Optical Modeling Of Fluorine Doped Tin Oxide Films For Spectrally Selective Applications

Abstract

SnO2: F films are widely used for solar cell applications as the front electrode as well as other applications such as electrochromics and displays. Optical design of these and other applications need the knowledge of optical constants. In this study we used the dielectric constant of a combined Drude and Lorentz to model the optical behavior of SnO2: F. To do this, we used the fitting parameters from existing literature. From the model we got n and k values which we inserted into Fresnel R and T calculator and computed R and T spectra over the 300nm -2500nm wavelength range using Fresnel’s equations. We plotted n, k, T and R for different values of plasma frequency, p and damping parameter,G . The films exhibited very high visual transmittance and high infrared reflectance. The results implied the possibleness of the films to be employed as spectrally selective coating materials.