Optical properties of thermally evaporated PDI-8CN2 thin films

The optical properties of thermally evaporated PDI-8CN2 thin films have been investigated using Variable Angle Spectroscopic Ellipsometry (VASE). These layers were deposited on SiO2 dielectric layers as a means of measuring their properties on a standard interface. Regression analysis was used to determine the optical constants (refractive index and extinction coefficient) across a bandwidth of 300 – 900 nm. Anisotropy of the films was investigated, as well as the thickness dependence of the optical constants. This paper presents the results of these investigations.