Temperature Dependence of General Properties of Cd-O thin Films Prepared by Nebulized Spray Pyrolysis Technique

M Anitha, V Tamilnayagam, N Anitha, K Pakiyaraj, L Amalraj
2016 International Journal of Inventions in Computer Science and Engineering   unpublished
Polycrystalline transparent conducting cadmium oxide thin films were synthesized by inexpensive method of nebulized spray pyrolysis technique at five different substrate temperatures (150, 175, 200, 225 and 250˚C) on amorphous glass substrates with precursor Polycrystalline transparent conducting cadmium oxide thin films were synthesized by inexpensive method of nebulized spray solution of cadmium acetate dehydrates. These thin films had a preferential orientation along the (111) plane having
more » ... 111) plane having face centered cubic structure. Surface morphology of these thin films changed from closely packed cauliflower structure to well define grain the substrate temperature had increased. Transparency of these samples had increased from 75% to 90% at longer wavelengths (900 nm-1100 nm) with increase in substrate temperature. Optical band gap decreased from 2.4eV to 2.25eV belonging to direct transition with increase in substrate temperature. Presence of vibration band at 675 cm-1 corresponding to Cd-O bondwas confirmed by FTIR spectrum. A minimum resistivity of 97ῼ cm was determined for the film coated at 150˚C with activation energy of 0.01 eV.
fatcat:lmidi6pa45aeve6n7fksw6pcbi