Abstract
Abstract Cadmium indium oxide powder was derived from calcination of cadmium indium sulphide prepared by a flux method. The material was confirmed by XRD. Thick films of this powder were prepared on glass substrates using screen-printing technique. CuO-modified CdIn 2 O 4 thick films were obtained by dipping technique in which Cu 2+ was incorporated as an additive into the CdIn 2 O 4 base material. The films were fired at 500 °C for 2 h. The films were characterized by SEM and EDAX. The electrical conductivity of the films was determined. The gas sensing performance of pure and modified CdIn 2 O 4 films were investigated for various gases. The films showed best response to chlorine gas. Modified films were found to be more sensitive than pure CdIn 2 O 4 to chlorine gas. The quick response (∼6 s) and fast recovery (∼22 s) are the main features of the modified sensor.
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