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Pentacene thin film transistors with a poly(methyl methacrylate) gate dielectric: Optimization of device performance
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10.1063/1.3075616
/content/aip/journal/jap/105/3/10.1063/1.3075616
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/3/10.1063/1.3075616

Figures

Image of FIG. 1.
FIG. 1.

A schematic cross section of the pentacene-based OTFT with a PMMA gate dielectric.

Image of FIG. 2.
FIG. 2.

Thickness of spin-coated PMMA films as function of spinning speed and solution concentration.

Image of FIG. 3.
FIG. 3.

Atomic force microscope images of (a) 150 nm thick PMMA film spin coated onto a glass slide and (b) 30 nm thick pentacene film thermally evaporated on top of the PMMA.

Image of FIG. 4.
FIG. 4.

Current density vs applied electric field for an Al/PMMA/Au structure. The PMMA film .

Image of FIG. 5.
FIG. 5.

Schottky [ vs ] and Poole–Frenkel [ vs ] plots for an Al/PMMA/Au structure. The PMMA film .

Image of FIG. 6.
FIG. 6.

Capacitance vs frequency characteristics of a spin-coated PMMA layer; .

Image of FIG. 7.
FIG. 7.

Capacitance vs voltage characteristics, measured at 1 MHz and voltage scan rate of for Al/PMMA/pentacene/Au structure for two different thicknesses of PMMA. Pentacene .

Image of FIG. 8.
FIG. 8.

(a) Output and (b) transfer characteristics with different thicknesses of PMMA. Inset: field-effect mobility as a function of the thickness of PMMA.

Image of FIG. 9.
FIG. 9.

Possible leakage paths in (a) unpatterned pentacene OTFT and (b) patterned pentacene devices.

Image of FIG. 10.
FIG. 10.

Optical micrograph of a patterned pentacene-based OTFT with PMMA gate dielectric (channel ; channel ).

Image of FIG. 11.
FIG. 11.

(a) offset and (b) leakage currents in patterned and unpatterned pentacene OTFTs.

Image of FIG. 12.
FIG. 12.

vs channel width:length ratio for pentacene OTFTs. The output characteristics are shown in the inset. . PMMA .

Image of FIG. 13.
FIG. 13.

Output characteristics for OTFTs with the same channel width:length ratio but different channel lengths and widths. PMMA .

Image of FIG. 14.
FIG. 14.

(a) Output and (b) transfer characteristics of a pentacene-based OTFT using PMMA as the gate dielectric. Channel ; channel .

Tables

Generic image for table
Table I.

Summary of pentacene/PMMA OTFT characteristics.

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/content/aip/journal/jap/105/3/10.1063/1.3075616
2009-02-10
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Pentacene thin film transistors with a poly(methyl methacrylate) gate dielectric: Optimization of device performance
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/3/10.1063/1.3075616
10.1063/1.3075616
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