Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 26, Issue 1, Pages 429-434Publisher
SPRINGER
DOI: 10.1007/s10854-014-2417-x
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Funding
- National Natural Science Foundation of China [51203070, 51303073]
- Jiangxi Provincial Department of Education [GJJ13565]
- Jiangxi Provincial Department of Science and Technology [20142BAB216032]
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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 cm(2)/Vs, approximately 15 times higher than that of pure PEDOT:PSS film with a value of 0.25 cm(2)/Vs.
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