Flexible and transparent organic film speaker by using highly conducting PEDOT/PSS as electrode

C. S. Lee, J. Y. Kim, D. E. Lee, J. Joo, B. G. Wagh, S. Han, Y. W. Beag, S. K. Koh

Research output: Contribution to journalArticlepeer-review

63 Citations (Scopus)


Flexible organic film speaker (FOFS) was fabricated with ion-assisted-reaction (IAR) treated poly(vinylidene fluoide) (PVDF) as active layer and poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS), indium tin oxide (ITO), or copper (Cu) as electrode. The PEDOT/PSS materials were screen printed on the PVDF surface. The dc conductivity (σdc) of pristine PEDOT/PSS increases from 0.8 to ∼80S/cm by adding various organic solvents. The sound pressure level (SPL) of PVDF-based FOFS with a highly conducting PEDOT/PSS (dimethyl sulfoxide, DMSO) electrode is 27d B higher than that with a low conducting PEDOT/PSS (H2O) at 1 kHz. The highly conducting PEDOT/PSS (DMSO) as electrode is more suitable to PVDF-based FOFS compared to Cu or ITO because of the stable and more flat SPL, the flexibility, easy patterning, and coating process.

Original languageEnglish
Pages (from-to)457-461
Number of pages5
JournalSynthetic Metals
Issue number2
Publication statusPublished - 2003 Sept 5

Bibliographical note

Funding Information:
This work was supported in part by P&I Corporation, the CRM-KOSEF, the project of Industrial Use of Ion Beam (KISTEP), and the Brain Korea 21.

Copyright 2008 Elsevier B.V., All rights reserved.


  • PVDF
  • Sound pressure level

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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