Journal
JOURNAL OF MATERIALS RESEARCH
Volume 18, Issue 12, Pages 2904-2911Publisher
MATERIALS RESEARCH SOCIETY
DOI: 10.1557/JMR.2003.0405
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The piezoelectric poly(vinylidene fluoride) (PVDF) surface possessing low surface energy was modified by the ion-as sisted-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.
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