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Electrical conductivity and optical properties of poly(3‐thiophene boronic acid) organic semiconductor
Author(s) -
Yakuphanoglu Fahrettin,
Şenkal B. Filiz
Publication year - 2009
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21333
Subject(s) - thiophene , materials science , dielectric , boronic acid , semiconductor , band gap , dispersion (optics) , refractive index , organic semiconductor , absorption (acoustics) , polymer , electrical resistivity and conductivity , optical conductivity , analytical chemistry (journal) , optoelectronics , chemistry , organic chemistry , optics , composite material , electrical engineering , physics , engineering
Abstract Electrical conductivity and optical properties of the poly(3‐thiophene boronic acid) have been investigated. The room temperature electrical conductivity and activation energy of the poly(3‐thiophene boronic acid) were 2.0 × 10 −9 S/cm and 0.17 eV, respectively. In the semiconductor region of the polymer, the charge transport mechanism is taking place by the hopping process in the localized states. The direct optical band gap value of the poly(3‐thiophene boronic acid) was found to be 1.92 eV via optical absorption method. The width of localized states for the polymer was determined to be 0.36 eV. The refractive index dispersion curve of the polymer obeys the single oscillator model. The refractive index dispersion parameter E o / S o for the poly(3‐thiophene boronic acid) was determined to be 9.82 × 10 12 eV m 2 . The optical dielectric constants of the polymer were determined. The real part of the dielectric constant of the polymer is higher than that of imaginary part of the dielectric constant. The imaginary part shows a peak corresponding to the absorption edge. It is evaluated that the electrical and optical results of the poly(3‐thiophene boronic acid) indicate that it is an organic semiconductor with electrical and optical parameters. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers