Abstract
The synthesis of ZnO thin film has been successfully carried out using the sol-gel spin coating method. The production of ZnO thin film was grown on a glass substrate with a rotation speed of 5000 rpm and calcined with pre-heating temperature variations of 250, 300 and 350°C and post-heating at a temperature of 550°C. The results of the characterization of ZnO thin films with XRD showed that all crystal structures in the form of hexagonal wurtzite with the largest crystal size for 350°C pre-heating temperature were 35.3 nm. Morphology of ZnO thin films resulting from SEM characterization in the form of crystallite granules and most of them are round and almost uniform and compact. The results of the characterization of ZnO thin film with UV-Vis showed the highest transmittance value for 350°C pre-heating temperature was 53.9%. The highest absorbance value for 250°C pre-heating temperature is 1,192. The biggest energy band gap value for 350°C pre-heating temperature is 3.15 eV.
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