@inproceedings{23871,
  keywords = {Optical properties, Sol-gel deposition, Cerium oxide-titanium oxide, Counter electrode, Electrochemical properties, Electrochromic device},
  author = {Nilgün Özer and Selmar DeSouza and Carl M Lampert},
  title = {Optical and Electrochemical Properties of Sol-gel Spin Coated CeO<sub>2</sub>-TiO<sub>2</sub> Films},
  abstract = {<p>The optical and electrochemical properties of sol-gel spin coated Ce0<sub>2</sub>-TiO<sub>2</sub> (50% CeO<sub>2</sub>) films were investigated for electrochrornic applications. The coating solutions were prepared by using mixed organic-inorganic | Ti(OC<sub>2</sub>H<sub>5</sub>)<sub>4</sub> and Ce(NH<sub>4</sub>)<sub>2</sub> (NO<sub>3</sub>)<sub>6</sub> | precursors. X-ray diffraction studies showed the sol-gel spin-coated films were composed of an amorphous matrix of titanium oxide containing nanocrystallites of cerium oxide. The coating solar transmission value was T<sub>s</sub>=0.8 (250 nm thick). The refractive index and the extinction coefficient were derived from transmittance measurements in the UV-VIS-NIR regions. These films had refractive index value of n=2.18 and extinction coefficient value of k=8x10<sup>-4</sup> at λ=550 nm. Cyclic voltametric measurements showed reversible electrochemical insertion of lithium ions in a CeO<sub>2</sub>-TiO<sub>2</sub>/LiClO<sub>4</sub>-propylene carbonate electrochemical cell. During cycling the films maintain high optical transmittance. Spectrophotometric and electrochemical investigations performed on CeO<sub>2</sub>-TiO<sub>2</sub> films revealed that these films are suitable as an optically passive counter-electrode in lithium electrochromic devices.</p>},
  year = {1995},
  journal = {SPIE Meeting},
  month = {07/1995},
  address = {San Diego, CA},
  language = {eng},
}