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Hysteresis-free organic field-effect transistors and inverters using photocrosslinkable poly(vinyl cinnamate) as a gate dielectric
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FIG. 1.

(a) The chemical structures of PVCN (left) and photochemically crosslinked PVCN (right). The (b) UV-vis and (c) FTIR absorption spectra of a spin-coated PVCN film before and after UV exposure. In (c), alip., conj., and unconj. are abbreviations of aliphatic, conjugated, and unconjugated, respectively.

Image of FIG. 2.

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FIG. 2.

Height-mode AFM topographs of (a) the crosslinked PVCN dielectric and (b) the thick pentacene film on the dielectric.

Image of FIG. 3.

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FIG. 3.

(a) The current density-electric field characteristics of spin-coated PVCN film before and after UV exposure. The thicknesses of the pristine and crosslinked films were found to be 507 and , respectively. The inset shows a schematic diagram of the metal-insulator-metal structure that produces the characteristics. (b) The transfer characteristics of the OFET with a PVCN dielectric and (c) its output characteristics.

Image of FIG. 4.

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FIG. 4.

The VTCs of the inverter consisting of OFETs with crosslinked PVCN dielectrics . The left side inset shows the inverter gains for a voltage sweep from . The right side inset shows the schematic diagram of the inverter based on zero drive load logic: the upper OFET is a load transistor and the bottom OFET is a drive transistor.

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/content/aip/journal/apl/92/14/10.1063/1.2907974
2008-04-09
2014-04-21

Abstract

We have fabricated organic field-effect transistors(OFETs) and inverters using photocrosslinkable poly(vinyl cinnamate) (PVCN) as a gate dielectric. The photocrosslinked PVCN dielectric film has superior insulating properties and does not require thermal curing. The high water resistance of the dielectric, which arises because PVCN is hydroxyl group-free, means that the devices were found to be hysteresis-free in all operations. The OFETs with the PVCN dielectric were found to exhibit a carrier mobility of , an on/off ratio of , and a subthreshold swing of /decade. An organic inverter consisting of two OFETs exhibited a high inverter gain of 17.9.

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Scitation: Hysteresis-free organic field-effect transistors and inverters using photocrosslinkable poly(vinyl cinnamate) as a gate dielectric
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/14/10.1063/1.2907974
10.1063/1.2907974
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