Open AccessStudy of Optical properties of Polymer PVP thin films grafted by Fluorescence dyes
Author(s) -
Ali S. Ali
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1879/3/032111
Subject(s) - band gap , materials science , absorption (acoustics) , attenuation coefficient , dielectric , fluorescence , polymer , thin film , phonon , photon energy , analytical chemistry (journal) , casting , optoelectronics , optics , nanotechnology , photon , chemistry , condensed matter physics , composite material , organic chemistry , physics
A polymer of polyvinyl pyrrolidone (PVP) with fluorescence dye (Flu) was prepared as thin films by casting method with a ratio of (10%) from added the dye. In this case, the optical properties at a wave number range of (200-900) nm were studied. The Absorption (A), transmission (T) spectra, absorption coefficient (α), direct and indirect transitions for energy gap are represented for optical properties. We have found that the polymeric films of PVP/Flu have indirect transition with phonon energy. The indirect energy gap and phonon energy equal to (1.74) eV and (0.15) eV respectively, and the maximum value for (R, K) at the photon energy is (2.3eV). Also, we see that the real ( ε 1 ) and imaginary ( ε 2 ) parts of the dielectric constant increases with increasing the photon energy.