Highly conductive PEDOT:PSS films by post-treatment with dimethyl sulfoxide for ITO-free liquid crystal display

In this study, a simple and effective method to enhance the conductivity of poly(3,4-ethylenedioxythiphene):poly(styrenesulfonate) (PEDOT:PSS) thin films from 0.7 to 1185 S cm −1 by post-treatment with dimethyl sulfoxide (DMSO) is demonstrated. After the rubbing technique was applied, the DMSO-treat...

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Published inJournal of materials chemistry. C, Materials for optical and electronic devices Vol. 3; no. 15; pp. 376 - 3766
Main Authors Chou, Tsu-Ruey, Chen, Szu-Hua, Chiang, Yen-Te, Lin, Yi-Ting, Chao, Chih-Yu
Format Journal Article
LanguageEnglish
Published 01.01.2015
Subjects
Dimethyl sulfoxide
Electrodes
Electrooptical
Liquid crystal displays
Liquid crystals
Polyimide resins
Rubbing
Thin films
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Summary:In this study, a simple and effective method to enhance the conductivity of poly(3,4-ethylenedioxythiphene):poly(styrenesulfonate) (PEDOT:PSS) thin films from 0.7 to 1185 S cm −1 by post-treatment with dimethyl sulfoxide (DMSO) is demonstrated. After the rubbing technique was applied, the DMSO-treated PEDOT:PSS film could be used as both the transparent electrode and the alignment layer to fabricate ITO-free liquid crystal (LC) cells. The electro-optical properties of LC cells fabricated by the rubbed PEDOT:PSS were comparable to those constructed by ITO and polyimide. This work indicates that the highly conductive PEDOT:PSS film is a promising material for ITO-free LC devices. This work shows that the highly conductive PEDOT:PSS film is a promising material as both the transparent electrode and the alignment layer to replace ITO for ITO-free LC displays.
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ISSN:2050-7526
2050-7534
DOI:10.1039/c5tc00276a