Effect of (3‐glycidyloxypropyl)trimethoxysilane (GOPS) on the electrical properties of PEDOT:PSS films

Håkansson, Anna; Han, Shaobo; Wang, Suhao; Lu, Jun; Braun, Slawomir; Fahlman, Mats; Berggren, Magnus; Fabiano, Simone

doi:10.1002/polb.24331

Cited by 202 publications

(255 citation statements)

References 28 publications

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“…Such changes can be interpreted as a structural transformation towards the benzoid conformation represented schematically in Figure S2 Only 0.5% vol/vol of GOPS was enough to dedope PEDOT:PSS and change the Fermi energy level from 4.95 to 4.82 eV. We note that it has been previously argued that the PEDOT:PSS crosslinking by GOPS does not change its doping level and only affects morphology (Håkansson et al, 2017). However, the distinct changes in Raman signatures and energetics measured here suggest there is an undesirable dedoping process that occurs upon GOPS crosslinking.…”

mentioning

confidence: 65%

A highly sensitive molecular structural probe applied to in situ biosensing of metabolites using PEDOT:PSS

Pappa²,

Pitsalidis³

et al. 2019

Biotech & Bioengineering

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A large amount of research within organic biosensors is dominated by organic electrochemical transistors (OECTs) that use conducting polymers such as poly(3,4‐ethylene dioxythiophene) doped with poly(styrenesulfonate) (PEDOT:PSS). Despite the recent advances in OECT‐based biosensors, the sensing is solely reliant on the amperometric detection of the bioanalytes. This is typically accompanied by large undesirable parasitic electrical signals from the electroactive components in the electrolyte. Herein, we present the use of in situ resonance Raman spectroscopy to probe subtle molecular structural changes of PEDOT:PSS associated with its doping level. We demonstrate how such doping level changes of PEDOT:PSS can be used, for the first time, on operational OECTs for sensitive and selective metabolite sensing while simultaneously performing amperometric detection of the analyte. We test the sensitivity by molecularly sensing a lowest glucose concentration of 0.02 mM in phosphate‐buffered saline solution. By changing the electrolyte to cell culture media, the selectivity of in situ resonance Raman spectroscopy is emphasized as it remains unaffected by other electroactive components in the electrolyte. The application of this molecular structural probe highlights the importance of developing biosensing probes that benefit from high sensitivity of the material's structural and electrical properties while being complimentary with the electronic methods of detection.

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mentioning

confidence: 65%

A highly sensitive molecular structural probe applied to in situ biosensing of metabolites using PEDOT:PSS

Pappa²,

Pitsalidis³

et al. 2019

Biotech & Bioengineering

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“…The shift of the PSS signal is very likely caused by the interaction between the –SO 3 − groups and GOPS. According to previous study, the signal at around 531.36 eV is assigned to the sulfonate groups with counter ions, while the signal at 532.67 eV is originated from the oxygen atoms in the ring formed with the ethylendioxy segment in PEDOT 39,42. As presented in Figure 2b, the O1s signal of PSS is gradually shifted towards higher binding energy upon addition of GOPS, underlining again the strong interaction between GOPS and excess PSS (which, by the way does not interact with PEDOT).…”

Section: Photovoltaic Performances Of Inverted Single Junction and Homentioning

confidence: 50%

“…An efficient ICL requires sufficient conductivity to minimize the parasitic electrical losses, which can significantly affect the performance of devices 13,25. To compensate the reduced conductivity upon adding GOPS,39 a mixture of highly conductive PH1000 and standard PEDOT:PSS 4083 with a volume ratio of 1:1 was used as HTL (m‐PEDOT:PSS). The chemical structures of PEDOT:PSS and GOPS are presented in Figure 1 a.…”

Section: Photovoltaic Performances Of Inverted Single Junction and Homentioning

confidence: 99%

A Cross‐Linked Interconnecting Layer Enabling Reliable and Reproducible Solution‐Processing of Organic Tandem Solar Cells

Liu

Gao

et al. 2020

Advanced Energy Materials

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The performance of tandem organic solar cells (OSCs) is directly related to the functionality and reliability of the interconnecting layer (ICL). However, it is a challenge to develop a fully functional ICL for reliable and reproducible fabrication of solution‐processed tandem OSCs with minimized optical and electrical losses, in particular for being compatible with various state‐of‐the‐art photoactive materials. Although various ICLs have been developed to realize tandem OSCs with impressively high performance, their reliability, reproducibility, and generic applicability are rarely analyzed and reported so far, which restricts the progress and widespread adoption of tandem OSCs. In this work, a robust and fully functional ICL is developed by incorporating a hydrolyzed silane crosslinker, (3‐glycidyloxypropyl)trimethoxysilane (GOPS), into poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), and its functionality for reliable and reproducible fabrication of tandem OSCs based on various photoactive materials is validated. The cross‐linked ICL can successfully protect the bottom active layer against penetration of high boiling point solvents during device fabrication, which widely broadens the solvent selection for processing photoactive materials with high quality and reliability, providing a great opportunity to continuously develop the tandem OSCs towards future large‐scale production and commercialization.

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“…For PEDOT:PSS‐based OECT applications, additives are used to improve the conductivity and as well as mechanical strength to avoid the delamination of the film when it is in contact with aqueous media. 3‐glycidoxypropyltrimethoxysilane (GOPS) and divinyl sulfone are the commonly used well‐known cross‐linkers . Dodecyl benzene sulfonic acid (DBSA) is widely used as a surfactant for film processing from the commercial suspension .…”

Section: Resultsmentioning

confidence: 99%

Conducting Polymer‐Based Biocomposites Using Deoxyribonucleic Acid (DNA) as Counterion

Tekoglu

Wielend

Scharber

et al. 2019

Adv Materials Technologies

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In this work, the preparation of conducting polymer‐based composites using a biological anionic polymer based on salmon deoxyribonucleic acid (DNA) is presented. The most commonly used polymers poly(3,4‐ethylenedioxythiophene) (PEDOT), as well as polypyrrole, are polymerized in the presence of DNA. Since conjugated polymers are in the polycationic state in their electrically conducting form, the role of the counterion is now fulfilled by the low cost biomolecule DNA as an alternative material, which is also a polyanion thanks to its phosphate chain. The resulting synthesized material is a conducting polymer–DNA biocomposite. Such materials are highly attractive for the rising field of bioelectronics and biosensors, especially in organic electrochemical transistors (OECTs) and ion pumps. OECTs made of these conducting polymer biocomposites are fabricated and their electrochemical device operation is compared to the most widely used PEDOT:polystyrenesulfonate.

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Effect of (3‐glycidyloxypropyl)trimethoxysilane (GOPS) on the electrical properties of PEDOT:PSS films

Cited by 202 publications

References 28 publications

A highly sensitive molecular structural probe applied to in situ biosensing of metabolites using PEDOT:PSS

A highly sensitive molecular structural probe applied to in situ biosensing of metabolites using PEDOT:PSS

A Cross‐Linked Interconnecting Layer Enabling Reliable and Reproducible Solution‐Processing of Organic Tandem Solar Cells

Conducting Polymer‐Based Biocomposites Using Deoxyribonucleic Acid (DNA) as Counterion

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