Formation Of TiO2 Thin Films By A Modified Sol-gel Route And Characterization Of Structural, Optical And Electrochromic Properties
Fatma Pinar Gokdemir, vecihe Ece Yuzbasioglu, Bahadir Keskin, Orhan Ozdemir, Kubilay Kutlu
Volume 5, Issue 7, Page 367-371, Year 2014 | DOI: 10.5185/amlett.2014.amwc.1007
Titanium dioxide; chelation effect; phase transformation; cathodic electrochromism.
Through a modified sol gel route with titanium isopropoxide (TIP) and acetic acid, titanium dioxide (TiO2) thin films were deposited by dip coating. Employing acetic acid as modifier and without inclusion of water in hydrolysis leaded to control the degree of condensation-oligorimerization of the precursor and formation of anatase phase only upon annealing. Direct allowed energy band gap 3.87 eV verified the anatase phase of the film. Impact of temperature on structural properties was deduced by FTIR and UV-Visible spectroscopies. Due to the reduction in band gap with increase in annealing temperature, injected Li+ charge amount dropped in anatase compared to the amorphous (unannealed) films. Copyright © 2014 VBRI press.