Optical properties of dip coated titanium-di-oxide (TiO2) thin films annealed at different temperatures. (21st February 2018)

• Record Type: Journal Article
• Authors: Biswas, Sayari; Kar, Asit Kumar
• Is Part Of: Materials research express. Volume 5:Number 2(2018)
• Publication Date: 2018-02-21
• Subjects: TiO2 thin film -- autoclaved sol -- hydrothermal method -- dip coating; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aaad8c
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: Titanium dioxide (TiO2 ) thin films were synthesized by hydrothermal assisted sol-gel dip coating method on quartz substrate. The sol was prepared by hydrothermal method at 90 °C. Dip coating method was used to deposit the thin films. Later films were annealed at four different temperatures −600 °C, 800 °C, 1000 °C and 1200 °C. XRD study showed samples annealed at 600 °C are almost amorphous. At 800 °C, film turns into anatase phase and with further increment of annealing temperature they turn into rutile phase. Transmission spectra of thin films show sharp rise in the violet-ultraviolet transition region and a maximum transmittance of ∼60% was observed in the visible region for the sample annealed at the lowest temperature. Band gap of the prepared films varies from 2.9 eV to 3.5 eV.