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Photocurrent probe of field-dependent mobility in organic thin-film transistors
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10.1063/1.2131183
/content/aip/journal/apl/87/20/10.1063/1.2131183
http://aip.metastore.ingenta.com/content/aip/journal/apl/87/20/10.1063/1.2131183
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Gate voltage dependence of the photocurrent yield spectra measured at different gate voltages. The two low-energy peaks at and have previously been identified (Refs. 9 and 10) as transitions to the Davydov-split singlet excitons (Ref. 9) while the ones at and are charge-transfer transitions between pentacene molecules (Ref. 10).

Image of FIG. 2.
FIG. 2.

Photocurrent voltage characteristics measured with incident wavelength tuned to the second singlet excitation . The lines are second order polynomial fits to the data as described in the text. (Inset) Gate voltage dependence of the hole mobility determined using Eq. (2).

Image of FIG. 3.
FIG. 3.

Direct current voltage curves for various gate voltages. The lines are third order polynomial fits to the data as described in the text.

Image of FIG. 4.
FIG. 4.

Gate voltage dependence of the hole mobility (open squares, left axis) extracted from the photocurrent measurements, and the free carrier density (solid circles, right axis) determined by fitting the direct measurements using the average experimental mobility. (Inset) The average mobility as a function of free hole density.

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/content/aip/journal/apl/87/20/10.1063/1.2131183
2005-11-07
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Photocurrent probe of field-dependent mobility in organic thin-film transistors
http://aip.metastore.ingenta.com/content/aip/journal/apl/87/20/10.1063/1.2131183
10.1063/1.2131183
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