Investigation of optical properties of a novel pyrene-aminoisophthalate thin film grown by the spin coating method

Abstract

Pyrene-aminoisophthalate (containing an pyrene-imine group) thin film was deposited on quartz glass substrate with spin coating method. UV absorption measurements of the fabricated organic film were evaluated as a function of energy. Transmittance ( T) was decreased depending on the increasing energy in the energy range from 1.5 eV to 2.5 eV whereas the reflectance (R ) increased and then  remains almost constant as  decreases.  At 1.55 eV, the , , and absorbance (A ) values were determined as 77.77, 6.78, and 0.11, respectively. The indirect and direct optical band gap ( ) were calculated to be 1.84 eV and 2.51 eV, respectively. The results note that the organic compound is in the semiconductor class and promising material for optoelectronic and electronic devices.