Enhanced ferroelectricity and conductance in iron-doped polystyrene sulfonate

Author(s)

Curcino da Silva, Silesia de Fatima ^[1] ; Rabelo, Adriano Cesar ^[1] ; da Silva, Leonardo Morais ^[2] ; Guerra, J. D. S. ^[1] ; Tozoni, Jose Roberto ^[1] ; Silva, R. A. ^{[1, 3]} ; Oliveira, Jr., Osvaldo N. ^[4] ; Marletta, Alexandre ^[1]

Affiliation

^[1] Univ Fed Uberlandia, Inst Fis, BR-38408100 Uberlandia, MG - Brazil

^[2] Univ Fed Vales Jequitinhonha & Mucuri, BR-39100000 Diamantina, MG - Brazil

^[3] Univ Fed Minas Gerais, ICEx, Dept Fis, Ave Antonio Carlos 6627, Belo Horizonte, MG - Brazil

^[4] Univ Sao Paulo, Inst Fis Sao Carlos, CP 369, BR-13560970 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Journal of Non-Crystalline Solids; v. 503, p. 103-109, JAN 15 2019.
• Web of Science Citations: 0

Abstract

We report on the synthesis of poly(styrene sulphonate) (PSS) doped with iron ions (PSS:Fe) and its electrical properties in J-Field Effect Transistors (J-FET). PSS:Fe films exhibited enhanced ferroelectric and conductance in comparison with non-doped PSS films, with a conductivity of 4.47 10(-6) S/m. In comparison with traditional ferroelectric polymers, such as poly(vinylidene fluoride-trifluoroethylene) {[}P(VDF-TrFE)], PSS:Fe films had coercive fields three orders of magnitude smaller and remnant polarization six orders of magnitude higher. When operated with a negative gate voltage (V-G), the drain current (I-D) increased significantly, while positive gate voltages reduced the conductor channel and decreased I-D. The proposed in-plane geometry with PSS:Fe monolayer films exhibits suitable ferroeletricity characteristics. (AU)

• FAPESP's process: 13/14262-7 - Nanostructured films from biologically-relevant materials
• Grantee: Osvaldo Novais de Oliveira Junior
• Support Opportunities: Research Projects - Thematic Grants