A morphological model for the solvent-enhanced conductivity of PEDOT:PSS thin films

被引：320

作者：

Nardes, Alexandre Mantovani ^{[1
]}

Janssen, Rene A. J. ^{[1
]}

Kemerink, Martijn ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands

来源：

ADVANCED FUNCTIONAL MATERIALS | 2008年 / 18卷 / 06期

关键词：

D O I：

10.1002/adfm.200700796

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The well-known enhanced conductivity of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) thin films that is obtained by addition of high-boiling solvents like sorbitol to the aqueous dispersion used for film deposition is shown to be associated with a rearrangement of PEDOT-rich clusters into elongated domains, as evidenced from STM and AFM. Consistently, temperature dependent conductivity measurements for sorbitol-treated films reveal that charge transport occurs via quasi ID variable range hopping (VRH), in contrast to 3D VRH for untreated PEDOT:PSS films. The typical hopping distance of 60-90 nm, extracted from the conductivity measurements is consistent with hopping between the 30-40 nm sized grains observed with scanning probe microscopy.

引用

页码：865 / 871

页数：7

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