NiO thin films doped with three different concentrations of Ag nanoparticles (AgNPs) are deposited on glass slide substrates at 450°C by sputtering method. The effect of AgNPs on the optical and structural characteristics of NiO thin film is studied by X-ray diffraction, scanning electron microscopy and ultraviolet-visible spectra. It is found that all the samples have a cubic structure. When Ag doping is made, the intensity of the diffraction peaks and the transmittance are decreased. On the other hand, the optical band gaps of NiO films doped with AgNPs are increased.

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Poly [2-methoxy-5-(2-ethylhexyloxy)-1, 4-phenylenevinyl] (MEH-PPV) thin films were created in this study using both spin coating and drop casting processes. MEH-PPV thin films generated by Ferric Chloride (FeCl3) doping (0.03, 0.06, 0.09, and 0.12 wt%) were studied for some physical features using Fourier-Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FE-SEM), and Energy Dispersive X-ray Spectroscopy (EDX). An FTIR test showed that there was no chemical reaction that occurred between Ferric Chloride (FeCl3) and MEH-PPV, but rather a physical one, that is, an organic material composite occurred. As for FE-SEM, the pure sample MEH-PPV formed uniformly, but when FeCl3 was added by weight, we have different circles that indicate the formation of adsorption energy and that the highest adsorption energy appears at MEH-PPV/FeCl3 (0.06%), as well as EDX, which indicates the absence of undesirable elements and indicates the presence of small peaks for iron (Fe) and chlorine (Cl). Peaks of carbon(C) and oxygen (O) types indicate the presence of the chemical elements of MEH-PPV.

NiO thin films doped with three distinct convergences of Au nanoparticles (AuNPs) are stored on the glass slide substrates at 440oC by thermal evaporation strategy. The impact of AuNPs on the optical properties of NiO thin film is examined by the ultraviolet-visible spectra (UV-Visible). At this point when Au doping is made, the transmittance is diminished. The expanding or diminishing of refractive index and the real part of the dielectric constant as forexpanding the doping fixations are relying upon the wavelength.

Fullerene thin films of about 200 nm thicknesses have been deposited by thermal evaporation method on soda lime glass at substrate temperature 303 and 403K under pressure about 10-5 mbar. This study concentrated on the influence of substrate temperature on the optical properties of C60 thin films within the visible range. Optical characterization has been carried out at room temperature using the absorption spectra, at normal incidence, in range (200-900) nm. The absorption and extinction coefficients of the samples have been evaluated according to the variation in the UV- Visible spectrum. Increasing substrate temperature causes decreasing in optical band gap energy, for direct allowed transitions, and slightly changing in refractive index. This incident was due to the reducing of interatomic intervals, which may be correlating a decrease in the amplitude of atomic vibrations around their equilibrium sites.