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Proceedings Paper

Novel ways to significantly enhance the conductivity of transparent PEDOT:PSS
Author(s): Benhu Fan; Yijie Xia; Jianyong Ouyang
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Paper Abstract

Two novel approaches are reported to significantly enhance the conductivity of transparent PEDOT:PSS (PEDOT:PSS = poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)). The first method is to add anionic surfactants into aqueous solution of PEDOT:PSS. Conductivity enhancement by a factor of hundreds was observed, and it was strongly dependent on the chemical structure of the surfactant. Conductivity enhancement from 0.16 S cm-1 to 80 S cm-1 was observed, when anionic surfactant SDS was added. The effect of the anionic surfactants on the conductivity of PEDOT:PSS was attributed to the substitution of the PSS anions by the surfactant anions. The addition of a nonionic surfactant had moderate effect on the conductivity of PEDOT:PSS, while cationic surfactant almost did not affect the conductivity. The second method to significantly enhance the conductivity is to treat the PEDOT:PSS film with solutions of certain salts. CuCl2 or InCl3 solution could enhance the conductivity by a factor of hundreds, while the effect by NaCl is negligible. The salt effect on the conductivity of PEDOT:PSS is attributed to the loss of PSS from PEDOT:PSS and conformational change of PEDOT chains during the treatment.

Paper Details

Date Published: 27 August 2009
PDF: 9 pages
Proc. SPIE 7415, Organic Light Emitting Materials and Devices XIII, 74151Q (27 August 2009); doi: 10.1117/12.826009
Show Author Affiliations
Benhu Fan, National Univ. of Singapore (Singapore)
Yijie Xia, National Univ. of Singapore (Singapore)
Jianyong Ouyang, National Univ. of Singapore (Singapore)


Published in SPIE Proceedings Vol. 7415:
Organic Light Emitting Materials and Devices XIII
Franky So; Chihaya Adachi, Editor(s)

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