The Effect of Different Thickness on The Optical and Electrical Properties of TiO₂ Thin Films

Abstract

In the recent years TiO2 films are extensively studied because of their interesting chemical, optical and electrical properties. In the researcher work, TiO2 thin films have received great attention, because of having excellent photocatalytic and antibacterial properties when exposed to UV light (320 – 400 nm). TiO2 films spectra have maximum transmission at (900 nm) and exhibit high visible transmittance, up to 78 %, for 150 nm, which decreased slightly to 61.4 % for 450 nm. When wavelength decreases the absorptance will increase. The absorption coefficient is increasing with thickness decreasing (the probability of occurrence direct transition). From the light scattering effect for its high surface roughness the formation stage of anatase was appear with increase in grain size and density of layers. The refractive index increases with thickness increasing, and then the enhancement of growth crystalline. It have found a wide range of applications in various fields like photocatalysis, antibacterial and protective coatings, antireflecting coatings, etc.

A mathematical examination of the impact of mould transparency to infrared radiation on solidification during the investment casting process

“…The absorption coefficient can be calculated based on the measured reflectance and transmittance data using Equation 10 [8]. Knowledge of the sample thickness is needed for this calculation, which can readily be calculated based on the total sample thickness subtracting the Sapphire slide thickness.…”

Tailoring of ZnO thin films: effect of number of coating and sample ageing

“…in the range of wavelength from 450 nm to 1000 nm, absorbance is very low and nearly constant for all samples. When wavelength, λ>1000 nm, the energy of the incident photons is not sufficient to interact with atoms [44] and hence the influence of interference effect may be excluded. 7.…”