An approach to durable poly(vinylidene fluoride) thin film loudspeaker

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

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

The piezoelectric poly(vinylidene fluoride) (PVDF) surface possessing low surface energy was modified by the ion-assisted-reaction (IAR) method for the application of thin film speaker. The IAR-treated hydrophilic PVDF surface was investigated using atomic force microscopy and x-ray photoelectron spectroscopy. The adhesion strength between various types of electrodes and the film was dramatically improved due to the hydrophilic functional groups, such as -C-O-, -(C=O)-, -(C=O)-O-, and so forth. A durable loudspeaker film was fabricated by enhancing the adhesion between the screen-printed poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS) and the modified PVDF films. The PVDF speaker film with the PEDOT/PSS electrode showed higher durability, flatter sound pressure level characteristics, and easier processability compared to metals or indium tin oxide electrodes.

Original languageEnglish
Pages (from-to)2904-2911
Number of pages8
JournalJournal of Materials Research
Volume18
Issue number12
DOIs
Publication statusPublished - 2003 Dec

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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