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The effect of nanosize metal overlayer, both evaporated on C60 films (Bi, In) and attached as nanoparticles of (Ag, Au), on the optical parameters of C60 films near the fundamental absorption edge has been studied. The values of direct band gap (Eg), the optical gap (Eo) in the framework of Tauc model and the Urbach tail parameter (EU) were determined from the absorption coefficient (α) spectra plotted in coordinates (αhν) 2 , (αhν) 1/2 , ln(α) vs hν, respectively. Parameters obtained testify diminishing the structural disorder in C60 thin films with nanosize metal overlayer at optimal ratio of C60 to metal layer thicknesses.

Effect of nanosize metal overlayer on C60 thin film optical parameters near fundamental absorption edge