The Effect of Spin Coating Speed on Structural and Optical Properties of ZnO and ZnO/Dye Thin Films Synthesized by Sol-Gel Spin Coating Method

Abstract The ZnO thin films were successfully synthesized using sol-gel spin coating method. surface other film then coated with natural dye. Materials used zinc acetate dehydrate , isopropanol, Diethanolamine and purple heart flower consecutively as based materials, solution, stabilizer, grown glass by dropping Sol-gel on a of FTO speed variation 2000, 3000, 4000, 6000 rpm. successively pre-heated pot-heated at 250°C 550°C for 5 hours holding time 30 minutes. source the dye is boat lily was cut into small pieces put beaker glass. sample crushed mortar milling until it becomes soft. Further, extract obtained immersing in aquadest, acid, ethanol maceration technique. immersed an solution 24 to obtain ZnO/dye film. XRD analysis shows that size within 26.5 – 36.9 nm. optical properties ZnO/Dye characterized UV-Vis spectrometer. spectrometer results show there are variations transmission result higher than absorbance films. band gaps ranged 3.27 3.34 eV 3.02 3.21 eV.