Title :
Optical studies on sol-gel derived titanium dioxide films
Author :
Ray, A.K. ; Tracey, S.M. ; McQuillin, B. ; Hodgson, S.N.B.
Author_Institution :
Sch. of Eng., Sheffield Hallam Univ., UK
fDate :
11/1/2000 12:00:00 AM
Abstract :
Optical absorption A(λ) and transmission T(λ) spectra for normal incidence have been obtained within the wavelength (λ) range 300-900 nm for titanium dioxide (TiO2) films in anatase form prepared by the sol-gel method. The dispersion relation for refractive indices is in agreement with the oscillator model. The refractive index is found to be independent of thickness, Above the absorption tail, optical absorption is believed to be due to nondirect electronic processes involving no transitions between localised states in a single layer thick TiO2 film. For a multilayered film, transitions between localised states are probable as equal as those between all other states
Keywords :
light absorption; light transmission; localised states; optical films; refractive index; sol-gel processing; titanium compounds; 300 to 900 nm; TiO2; anatase form; dispersion relation; localised state transitions; multilayered film; nondirect electronic processes; normal incidence; optical absorption spectra; optical transmission spectra; oscillator model; refractive indices; single layer thick film; sol-gel derived TiO2 films;
Journal_Title :
Science, Measurement and Technology, IEE Proceedings -
DOI :
10.1049/ip-smt:20000698
