Chemical and thermal treatment of PEDOT:PSS thin films for use in organic light emitting diodes

Nguyen, T.P.; Rendu, P. Le; Long, Pham Duy; Vos, S.A. de

doi:10.1016/j.surfcoat.2003.10.110

Cited by 87 publications

(63 citation statements)

References 8 publications

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“…This indicates the particularly significant role of formic acid as an organic liquid additive in enhancing conductivity of the deposited films. In a related study, 20 chemical treatment of the deposited films in acid solution showed a strong increase in conductivity, but the structure of the polymer was not affected by the treatment. This increase in conductivity is explained by the assumption that polar liquid additives induce segregation between PEDOT : PSS and the excess free PSS, 21 thus allowing better pathways to conduction.…”

Section: Methodsmentioning

confidence: 94%

Microstructured conducting polymer coatings on plastic strip for contact electrodes: Formulation and tuning of sheet resistance

Arulraj

Fotheringham

2007

J of Applied Polymer Sci

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Mechanically strong and flexible strips of cellulose acetate were used to support a thin coating of poly(3,4 ethylenedioxythiophene) : poly(styrene sulfonic acid) PEDOT : PSS, an intrinsically conducting polymer (ICP), formulated with an aqueous dispersion of judiciously chosen copolymer of vinyl acetate and ethylene (VAE), to impart adhesion of the coating onto the substrate. Incorporation of a few drops of an organic acid to the formulation resulted in a substantial reduction of the sheet resistance of the coated surface. When the coated strips were post-treated with a salt solution, a further fine tuning of the sheet resistance by a factor of 10 was achieved. The coated strips combine high conductivity with flexibility and mechanical strength. The performance of the coated strips has been evaluated in relationship to composition, coating thickness, and sheet resistance for application as contact electrodes.

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Section: Methodsmentioning

confidence: 94%

Microstructured conducting polymer coatings on plastic strip for contact electrodes: Formulation and tuning of sheet resistance

Arulraj

Fotheringham

2007

J of Applied Polymer Sci

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“…The strong acids adopted are usually HCl and H 2 SO 4 , and researchers have achieved an effective increase in the conductivity of PEDOT:PSS (Clevios P). [ 13,[114][115][116] Xia et al observed a conductivity of 3065 S cm −1 for PEDOT:PSS (Clevios PH 1000) fi lms treated with 1 M H 2 SO 4 at 160 °C for three times, the value is comparable to that of ITO. [ 117 ] More recently, Kim et al [ 14 ] reported the solution-processed crystalline formation in PEDOT:PSS via H 2 SO 4 post-treatment, and the conditions were rigorously controlled.…”

Section: Acid or Alkali Treatment And Ph Value Infl Uencesmentioning

confidence: 98%

Effective Approaches to Improve the Electrical Conductivity of PEDOT:PSS: A Review

Shi

Liu

Jiang

et al. 2015

Adv Elect Materials

936

812

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The rapid development of novel organic technologies has led to significant applications of the organic electronic devices such as light‐emitting diodes, solar cells, and field‐effect transistors. There is a great need for conducting polymers with high conductivity and transparency to act as the charge transport layer or electrical interconnect in organic devices. Poly(3,4‐ethylenedioxythiophene): poly(styrenesulfonic acid) (PEDOT:PSS), well‐known as the most remarkable conducting polymer, has this role owing to its good film‐forming properties, high transparency, tunable conductivity, and excellent thermal stability. In this Review, various of interesting physical and chemical approaches that can effectively improve the electrical conductivity of PEDOT:PSS are summarized, focusing especially on the mechanism of the conductivity enhancement as well as applications of PEDOT:PSS films. Prospects for future research efforts are also provided. It is expected that PEDOT:PSS films with high conductivity and transparency could be the focus of future organic electronic materials breakthroughs.

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“…[3][4][5] In the applications of organic photovoltaics (OPVs) and organic light-emitting diodes (OLEDs), PEDOT:PSS is often coated on the ITO, where the ITO is utilized as an anode and the PEDOT:PSS is as hole conducting layer. 6,7 OPVs or OLEDs with a PEDOT:PSS layer on top of an ITO anode have longer lifetime and higher photovoltaic performance than those using ITO anode alone. 8 The improvement in device stability can be attributed to the ability of the polymer coating to clean the anode surface that substantially slows down device degradation.…”

Section: Introductionmentioning

confidence: 99%

Improving the performance of ITO thin films by coating PEDOT:PSS

Chang

2014

Int. J. of Precis. Eng. and Manuf.-Green Tech.

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This work studies the effect of PEDOT:PSS on electrical, optical and mechanical properties of ITO glass. Various thickness PEDOT:PSS films are deposited on ITO glass by spin coating. The sheet resistance, transmittance, surface roughness, residual stress, friction, and critical load of the coated specimens are tested in sequence. We find that PEDOT:PSS films not only improve the electric performance but also increase the adhesion of ITO glass. The experimental results show that the PEDOT:PSS film improves the surface roughness and then results in a lower electric resistance. It also increases the adhesion and reduces the residual stress of the ITO films. Furthermore, only 1% transmittance is lost due to the PEDOT:PSS film, showing the potential in the applications of organic photovoltaic cells and light-emitting diodes.

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Chemical and thermal treatment of PEDOT:PSS thin films for use in organic light emitting diodes

Cited by 87 publications

References 8 publications

Microstructured conducting polymer coatings on plastic strip for contact electrodes: Formulation and tuning of sheet resistance

Microstructured conducting polymer coatings on plastic strip for contact electrodes: Formulation and tuning of sheet resistance

Effective Approaches to Improve the Electrical Conductivity of PEDOT:PSS: A Review

Improving the performance of ITO thin films by coating PEDOT:PSS

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