Flexible conducting polymer transistors with supercapacitor function. Issue 1 (30th September 2016)

• Record Type: Journal Article
• Authors: Yi, Zhihui; Bettini, Luca Giacomo; Tomasello, Gaia; Kumar, Prajwal; Piseri, Paolo; Valitova, Irina; Milani, Paolo; Soavi, Francesca; Cicoira, Fabio
• Is Part Of: Journal of polymer science. Volume 55:Issue 1(2017)
• Page Start: 96
• Page End: 103
• Publication Date: 2016-09-30
• Subjects: conducting polymers -- device fabrication -- organic electrochemical transistors -- PEDOT:PSS -- supercapacitors; 547
• DOI: 10.1002/polb.24244
• Languages: English
• ISSNs: 0887-6266

Abstract

ABSTRACT: Planar organic electrochemical transistors (OECTs) using PEDOT:PSS as the channel material and nanostructured carbon (nsC) as the gate electrode material and poly(sodium 4‐styrenesulfonate (PSSNa) gel as the electrolyte were fabricated on flexible polyethylene terephthalate (Mylar ® ) substrates. The nsC was deposited at room‐temperature by supersonic cluster beam deposition (SCBD). Interestingly, the OECT acts as a hybrid supercapacitor (to give a device that we indicate as transcap ). The energy storage ability of transcaps has been studied with two cell configurations: one featuring PEDOT:PSS as the positive electrode and nsC as the negative electrode and another configuration with reversed electrode polarity. Potentiostatic charge/discharge studies show that both supercapacitors show good performance in terms of voltage retention, in particular, when PEDOT:PSS is used as the positive electrode. Galvanostatic charge–discharge characteristics show typical symmetric triangular shape, indicating a nearly ideal capacitive behavior with a high columbic efficiency (close to 100%). © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys.2017, 55, 96–103 Abstract : In this work, flexible organic electrochemical transistors (OECTs) are fabricated using PEDOT:PSS as the channel material, nanostructured carbon, deposited at room temperature by a supersonic beam technique, as the gate electrode material, and poly(sodium 4‐styrenesulfonate) (PSSNa) gel as the electrolyte. Besides the OECT behaviour, the devices exhibit an interesting asymmetric supercapacitor function.