A Current Supply with Single Organic Thin-Film Transistor for Charging Supercapacitors. (18th August 2016)

• Record Type: Journal Article
• Authors: Keshmiri, Vahid; Larsen, Christian; Edman, Ludvig; Forchheimer, Robert; Tu, Deyu
• Is Part Of: ECS transactions. Volume 75:Number 10(2016)
• Page Start: 217
• Page End: 222
• Publication Date: 2016-08-18
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/07510.0217ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : We present a current supply, comprising a single organic thin-film transistor (OTFT), for the charging of supercapacitors. The current supply takes power from the electric grid (115 V AC, US standard), converts the AC voltage to a quasi-constant DC current (~0.1 mA) regardless of the impedance of the load, and charges the supercapacitor. Solution-processed OTFTs based on the popular polymeric semiconductor poly(3-hexylthiophene-2, 5-diyl) have been developed to rectify the 115 V AC voltage. A diode-configured OTFT was used as a half-wave rectifier. The single OTFT current supply was demonstrated to charge a 220 mF supercapacitor to 1 V directly using 115 V AC voltage as the input. This work paves the road towards all-printable supercapacitor energy-storage systems with integrated chargers, which enable direct charging from a power outlet.