Purification of PEDOT:PSS by Ultrafiltration for Highly Conductive Transparent Electrode of All-Printed Organic Devices

Soyeon Kim, Bernardi Sanyoto, Won Tae Park, Seyul Kim, Saumen Mandal, Jong Choo Lim, Yong Young Noh, Jung-Hyun Kim

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

A facile and mass scalable method to obtain highly conductive and air stable poly(3,4-ethylenedioxythiophene) poly(4-styrenesulfonate) (PEDOT:PSS) formulation for transparent electrode using ultrafiltration was reported. PEDOT:PSS was synthesized by emulsion polymerization following the Baytron P procedure. Over-oxidation was avoided by controlling synthesis factors and the pristine PEDOT:PSS had relatively high conductivity. The final PEDOT:PSS dispersion consisted mainly of a complex of PEDOT:PSS, uncomplexed free PSS, and various impurities such as residual oxidants, 3,4-ethylenedioxythiophene oligomers, and excess electrolytes. The synthesized polymer dispersion was washed out of the cell through the membrane by distilled de-ionized (DDI) water, which flowed continuously into the ultrafiltration cell to maintain a stable concentration of PEDOT:PSS dispersion in the feed solution. PEDOT:PSS solutes were estimated to be almost 100 nm, since a small amount of unfiltered PEDOT:PSS was observed after filtration at 100 nm membrane pore size. The removal of PSS from PEDOT:PSS dispersion after ultrafiltration was confirmed by X-ray photoelectron spectroscope (XPS). The transparent and flexible PEDOT:PSS electrode was applied as S/D electrodes in printed OFETs by spray printing with a shadow mask. Purified PEDOT:PSS film showed better ambient stability as compare with the pristine PEDOT:PSS. CMOS inverters were demonstrated using DPPT-TT and P(NDI2OD-T2) FETs, and showed higher gain voltage and lower power consumption at supply voltage.

Original languageEnglish
Pages (from-to)10149-10154
Number of pages6
JournalAdvanced Materials
Volume28
Issue number46
DOIs
Publication statusPublished - 2016 Jan 1

Fingerprint

Ultrafiltration
Purification
Electrodes
Membranes
Organic field effect transistors
Emulsion polymerization
Electric potential
Field effect transistors
Photoelectrons
Oxidants
Oligomers
Pore size
Printing
Masks
Electric power utilization
Electrolytes
Impurities
X rays
Oxidation
poly(3,4-ethylene dioxythiophene)

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Kim, Soyeon ; Sanyoto, Bernardi ; Park, Won Tae ; Kim, Seyul ; Mandal, Saumen ; Lim, Jong Choo ; Noh, Yong Young ; Kim, Jung-Hyun. / Purification of PEDOT:PSS by Ultrafiltration for Highly Conductive Transparent Electrode of All-Printed Organic Devices. In: Advanced Materials. 2016 ; Vol. 28, No. 46. pp. 10149-10154.
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Purification of PEDOT:PSS by Ultrafiltration for Highly Conductive Transparent Electrode of All-Printed Organic Devices. / Kim, Soyeon; Sanyoto, Bernardi; Park, Won Tae; Kim, Seyul; Mandal, Saumen; Lim, Jong Choo; Noh, Yong Young; Kim, Jung-Hyun.

In: Advanced Materials, Vol. 28, No. 46, 01.01.2016, p. 10149-10154.

Research output: Contribution to journalArticle

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