Surface Morphology Properties of the 5,5 '-Di(4-biphenylyl)-2,2 '-bithiophene (PPTTPP) Nanofiber Film and Calculations of the Optical Parameters of the PPTTPP Nanofiber Optoelectronic Devices

Abstract

The surface morphology properties of 5,5'-Di(4-biphenylyl)-2,2'-bithiophene (PPTTPP) nanofiber film were investigated. The roughness average (Ra), root mean square roughness (Rq), ratio of Rq/Ra, surface skewness (Rsk) and surface kurtosis (Rku) parameters of the PPTTPP film were found to be 35.717 nm, 44.871 nm, 1.256, 0.274 and 2.474, respectively. Then, the optical properties of the solutions of the PPTTPP nanofiber for chloroform, DMF and toluene solvent were investigated. The effects of the different solvents on the optical parameters such as molar extinction coefficient, mass extinction coefficient, average transmittance, optical band gap, real and imaginary part of the dielectric constant, electrical susceptibility, real and imaginary part of conductivity were investigated. The maximum mass extinction coefficient (alpha(max)) values at epsilon(max) values (3.303 x 10(3), 3.442 x 10(3) and 3.732 x 10(3) Lmol(-1) cm(-1), respectively) of the solutions of the PPTTPP nanofiber for chloroform, DMF and toluene were found to be 7.018, 7.313 and 7.930 L g(-1) cm(-1), respectively. The optical band gap (E-g) values of the solutions of the PPTTPP nanofiber for chloroform, DMF and toluene were found to be 2.065, 2.161 and 1.989 eV, respectively. The solution technique used in this study to investigate the optical properties of the soluble materials is cheaper and more accurate than a film technique.