Abd-Elghany, R., Khoder, H., Khalil, R., El-Mansy, M. (2021). Study on nonlinear conduction of PEDOT:PSS conducting polymer. Benha Journal of Applied Sciences, 6(2), 47-56. doi: 10.21608/bjas.2021.167860
R. S. Abd-Elghany; H. Khoder; R. Khalil; M. K. El-Mansy. "Study on nonlinear conduction of PEDOT:PSS conducting polymer". Benha Journal of Applied Sciences, 6, 2, 2021, 47-56. doi: 10.21608/bjas.2021.167860
Abd-Elghany, R., Khoder, H., Khalil, R., El-Mansy, M. (2021). 'Study on nonlinear conduction of PEDOT:PSS conducting polymer', Benha Journal of Applied Sciences, 6(2), pp. 47-56. doi: 10.21608/bjas.2021.167860
Abd-Elghany, R., Khoder, H., Khalil, R., El-Mansy, M. Study on nonlinear conduction of PEDOT:PSS conducting polymer. Benha Journal of Applied Sciences, 2021; 6(2): 47-56. doi: 10.21608/bjas.2021.167860
Study on nonlinear conduction of PEDOT:PSS conducting polymer
Physics Dept., Faculty of Science, Benha Univ., Benha, Egypt
Abstract
In the present study, solid film of poly (3,4-ethylenedioxythiophene):polystyrenesulfonate, (PEDOT:PSS) has been prepared by casting its aqueous solution at room temperature and are characterized by using X-ray diffraction and differential scanning calorimeter. The temperature-dependent behavior of the ac and dc conductivity of the PEDOT:PSS film has been investigated. The temperature dependence and scan rate dependence of J-V characteristic curves have been tested. The study of frequency dependence of ac conductivity in a wide range of temperature up to 443 K, indicates that the dominant conduction mechanism in PEDOT:PSS film is Overlapping-Large Polaron Tunneling (OLPT). The study of the electrical conduction with applied voltage shows a reversible negative differential resistance (NDR) through the turnover point (T.O.P) for Cu/PEDOT:PSS/Cu device. Threshold current density, Jth, and threshold voltage, Vth at T.O.P as well as NDR are strongly affected by ambient temperature up to 383K and scan rate up to 3V/sec. The turnover behavior has been explained according to a competition between high conduction due to schottky emission and NDR due to field-induced of electrical polarization in conduction paths.