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


Cadmium oxide (CdO) thin films have been deposited by Successive IonicLayer Adsorption and Reaction (SILAR) method by using cadmium acetate atconcentration 0.03 M and based solution from ammonium hydroxide on glasssubstrate. The structural and sensing properties of the as -deposited and annealedfilms are studied in details. The XRD and AFM analysis for its structuralcharacteristic has been preformed .The average grain size of deposited film areincreased after annealing . The sensing properties also are calculated and it isfound that the sensitivity are increasing after annealing, and for CO2 gas arebetter than the sensitivity for H2S gas . The I-V properties are calculated for thefilms before and after annealing for the two gases.