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ABSTRACT
Films for fluorescent solar concentrators applications were prepared by doping different organic dyes in PMMA. The products were characterized spectroscopically using FTIR. The optical energy gap and the band tail width were calculated. A simple but effective method is used to determine the optical constants (n and k) for the films from combination of transmission and specular reflection in a wide range of wavelengths (200–2400 nm). The results of these measurements show that the value of the refractive index increases with dye concentration in the PMMA. Also, three films of Rh-6G/PMMA, perylene/PMMA, and K1/PMMA were prepared with the same optical density and the optical constants of these films were determined.