Study on nonlinear conduction of PEDOT:PSS conducting polymer | ||||
| Benha Journal of Applied Sciences | ||||
| Article 8, Volume 6, Issue 2, March and April 2021, Page 47-56 PDF (804.87 K) | ||||
| Document Type: Original Research Papers | ||||
| DOI: 10.21608/bjas.2021.167860 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| R. S. Abd-Elghany; H. Khoder; R. Khalil; M. K. El-Mansy | ||||
| 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. | ||||
| Keywords | ||||
| PEDOT:PSS; Impedance spectroscopy; Negative differential resistance; Switching memory; Scan rate | ||||
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