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Hall-effect mobility of pentacene films prepared by the thermal evaporating method with different substrate temperature
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Figures

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FIG. 1.

The room-temperature mobility as a function of substrate temperature.

Image of FIG. 2.

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FIG. 2.

The Hall-effect mobility as a function of measurement temperature [pentacene films prepared with substrate temperature of (a) 30 °C, (b) 50 °C, (c) 70 °C, (d) 90 °C and (e) 110 °C].

Image of FIG. 3.

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FIG. 3.

The Hall voltage-time curve of pentacene films prepared with substrate temperature of 90 °C at B = 0.55 T.

Tables

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Table I.

Fitting parameters and results for pentacene films prepared with different substrate temperature.

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/content/aip/journal/apl/101/1/10.1063/1.4733293
2012-07-03
2014-04-23

Abstract

We studied the Hall-effect mobility of pentacene films prepared by the thermal evaporating method with different substrate temperature. A crossover from coherent bandlike charge transport with mobilities up to several tens of cm2/V-s at low temperature to an incoherent hopping motion at high temperature is observed. The carrier mobilities of pentacene exhibit a hopping-to-band transition around room temperature. An exhibition of high mobility of pentacene films prepared with substrate temperature of 90 °C is attributed to the increased spacing between molecules.

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Scitation: Hall-effect mobility of pentacene films prepared by the thermal evaporating method with different substrate temperature
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/1/10.1063/1.4733293
10.1063/1.4733293
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