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Updated: Aug 19, 2025
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A Simple and Scalable Fabrication Method for Organic Electronic Devices on Textiles
Published on: March 13, 2017
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Ultrathin, all-organic, fabric-based ferroelectret loudspeaker for wearable electronics
Moritz Ploner1, Ningzhen Wang1, Chao Wu1
1Electrical Insulation Research Center, Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA.
Iscience
|December 1, 2022
Summary
Researchers developed all-organic, body-compatible loudspeakers using ferroelectrets and novel electrodes. The best performing loudspeakers integrated expanded polytetrafluoroethylene (ePTFE) ferroelectrets with fabric electrodes for wearable electronics.
Area of Science:
- Materials Science
- Electronics Engineering
- Acoustics
Background:
- Wearable electronics demand flexible, body-compatible audio devices.
- Ferroelectrets show promise for loudspeakers due to their piezoelectric properties.
Purpose of the Study:
- To investigate the performance of all-organic ferroelectret loudspeakers.
- To evaluate the impact of different ferroelectret films and electrode materials on sound characteristics.
Main Methods:
- Fabrication of loudspeakers using cellular polypropylene and expanded polytetrafluoroethylene (ePTFE) ferroelectrets.
- Integration with three electrode types: PEDOT:PSS-coated fabrics, direct PEDOT:PSS coating, and Au/Pd sputtering.
- Analysis of frequency-dependent sound intensity and radiation directivity.
Main Results:
- All-fabric loudspeakers with ePTFE ferroelectrets and PEDOT:PSS-coated spandex electrodes exhibited higher frequency dependency.
- Loudspeakers with PEDOT:PSS-coated spandex electrodes showed reduced angle dependency.
- An all-organic FEP-ePTFE-based ferroelectret loudspeaker with PEDOT:PSS-coated fabrics demonstrated high thermal stability and ease of integration.
Conclusions:
- The developed all-organic loudspeakers are suitable for wearable applications.
- ePTFE ferroelectrets combined with PEDOT:PSS-coated fabric electrodes offer competitive performance.
- These loudspeakers are body-compatible, thermally stable, and easily integrated into clothing.
