Fabrication and characterization of all-polymer, transparent ferroelectric capacitors on flexible substrates

• Published in: Organic electronics Vol. 12; no. 12; pp. 2225 - 2229
• Main Authors: Khan, M.A., Bhansali, Unnat S., Alshareef, H.N.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-12-2011; Elsevier
• Subjects: Acoustic wave devices, piezoelectric and piezoresistive devices; Applied sciences; Dielectric, amorphous and glass solid devices; Electronics; Exact sciences and technology; Fatigue; Ferroelectric capacitor; Flexible electronics; Leakage current; P(VDF-TrFE); Polymer electrodes; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Fatigue; Leakage current; Polymer electrodes; Flexible electronics; Ferroelectric capacitor; P(VDF-TrFE); Performance evaluation; Ferroelectric device; Polymer blends; Polymer; Switching; Thiophene derivative polymer; Vinylidene fluoride copolymer; Platinum; Flexible structure; Morphology; Styrenesulfonic acid polymer; Coercive force; Styrenesulfonate polymer; Ferroelectric capacitors; Trifluoroethylene copolymer
• ISSN: 1566-1199; 1878-5530
• DOI: 10.1016/j.orgel.2011.08.032

[Display omitted]
► All-polymer, flexible and transparent ferroelectric capacitors are demonstrated. ► Improved fatigue performance with polymer electrodes is shown. ► Lower coercive voltage is reported compared to other polymer electrodes. ► Orientation of P(VDF-TrFE) film on metal and polymer electrodes studied using FT-IR. ► Leakage current with polymer electrodes is found to be Schottky controlled.
All-polymer, transparent ferroelectric devices, based on the functional polymer poly(vinylidene fluoride trifluoroethylene) [P(VDF-TrFE)], have been fabricated on flexible substrates. The performance of the all-polymer devices was studied and compared to devices with metal electrodes. Specifically, poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid) [PEDOT:PSS] and platinum (Pt) electrode effects on the morphology, crystallinity and orientation of P(VDF-TrFE) films were investigated. The devices with PEDOT:PSS electrodes showed similar hysteresis and switching current response compared to Pt electrodes but with tremendously improved fatigue performance. Further, the devices with PEDOT:PSS electrodes showed lower coercive field and better fatigue performance than values reported for other polymer electrodes used with P(VDF-TrFE) on flexible substrates.