INTERNATIONAL JOURNAL OF ENGINEERING, SCIENCE AND - Volume 6, Issue 5, September 2017

Pages: 135-141
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OPTICAL PROPERTIES OF AL-DOPED TIO2 THIN FILMS

Author: M. Vishwas

Category: Engineering, Science and Mathematics

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.