Absorbance Dependence of ZnO Thin Films on Post-heating Temperature
Iwan Sugihartono1*, Ayusa Rizka Putri1, Tan Swee Tiam2, Ucu Cahyana3, Erfan Handoko1, Setia Budi3, Riser Fahdiran1, Cecep Rustana1, Anggara Budi Susila1, Esmar Budi1

1Program Studi Fisika, FMIPA, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Rawamangun, Jakarta Timur, Indonesia 13220
2School of Energy and Chemical Engineering, Xiamen University Malaysia, Jalan Sunsuria, Bandar Sunsuria, 43900 Sepang, Selangor Darul Ehsan, Malaysia
3Program Studi Kimia, FMIPA, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Rawamangun, Jakarta Timur, Indonesia 13220

Abstract

We have prepared ZnO thin films on indium tin oxide (ITO) glasses using dip-coating at room temperature. Post-heating has been performed by different temperatures i.e. 450 oC, 500 oC, 550 oC, and 600 oC under atmosphere ambient. The effect of post-heating temperature on the structural properties and absorbance of ZnO thin films have been investigated. Structurally, we observed ZnO thin films under a post-heating temperature of 450 oC, 500 oC, and 550 oC have polycrystalline hexagonal wurtzite structure. Meanwhile, at the temperature of 600 oC, it has an amorphous structure. Optical absorbance spectra of ZnO thin films confirmed that amorphous structure has the highest intensity compared to polycrystalline hexagonal wurtzite structure.

Keywords: ZnO thin films, post heating, structural, absorbance

Topic: Material Science