Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 18, Issue 21, Pages 3529-3536Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.200701251
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Funding
- Swedish Foundation for Strategic Research (SSF)
- VINNOVA
- Royal Swedish Academy of Sciences (KVA)
- Swedish Research Council, Knut och Alice Wallenbergs Stiftelse
- Linkoping University
- EU [NMP4-CT-2004-500355]
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Polyelectrolytes are promising materials as gate dielectrics in organic field-effect transistors (OFETs). Upon gate bias, their polarization induces an ionic charging current, which generates a large double layer capacitor (10-500 mu F cm(-2))at the semiconductor/electrolyte interface. The resulting transistor operates at low voltages (<1 V) and its conducting channel is formed in similar to 50 mu s. The effect of ionic currents on the performance of the OFETs is investigated by varying the relative humidity of the device ambience. Within defined humidity levels and potential values, the water electrolysis is negligible and the OFETs performances are optimum.
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