Study of the effect of DMSO concentration on the thickness of the PSS insulating barrier in PEDOT:PSS thin films

被引：126

作者：

Cruz-Cruz, I. ^{[2
]}

Reyes-Reyes, M. ^{[2
]}

Aguilar-Frutis, M. A. ^{[3
]}

Rodriguez, A. G. ^{[2
]}

Lopez-Sandoval, R. ^{[1
]}

机构：

[1] IPICYT, Adv Mat Dept, San Luis Potosi 78216, Mexico

[2] Univ Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi 78000, Mexico

[3] Inst Politecn Nacl, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Mexico City 11500, DF, Mexico

来源：

SYNTHETIC METALS | 2010年 / 160卷 / 13-14期

关键词：

PEDOT; Impedance spectroscopy; DMSO; POLY(3,4-ETHYLENE DIOXYTHIOPHENE)-POLY(STYRENE SULFONATE); CONDUCTING POLYMER; AC CONDUCTIVITY; EXPERIMENTAL LIMITATIONS; ELECTRICAL-CONDUCTIVITY; IMPEDANCE SPECTROSCOPY; DIELECTRIC-RELAXATION; ALTERNATING-CURRENT; SOLAR-CELLS; MORPHOLOGY;

D O I：

10.1016/j.synthmet.2010.05.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

One of the most used secondary dopants in thin film processing of PEDOT:PSS is dimethyl sulfoxide (DMSO). In this work, we present results that explain, from the point of view of impedance spectroscopy, the mechanism of the increase in the conductivity observed on films based on PEDOT:PSS. The results obtained with this technique, combined with others such as AFM, and Raman and UV-vis-NIR spectroscopies, clearly show that there is a thinning of the insulating barrier of PSS surrounding conductive grains of PEDOT. It is shown that the thickness of the insulating barrier is related strongly and inversely with the onset frequency of AC conductivity. However, this is not the only existing effect, because for values beyond the optimal concentration of DMSO, we observe a decrease in the conductivity related with an increase of the separation of the PEDOT grains. The AC measurements and the AFM images also show the clear interplay between the increase of the PEDOT average grain size and the separation between them. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1501 / 1506

页数：6

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