Influence of Heat Treatment on Structure and Charge Capacity of Sol-Gel Produced TiO2 Films

Özdemir O., Gökdemir F. P., Keskin B., Kutlu K.

in: International Congress on Energy Efficiency and Energy Related Materials ENEFM2013, Oral,A.Y.,Bahsi,Z.B.,Ozer,M., Editor, Springer, Zürich, pp.307-313, 2013

  • Publication Type: Book Chapter / Chapter Vocational Book
  • Publication Date: 2013
  • Publisher: Springer
  • City: Zürich
  • Page Numbers: pp.307-313
  • Editors: Oral,A.Y.,Bahsi,Z.B.,Ozer,M., Editor
  • Yıldız Technical University Affiliated: Yes

Abstract

Titanium dioxide thin films were synthesized by sol–gel route from titanium isopropoxide (TIP) with acetic acid. Prior to the heat treatment, the films were amorphous phase. Above 400 °C, phase transition took place from amorphous into anatase phase. Electrochromic properties of each phase indicated reversible coloration upon Li+ ion intercalation in cyclic voltammetric measurements. Nevertheless, both charge capacity and energy band gap of films begun to decrease with increase in annealing temperature due to the crystallization.

Keywords: Phase transition Decrease in band gap CV