Organic based flexible speaker through enhanced conductivity of PEDOT/PSS with various solvents

C. S. Lee, J. Y. Kim, D. E. Lee, Y. K. Koo, Jinsoo Joo, S. Han, Y. W. Beag, S. K. Koh

Research output: Contribution to journalArticle

38 Citations (Scopus)


Flexible organic film speaker (FOFS) was fabricated with ion assisted reaction (IAR) treated poly (vinylidene fluoidc) (PVDF) as active layer and poly (3,4-ethylenedioxythiophene)/poly (4-styrenesulfonate) (PEDOT/PSS), indium tin oxide (ITO) and Cu as electrodes. DC conductivity (σDC) of pristine PEDOT/PSS increases from 0.8 to ∼ 80 S/cm with adding various organic solvents [dimethyl sulfoxide (DMSO), N, N-dimethyl formamide (DMF), tetrahydrofuran (THF)]. The increase of σDC of PEDOT/PSS results from screening effect of organic solvents. Frequency response of sound pressure level (SPL) of film speaker is discussed in term of total current by applied electric field. The SPL of PVDF film speaker with highly conducting PEDOT/PSS (DMSO) electrode shows more flat SPL in the frequency range from 400 Hz to 10 kHz compare to Cu or ITO electrode.

Original languageEnglish
Pages (from-to)13-14
Number of pages2
JournalSynthetic Metals
Publication statusPublished - 2003 Apr 4



  • Ion assisted reaction
  • Piezoelectric polymer
  • PVDF
  • Sound pressure level

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

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