Effect of Irradiating Energy on Optical Energy Band Gap of Copper Phthalocyanine Solutions

Abstract

Copper phthalocyanine solution ( CuPc ) was prepared from copper phthalocyanine powder dissolved in chloroform at a concentration of (0.15 g/L) and irradiated with beta nuclear rays for beta plus(Na-22) and minus beta (Sr-90) for a period of) 1 , 2 ,3)days .The optical spectra were measured before and after irradiation, for CuPC solutions .it appeared that the absorbance and reflectance were decrease with irradiating time increasing ,while the transmittance and optical energy band gap increased . Also, the optical constants such as absorption coefficient, refractive index, extinction coefficient and dielectric constant have been calculated and it was found that they were slightly depending on irradiating time.