Significant conductivity enhancement of PEDOT:PSS films treated with lithium salt solutions
Significant conductivity enhancement of PEDOT:PSS films treated with lithium salt solutions
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DOI：
10.1007/s10854-014-2417-x
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Zhengyou Zhu;Haijun Song;Jingkun Xu;Cong-cong Liu;Qinglin Jiang;Hui Shi
中科院分区：
文献类型：
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作者：
Zhengyou Zhu;Haijun Song;Jingkun Xu;Cong-cong Liu;Qinglin Jiang;Hui Shi
本文提出了一种利用LiClO4、Li2SO4、LiNO3等不同锂盐水溶液处理PEDOT:PSS薄膜，显著提高其导电性的有效方法。经LiClO4处理的PEDOT:PSS膜的最大电导率可达522 S cm−1，比纯PEDOT:PSS膜（0.2 S cm−1）提高了2610倍。FTIR表征表明，处理后PEDOT:PSS的化学结构没有发生变化。载流子迁移率的显著提高是电导率提高的关键原因。经LiClO4处理的PEDOT:PSS膜载流子迁移率最高可达3.8 cm2/Vs，比纯PEDOT:PSS膜的0.25 cm2/Vs高出约15倍。
An effective method to significantly enhance the electrical conductivity of PEDOT:PSS films through a treatment with various aqueous solutions of lithium salts such as LiClO4, Li2SO4 and LiNO3 etc., is presented in this paper. The maximum electrical conductivity of PEDOT:PSS film treated with LiClO4 could be up to 522 S cm−1, which was enhanced by a factor of 2,610 compared to that of pure PEDOT:PSS film (0.2 S cm−1). The FTIR spectra characterization was performed and suggested that the chemical structure of PEDOT:PSS didn’t change after the treatment. Remarkable improvement in carrier mobility was a key reason for the increase in the electrical conductivity. The highest carrier mobility of the PEDOT:PSS film by LiClO4 treatment could reach 3.8 cm2/Vs, approximately 15 times higher than that of pure PEDOT:PSS film with a value of 0.25 cm2/Vs.