Pages: 135-141
Date of Publication: 30-Nov--0001
OPTICAL PROPERTIES OF AL-DOPED TIO2 THIN FILMS
Author: M. Vishwas
Category: Engineering, Science and Mathematics
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Abstract:
Un-doped titanium dioxide (TiO2) and aluminium (Al) doped thin films were prepared by the sol-gel method. TiO2 sol is mixed with different weight % of aluminium and films were prepared by spin coating. The films were characterised with optical transmittance/reflectance measurements using spectrophotometer. The optical constants (n, k) were determined by envelope method. Optical band gap energy was estimated using Tauc’s method and found to be 3.36 and 3.28 eV respectively at 50oC and 150oC respectively.
Keywords: TiO2; Sol-Gel; Optical properties; n & k; Thin films.
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