Polymer-based printed electrolytic capacitor and its circuitry application in a low pass filtering, rectifying and energy storage unit

Chakra Rokaya, Jari Keskinen, Cat Bromels, Philipp Schäffner, Erkan Kuzeci, Donald Lupo

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

We report the fabrication of flexible, printed polymer electrolytic capacitors and their implementation in printed electronics applications such as filtering, rectification and energy harvesting and storage. Capacitors were fabricated by depositing conductive polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate onto porous anodized aluminum foil and yielded specific capacitance of 1 µF cm−2. This is far higher than values reported for printed plate capacitors and opens up the possibility of new applications in printed electronics related to filtering and smoothing at low frequencies. In this work, we have used printed polymer electrolytic capacitors to implement a resistor capacitor first order 1.03 kHz passive low pass filter, a full wave bridge rectifier circuit and a piezo-transducer energy harvester. An integrated full wave bridge rectifier based on these devices shows an efficiency of 80.5% at 1 kHz. When integrated with a vibration-motion based flexible piezoelectric transducer, the devices are able to generate and store about 1 mJ energy, which is a sufficient amount of energy for some low power electronics applications.
Original languageEnglish
Article number025005
Number of pages11
JournalFlexible and Printed Electronics
Volume6
Issue number2
DOIs
Publication statusPublished - 1 Jun 2021
Publication typeA1 Journal article-refereed

Keywords

  • PEDOT:PSS, Electrolytic capacitor, RC filter, Rectifier, Transducer, Harvester, Energy storage

Publication forum classification

  • Publication forum level 1

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