Study on the Effect of Annealing on Structural and SensingProperties of CdO Thin Films for (CO2 ,H2S) Gases

Abstract

Cadmium oxide (CdO) thin films have been deposited by Successive Ionic Layer Adsorption and Reaction (SILAR) method by using cadmium acetate at concentration 0.03 M and based solution from ammonium hydroxide on glass substrate. The structural and sensing properties of the as -deposited and annealed films are studied in details. The XRD and AFM analysis for its structural characteristic has been preformed .The average grain size of deposited film are increased after annealing . The sensing properties also are calculated and it is found that the sensitivity are increasing after annealing, and for CO2 gas are better than the sensitivity for H2S gas . The I-V properties are calculated for the films before and after annealing for the two gases.

Keywords

• transparent cdo thin film
• gas sensor
• silar
• nanostructure