improvement in surface roughness with the decrease in the grain size has been observed for the Mg doped ZnO films. The formation of highly transparent films (>86%) along with the increase in the optical gap for the Mg doped films has been observed. The photoluminescence measurements revels the decrease in the defects for the Mg dopant as compared to the Cd in the ZnO films. The higher value of the optical transparency and electrical resistivity for the Mg doped samples will make them suitable for their application as transparent electrodes..

Keywords

Transparent conductors, Spin coating; XRD, UV–Vis spectroscopy, Fluorescence spectroscopy.

Submitted at: April 8, 2013
Accepted at: March 13, 2014

Citation

AMRITPAL SINGH, PRAVEEN KUMAR, Structure and optical properties of spin coated Zn0.9M0.1O (M: Cd, Mg) nanostructured films as transparent electrodes, Journal of Optoelectronics and Advanced Materials Vol. 16, Iss. 3-4, pp. 311-316 (2014)