Optical Properties of Semiconductors Polymers and Polymer Blends

Optical Properties of Semiconductors (Polymers and Polymer Blends) 

One of the spedfic objectives of studying UV/VIS optical absorption spectra is to obtain data regarding the physical properties of materials. The spectra obtained include the relationship between the light (transmitted, reflected, or refracted) intensity as a function of photon energy E or wavelength 1. The information obtained is important for basic science and its applications, and indudes many valuable constants that can be calculated to present the optical properties of the medium under investigation. This spedrum can also be evaluated to charaderize the polymer blends. 

The optical constants (refradive index n and extinction coefficient k) of any medium can be illustrated by the complex index of refraction, N = n — ik, or the complex dielectric function, = i — i 2, where e is related to N by the relation = N, so that i = and 2 = Ink. Such nondestmctive measurements as 

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