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Research on the optical properties of the ZnO thin film with the use of sol-gel method and spin coating method using 0.5 M concentrate solution of (Zn(CH 3 COO) 2 ·2H 2 O) and 30 mL isopropyl alcohol as a solvent has been carried out. The production process of ZnO solution and the fabrication of the thin film with the optical properties test of the thin film are included in the scope of this research. UV-Vis Spectroscopy is used to obtain the transmittance and absorbance values on each wavelength and the band gap energy value using the Tauc Plot method. The transmittance value obtained is directly proportional with the temperature. The absorbance value obtained is inversely proportional with the temperature due to higher temperature causes the reaction rate to become faster and in turn causes the absorbance value to become lower. The band gap energy value obtained is on the range of 3.23 eV – 3.27 eV and it fit with the literature.

Sintering temperature effect on optical properties of zinc oxide thin film on glass substrate prepared by sol-gel spin coating method