Improvement of PEDOT:PSS linearity <i>via</i> controlled addition process

Lee, Hongjoo J.; Kim, Youngno; Cho, Hangyeol; Lee, Jin Geun; Kim, Jung Hyun

doi:10.1039/c9ra03040a

Cited by 25 publications

(19 citation statements)

References 43 publications

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“…In comparison with neat PEDOT:PSS, the characteristic two-theta peaks of ISHCP-400 showed a shift from 18.6° to 19.2° and from 24.7° to 25.8°. This phenomenon indicates reduced d (010) spacing, which implies a decrease in the interchain π-π stacking distance of PEDOT and crystallization enhancement 28,29 . Conformational change of ISHCP-400 films under strain was observed on thin films coated on SEBS substrates (Fig.…”

Section: Resultsmentioning

confidence: 99%

Design of intrinsically stretchable and highly conductive polymers for fully stretchable electrochromic devices

Kim

Park

et al. 2020

Sci Rep

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Stretchable materials are essential for next generation wearable and stretchable electronic devices. Intrinsically stretchable and highly conductive polymers (termed ISHCP) are designed with semi interpenetrating polymer networks (semi-IPN) that enable polymers to be simultaneously applied to transparent electrodes and electrochromic materials. Through a facile method of acid-catalyzed polymer condensation reaction, optimized ISHCP films show the highest electrical conductivity, 1406 S/cm, at a 20% stretched state. Without the blending of any other elastomeric matrix, ISHCP maintains its initial electrical properties under a cyclic stretch-release of over 50% strain. A fully stretchable electrochromic device based on ISHCP is fabricated and shows a performance of 47.7% ∆T and high coloration efficiency of 434.1 cm2/C at 590 nm. The device remains at 45.2% ∆T after 50% strain stretching. A simple patterned electrolyte layer on a stretchable electrochromic device is also realized. The fabricated device, consisting of all-plastic, can be applied by a solution process for large scale production. The ISHCP reveals its potential application in stretchable electrochromic devices and satisfies the requirements for next-generation stretchable electronics.

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Section: Resultsmentioning

confidence: 99%

Design of intrinsically stretchable and highly conductive polymers for fully stretchable electrochromic devices

Kim

Park

et al. 2020

Sci Rep

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“…Evidently, two features are observed for all films which are located at ~ 17.6° and ~ 26° of angular positions. The peak centered at ~ 17.6° corresponds to PSS unit whereas peak centered at ~ 26° corresponds to interchain planar ring stacking distance of PEDOT [43,44]. On the normalized intensity scale, we observed a nominal suppression of PSS-related peak (~ 17.6°) for both composites.…”

Section: Resultsmentioning

confidence: 74%

Graphene oxide-doped PEDOT:PSS as hole transport layer in inverted bulk heterojunction solar cell

Özcan

Erer

Vempati

et al. 2020

J Mater Sci: Mater Electron

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Transparent poly (3,4-ethylenedioxythiophene): poly (styrenesulfonate) (PEDOT:PSS) is widely used hole conducting material in optoelectronic devices. Secondary doping of PEDOT:PSS enables the tunability of its electronic properties. In this work, graphene oxide (GO) was used as a secondary dopant for PEDOT:PSS and the doped materials (composites) were tested for their efficiency as hole transport material in inverted bulk heterojunction (BHJ) solar cell. The composites were studied to unveil the effects of Coulombic interaction between GO and PEDOT:PSS where we note some segregation of PEDOT phase. We found that the GO majorly interacts with PSS through oxygeneous functional groups which promote the detachment of PEDOT from PSS and segregation of PEDOT. Electrochemical properties with and without illumination revealed some photo-induced changes to surface of the samples. Device performances showed about 2.2% efficiency enhancement when GO doping level was 0.25 (v:v) when compared to that of pristine PEDOT:PSS.

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“…In other samples, the two diffraction peaks are attributed to the d (100) between the successive PEDOT backbone chains. The peak at two-theta = 6.68 • shifted to 6.42 • , which suggests a broadened d (100) spacing [22,23]. Its shift to a lower angle corresponds to the change from a coiled structure to a planar lamellar stacked structure.…”

Section: Resultsmentioning

confidence: 96%

Highly Conductive PEDOT:PSS Thin Films with Two-Dimensional Lamellar Stacked Multi-Layers

Kim

2020

Nanomaterials

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Conjugated polymers are desired as organic electrode materials because of their functional properties such as solution process, low cost, and transparency. Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), in particular, shows the highest applicability, but its heterogeneous structure presents limitations in terms of electrical conductivity. In this study, a facile method to fabricate multi-layered thin films with higher ordered structures was developed. Through the etching process with H2SO4 and dimethyl sulfoxide(DMSO), the insulated rich-PSS was removed from the upper layer to improve its electrical properties and rearrange the PEDOT molecular structures. The thickness of PEDOT:PSS thin films was experimentally optimized to maximize the enhancement of carrier mobility via a layer-by-layer (LBL) process. The combined method, consisted of etching and the LBL process, showed the improvement of the charge carrier mobility from 0.62 to 2.80 cm2 V−1 s−1. The morphology and crystallinity of the ordered PEDOT:PSS structure were investigated by X-ray photoemission spectroscopy (XPS), Raman, and X-ray diffraction (XRD). As a result, two-dimensional lamellar-stacked PEDOT:PSS thin films were fabricated through the repetitive etching and LBL process. The optimized PEDOT:PSS thin film showed an excellent electrical conductivity of 3026 S cm−1, which is 3.8 times higher than that of the pristine film (801 S cm−1).

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Improvement of PEDOT:PSS linearity via controlled addition process

Abstract: PEDOT:PSS linearity enhancement using controlled addition process.

Cited by 25 publications

References 43 publications

Design of intrinsically stretchable and highly conductive polymers for fully stretchable electrochromic devices

Design of intrinsically stretchable and highly conductive polymers for fully stretchable electrochromic devices

Graphene oxide-doped PEDOT:PSS as hole transport layer in inverted bulk heterojunction solar cell

Highly Conductive PEDOT:PSS Thin Films with Two-Dimensional Lamellar Stacked Multi-Layers

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