Conductive channel formation for enhanced electrical conductivity of PEDOT:PSS with high work-function

Inho Song; Na Yeon Park; Gwan Seung Jeong; Ju Hwan Kang; Jung Hwa Seo; Jea Young Choi

doi:10.1016/j.apsusc.2020.147176

Conductive channel formation for enhanced electrical conductivity of PEDOT:PSS with high work-function

Inho Song, Na Yeon Park, Gwan Seung Jeong, Ju Hwan Kang, Jung Hwa Seo, Jea Young Choi

Department of Physics

Dong-A University

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

In this study, we report a facile electrical conductivity improvement method for poly (3,4-ethylenedioxythiophene):poly (4-styrenesulfonate) (PEDOT:PSS), which is one of the most widely studied conductive polymers and used for many electronic applications. From our study, we successfully demonstrated that simple hydroquinone (HQ) addition to pristine PEDOT:PSS aqueous solution can dramatically increase the conductivity of PEDOT:PSS thin film from 0.7 S/cm to 1394 S/cm even without removal of an insulator-like PSS from coated PEDOT:PSS thin film. We demonstrated that this superior conductivity enhancement without PSS removal is originated from promoted phase separation between conductive PEDOT and insulating PSS after HQ addition which acts as a proton (H⁺) donor for PEDOT:PSS. Due to our conductivity enhancement method excluding PSS-removal, high work-function property of PEDOT:PSS is also well preserved which is highly crucial for optoelectronic device application of conductive PEDOT:PSS as a transparent electrode.

Original language	English
Article number	147176
Journal	Applied Surface Science
Volume	529
DOIs	https://doi.org/10.1016/j.apsusc.2020.147176
State	Published - 1 Nov 2020

Keywords

Conductive polymer
Conductivity
Hydroquinone
PEDOT:PSS
Transparent electrode
Work-function

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title = "Conductive channel formation for enhanced electrical conductivity of PEDOT:PSS with high work-function",

abstract = "In this study, we report a facile electrical conductivity improvement method for poly (3,4-ethylenedioxythiophene):poly (4-styrenesulfonate) (PEDOT:PSS), which is one of the most widely studied conductive polymers and used for many electronic applications. From our study, we successfully demonstrated that simple hydroquinone (HQ) addition to pristine PEDOT:PSS aqueous solution can dramatically increase the conductivity of PEDOT:PSS thin film from 0.7 S/cm to 1394 S/cm even without removal of an insulator-like PSS from coated PEDOT:PSS thin film. We demonstrated that this superior conductivity enhancement without PSS removal is originated from promoted phase separation between conductive PEDOT and insulating PSS after HQ addition which acts as a proton (H+) donor for PEDOT:PSS. Due to our conductivity enhancement method excluding PSS-removal, high work-function property of PEDOT:PSS is also well preserved which is highly crucial for optoelectronic device application of conductive PEDOT:PSS as a transparent electrode.",

keywords = "Conductive polymer, Conductivity, Hydroquinone, PEDOT:PSS, Transparent electrode, Work-function",

author = "Inho Song and {Yeon Park}, Na and {Seung Jeong}, Gwan and {Hwan Kang}, Ju and {Hwa Seo}, Jung and Choi, {Jea Young}",

note = "Publisher Copyright: {\textcopyright} 2020 The Author(s)",

year = "2020",

month = nov,

day = "1",

doi = "10.1016/j.apsusc.2020.147176",

language = "English",

volume = "529",

journal = "Applied Surface Science",

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T1 - Conductive channel formation for enhanced electrical conductivity of PEDOT:PSS with high work-function

AU - Song, Inho

AU - Yeon Park, Na

AU - Seung Jeong, Gwan

AU - Hwan Kang, Ju

AU - Hwa Seo, Jung

AU - Choi, Jea Young

PY - 2020/11/1

Y1 - 2020/11/1

N2 - In this study, we report a facile electrical conductivity improvement method for poly (3,4-ethylenedioxythiophene):poly (4-styrenesulfonate) (PEDOT:PSS), which is one of the most widely studied conductive polymers and used for many electronic applications. From our study, we successfully demonstrated that simple hydroquinone (HQ) addition to pristine PEDOT:PSS aqueous solution can dramatically increase the conductivity of PEDOT:PSS thin film from 0.7 S/cm to 1394 S/cm even without removal of an insulator-like PSS from coated PEDOT:PSS thin film. We demonstrated that this superior conductivity enhancement without PSS removal is originated from promoted phase separation between conductive PEDOT and insulating PSS after HQ addition which acts as a proton (H+) donor for PEDOT:PSS. Due to our conductivity enhancement method excluding PSS-removal, high work-function property of PEDOT:PSS is also well preserved which is highly crucial for optoelectronic device application of conductive PEDOT:PSS as a transparent electrode.

AB - In this study, we report a facile electrical conductivity improvement method for poly (3,4-ethylenedioxythiophene):poly (4-styrenesulfonate) (PEDOT:PSS), which is one of the most widely studied conductive polymers and used for many electronic applications. From our study, we successfully demonstrated that simple hydroquinone (HQ) addition to pristine PEDOT:PSS aqueous solution can dramatically increase the conductivity of PEDOT:PSS thin film from 0.7 S/cm to 1394 S/cm even without removal of an insulator-like PSS from coated PEDOT:PSS thin film. We demonstrated that this superior conductivity enhancement without PSS removal is originated from promoted phase separation between conductive PEDOT and insulating PSS after HQ addition which acts as a proton (H+) donor for PEDOT:PSS. Due to our conductivity enhancement method excluding PSS-removal, high work-function property of PEDOT:PSS is also well preserved which is highly crucial for optoelectronic device application of conductive PEDOT:PSS as a transparent electrode.

KW - Conductive polymer

KW - Conductivity

KW - Hydroquinone

KW - PEDOT:PSS

KW - Transparent electrode

KW - Work-function

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U2 - 10.1016/j.apsusc.2020.147176

DO - 10.1016/j.apsusc.2020.147176

M3 - Article

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SN - 0169-4332

VL - 529

JO - Applied Surface Science

JF - Applied Surface Science

M1 - 147176

ER -

Conductive channel formation for enhanced electrical conductivity of PEDOT:PSS with high work-function

Abstract

Keywords

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