Enhancement of electrical conductivity of poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) by a change of solvents
Enhancement of electrical conductivity of poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) by a change of solvents
复制标题
DOI：
10.1016/s0379-6779(01)00576-8
复制
发表时间：
2002-02-14
期刊：
影响因子：
4.4
通讯作者：
Joo, J
中科院分区：
文献类型：
--
作者：
Kim, JY;Jung, JH;Joo, J
测定了掺杂聚（4-苯乙烯磺酸盐）（PSS）的聚（3,4-乙烯二氧噻吩）（PEDOT）在不同有机溶剂中的直流电导率（DC）。溶剂为二甲亚砜（DMSO）、N，N-二甲基甲酰胺（DMF）、四氢呋喃（THF）和水（作为原始溶剂）。PEDOT/PSS膜的室温直流电导率[σ (DC)(RT)]接近0.8 S/cm。通过溶剂的变化，样品的sigma(DC)（RT）从接近0.8 S/cm增加到接近80 S/cm。PEDOT/PSS与H2O的直流电导率[sigma(DC)(T)]的温度依赖关系遵循准一维变范围跳变模型，而由DMSO、DMF和THF制备的PEDOT/PSS的直流电导率[sigma(DC)(T)]遵循幂律（sigmaDC与T- β成正比）。x射线衍射（XRD）、x射线光电子能谱（XPS）和电子顺磁共振（EPR）实验表明，不同溶剂体系的掺杂浓度基本相同。我们分析了溶剂的筛选作用对PEDOT/PSS体系的sigma（DC）的变化起着重要的作用。(C) 2002 Elsevier Science B.V.版权所有
The DC conductivity (sigma(DC)) of poly(3,4-ethylenedioxythiophene) (PEDOT) doped with poly(4-styrenesulfonate) (PSS) with various organic solvents was measured. The solvents used were dimethyl sulfoxide (DMSO), N,N-dimethyl formamide (DMF), tetrahydrofuran (THF), and H2O (as pristine solvent). Room temperature DC conductivity [sigma(DC)(RT)] of a free standing film of PEDOT/PSS with H2O was measured to be similar to0.8 S/cm. Through a change of solvents used, sigma(DC)(RT) of the samples increases from similar to0.8 to similar to80 S/cm. The temperature dependence of DC conductivity [sigma(DC)(T)] of PEDOT/PSS with H2O followed a quasi one-dimensional variable range hopping model, while that of PEDOT/PSS prepared from DMSO, DMF, and THF followed a power law (sigmaDC proportional to T-beta). From X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and electron paramagnetic resonance (EPR) experiments, the doping concentration of the systems with different solvents was approximately the same. We analyzed that the screening effect of the solvent plays an important role for the variation of sigma(DC) of the PEDOT/PSS systems. (C) 2002 Elsevier Science B.V. All rights reserved.