Journal
APPLIED PHYSICS LETTERS
Volume 88, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2199592
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Organic field-effect transistors (OFETs) for low-voltage operation have been realized with conventional polymer gate dielectrics such as polyimides and cross-linked poly-4-vinyl phenols (PVPs) by fabricating ultrathin films. These ultrathin polymers (thickness similar to 10 nm) have shown good insulating properties, including high breakdown fields (> 2.5 MV/cm). With ultrathin dielectrics, high capacitances (> 250 nF/cm(2)) have been achieved, allowing operation of OFETs within -3 V. Pentacene OFETs with ultrathin PVP dielectrics exhibit a mobility of 0.5 cm(2)/V s, an on-off ratio of 10(5), and a small subthreshold swing of 174 mV/decade when devices are operated at -3 V. (c) 2006 American Institute of Physics.
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