Influence of ionic liquids on the electrical conductivity and morphology of PEDOT:PSS films

被引:244
作者
Dobbelin, Markus
Marcilla, Rebeca
Salsamendi, Maitane
Pozo-Gonzalo, Cristina
Carrasco, Pedro M.
Pomposo, Jose A.
Mecerreyes, David
机构
[1] CIDETEC, New Mat Dept, E-20009 San Sebastian, Spain
[2] CIC NANOGUNE Consolider, E-20009 San Sebastian, Spain
关键词
D O I
10.1021/cm070398z
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Small-molecule nonvolatile additives based on ionic liquids (IL) as electrical conductivity enhancer in Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) was studied. Ionic liquids were investigated in the synthesis of self-assembled, highly organized hybrid nanostructures due to their ability as supramolecular solvents. Different percentage of five ionic liquids, such as 1-butyl-3-methylimidazolium tetrafluoroborate (bmim) F 4 and 1-butyl-3-methylimidazolium bromide (bmim)Br were added to a PEDOT:PSScommercial dispersion. Films of pure PEDOT:PSS showed an average conductivity of 14 S cm-1, which corresponded to the value range given by the supplier. AFM images showed that IL induced the formation of a three-dimensional conducting network with smaller PEDOT domains. The ionic character of the films was significantly increased because of the presence of ionic liquids, which can be used effectively in optoelectronic devices.
引用
收藏
页码:2147 / 2149
页数:3
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