The studies that are related to transparent conducting oxides and the consistent motivation to improve their different characteristics have been increasingly conducted. In this work, pristine and Aluminium doped cadmium oxide, CdO: Al thin films, were synthesized by a deposition over a substrate made from glass employing spray pyrolysis technique for several Al fractions (0, 3.0, and 6.0) v/v %. The effect of Al dopant on the microstructure, morphological, optical and electrical characterisation of CdO thin films were investigated elaborately. Pure CdO and (Al: CdO) exhibited face centred cubic structure with strong peak of 200 that reflected a preferential growth. The roughness of films was increased for the samples doped with Al from (38.54 to 149.2) nm according to the increment in Al concentration. The optical analysis confirmed that the value of band gap manifested a decrement (2.5 - 2.0) eV associated with the increment in doping by Al. The measurements of Hall Effect elucidated that the CdO and Al: CdO films classified as n-type semiconductors. The range of electrical conductivity of the Al: CdO films evinced a variation from (42.4 to 35.3) Ω-1.cm- 1. The results concluded from some graphs emphasized that the activation energy is equal to zero, and the Al doped CdO films became a degenerated semiconductor.
Sabah Sadeq, Noor; A. Hassan, Mustafa; and G. Mohammadsalih, Zaid
"Preparation and Study of Properties of CdO: Al Thin Films Prepared by Chemical Spraying,"
International Journal of Thin Film Science and Technology: Vol. 11
, PP -.
Available at: https://digitalcommons.aaru.edu.jo/ijtfst/vol11/iss1/13