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Enhancement of the hole injection into regioregular poly(3-hexylthiophene) by molecular doping
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/content/aip/journal/apl/97/8/10.1063/1.3464560
2010-08-24
2014-07-23

Abstract

The hole injection in Schottky barriers formed between -type doped regioregular poly(3-hexylthiophene-2,5-diyl) (rr-P3HT) and silver(Ag) is investigated. The rr-P3HT is controllably doped using the acceptor 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ). We demonstrate that only one order of magnitude increase in the background hole density, from to , enhances the hole injection with two orders of magnitude. The hole injection barrier is lowered by 0.5 eV and exhibits a linear dependence on , which can be explained by doping induced surface charges.

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Scitation: Enhancement of the hole injection into regioregular poly(3-hexylthiophene) by molecular doping
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/8/10.1063/1.3464560
10.1063/1.3464560
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