Improving the electrical conductivity of PEDOT:PSS films by binary secondary doping
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- 作者：Zhengyou Zhu ; Congcong Liu ; Jingkun Xu ; Qinglin Jiang…
- 关键词：PEDOT ; PSS ; electrical conductivity ; binary secondary doping ; lithium salt ; dimethyl sulfoxide
- 刊名：Electronic Materials Letters
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：12
- 期：1
- 页码：54-58
- 全文大小：668 KB
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Congcong Liu (1)
Jingkun Xu (1)
Qinglin Jiang (1)
Hui Shi (1)
Endou Liu (1)
1. Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang, 330013, China - 刊物类别：Chemistry and Materials Science
- 刊物主题：Condensed Matter Physics
Electronics, Microelectronics and Instrumentation
Optical and Electronic Materials
Thermodynamics
Characterization and Evaluation of Materials - 出版者：The Korean Institute of Metals and Materials, co-published with Springer Netherlands
- ISSN：2093-6788
文摘
In this work, the electrical conductivity of poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS) films was effectively enhanced by binary secondary doping. Initially, doping with 5 vol.% dimethyl sulfoxide (DMSO) improved the electrical conductivity from 0.3 S cm−1 to 437 S cm−1 and a further increase to 950 S cm−1 was achieved by adding LiClO4. The conductivity value we report here is one of the highest reported for pretreated PEDOT:PSS films. The obtained maximum electrical conductivity is almost 3000 times higher than that shown by pristine PEDOT:PSS films. The increase in the electrical conductivity is ascribed to the synergistic effect of the two dopants. Fourier transform infrared spectra indicated the absence of any changes to the chemical structure of PEDOT:PSS. Atomic force microscopy images demonstrate an increased surface roughness and suggest the occurrence of conformational changes of PEDOT chains from the coiled to coil-extended one, which is the key reason for the electrical conductivity enhancement. The pretreatments we propose here are rapid, simple and effective for the large-scale preparation of high-conductivity PEDOT:PSS films.