J. Phys. IV France
Volume 125, June 2005
Page(s) 415 - 417

J. Phys. IV France 125 (2005) 415-417

DOI: 10.1051/jp4:2005125097

Optical properties of rhodamine 6G-doped TiO2 sol-gel films

S.A. Tomás1, S. Stolik1, R. Palomino2, R. Lozada2, C. Persson3, R. Ahuja4, I. Pepe5 and A. Ferreira da Silva5

1  Departamento de Física, CINVESTAV-IPN, AP 14-740, Mexico 07300, DF, Mexico
2  Facultad de Ciencias Físico-Matemáticas, BUAP, AP 1152, Puebla, Mexico
3  Royal Institute of Technology, 100 44 Stockholm, Sweden
4  Department of Physics, Uppsala University, 751 21 Uppsala, Sweden
5  Instituto de Fisica, Universidade Federal da Bahia, Ondina 40 210 340 Salvador, Ba, Brazil

The optical properties of titania (TiO2) thin films prepared by the sol-gel process and doped with rhodamine 6G were studied by Photoacoustic Spectroscopy. Rhodamine 6G-doping was achieved by adding 0.01%, 0.02%, 0.05% y 0.1% mol rhodamine to a solution that contained titanium isopropoxide as precursor. Two absorption regions were distinguished in the absorption spectrum of a typical rhodamine 6G-doped TiO2 film. A shift of these bands occured as a function of rhodamine 6G-doping concentration. In addition, the optical absorption and band gap energy for rutile-phase TiO2 films were calculated employing the full-potential linearized augmented plane wave method. A comparison of these calculations with experimental data of TiO2 films prepared by sol-gel at room temperature was performed.

© EDP Sciences 2005