Influence of Ag doping on Optical Properties of Nanocrystalline Titanium Dioxide prepared by PLD

Abstract

In this work, Silver Ag doped nanocrystalline titanium dioxide TiO 2 films deposited with different concentration of (TiO2) 1-x (Ag) x of x= (0, 0.01, 0.02, 0.03, 0.04 and 0.05) Wt. on glass substrates were prepared by pulsed laser deposition (PLD) method, using pulsed Nd-YAG laser with wavelength (λ=1064 nm) and duration (9ns) and energy (700 mJ).The research has been including the study of optical properties through measuring the specters of absorbance and transmittance of the wavelength range (320-1100)nm. The results have been showed that the films have high transmittance for all films around 60-94% in the visible region and NIR of the spectrum that we can use them as optical windows in solar cells.The results of has been showed the absorption coefficient the direct transition are controlled, The values of the energy gap are calculated of the allowed direct electronic transitions are (3.81-3.63)eV. The energy gap is decreased gradually whenever the impurities rate increases.