Effects of the ink concentration on multi-layer gravure-printed PEDOT:PSS

Sico, Giuliano; Montanino, Maria; Mauro, Anna De Girolamo Del; Imparato, A.; Nobile, G.; Minarini, Carla

doi:10.1016/j.orgel.2015.10.031

Cited by 22 publications

(24 citation statements)

References 21 publications

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“…In a previous paper, we demonstrated the possibility to produce by gravure printing HC PEDOT:PSS layer suitable as transparent anode for electronic devices thanks to a multilayer approach, using IPA as process solvent; in fact, a single layer produced by the highest concentrated printable ink was not suitable as anode even when printed using high grammage cylinder [10]. Therefore, overlap of more printed layers was adopted as a possible solution.…”

Section: Resultsmentioning

confidence: 99%

“…The dimethylsulfoxide (DMSO) was added (5% by volume) in order to enhance its conductivity, as also suggested by the supplier [11]. This pristine solution, suitable for spin-coating deposition, was diluted by 1,2-isopropyl alcohol (IPA) in different weight ratios to decrease the viscosity and the surface tension, obtaining inks gravure printable without the use of any substrate pre-treatment [10]. The reference anodic layers were obtained spin coating the pristine solution at 800 rpm for 60 sec on PEN treated with Ultra Violet (UV)-ozone to improve the wettability of ink.…”

Section: Methodsmentioning

confidence: 99%

“…The multilayer structure was obtained by drying each layer at 140°C for 5 min before printing the next one. The optimized polymeric anode was found to be a three printed layers following a decreasing profile as reported elsewhere [10]. The drying time and temperature conditions were chosen to be industrially sustainable: shorter drying period results in a worst printing quality of the successive layer and the temperature was kept the same used for the final thermal annealing overnight.…”

Section: Methodsmentioning

confidence: 99%

“…Among the polymeric layer able to act as electrode, the highly conductive (HC) poly (3,4ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), obtained by the addition of dimethyl sulfoxide (DMSO), is one of the most promising candidates [9]. In an our previous work, gravure printing of HC PEDOT:PSS onto flexible polyethylene naphthalate (PEN) substrate was investigated with the aim to obtain a layer suitable to be used as transparent anode in flexible electronic [10]. Such layer was obtained thanks to an easy approach able to improve it in terms of morphological and electrical characteristics, and is based on the multilayer printing of inks having decreasing concentrations.…”

Section: Introductionmentioning

confidence: 99%

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Gravure printed PEDOT:PSS as anode for flexible ITO-free organic light emitting diodes

Montanino¹,

Sico²,

Prontera³

et al. 2017

Express Polym. Lett.

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Abstract. Roll-to-roll gravure printing is considered as potential leading manufacturing technology for flexible, low cost and large area optoelectronics. However, solution processed multilayer organic electronics are still challenging to be produced, especially in the case of electrodes. In this work, the gravure printing technique was successfully employed to realize the highly conductive poly(3,4ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) polymeric anode and tested for the first time in flexible ITO-free (Indium Thin Oxide) organic light emitting diodes (OLEDs). The device performances were found to be similar to those of a reference device containing a spin-coated polymeric anode. A gravure printed dimethyl sulfoxide (DMSO) post-treatment was successfully tried to improve the printed anode characteristics. The obtained results show the way for future development for processing flexible ITO-free devices using the most attractive printing technology for roll-to-roll large area manufacturing.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gravure printed PEDOT:PSS as anode for flexible ITO-free organic light emitting diodes

Montanino¹,

Sico²,

Prontera³

et al. 2017

Express Polym. Lett.

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show abstract

“…A blend of poly(ethylene dioxythiophene) and poly(styrene sulfonic acid) (PEDOT:PSS) is the most popular conductive polymeric material and can also serve as hole injection material in OLEDs or hole extraction material in solar cells. Roll‐to‐sheet gravure printing of PEDOT:PSS on PET at rather high speed (36 m min −1 ) has been demonstrated by Sico et al, who have achieved 130 Ω sq −1 at more than 80% transmission (at 550 nm) . Thicker layers were obtained by multiple printing, which also had a positive effect on the surface roughness.…”

Section: Printing and Coating Of Transparent Conductorsmentioning

confidence: 92%

Roll‐to‐Roll Fabrication of Solution Processed Electronics

Abbel¹,

2018

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The production of electronic devices using solution based ("wet") deposition technologies has some decisive technical and commercial advantages compared to competing approaches like vacuum based ("dry") manufacturing. Particularly, the potential to scale up production processes to large areas and high volumes by introducing continuous roll-to-roll (R2R) methods on flexible substrates has been the topic of intense studies from both applied research institutes and industry already for some years. Decisive steps forward have been achieved during that time, resulting in the dawn of commercial applications for a number of processes, while additional development work is still needed in some other fields. This review summarizes the work published during the last few years on the R2R printing and wet coating of electronic devices. An overview is presented of the basic operational principles for the most commonly used R2R printing and coating methods and techniques for proper web handling in R2R lines. Then, the most commonly used types of flexible substrate materials are introduced, followed by a review of the work published in the application areas of transparent conductor materials, printed electric connections, light emitting devices, photovoltaic energy generation, printed logic, and sensing.

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Printed pH Sensors for Textile‐Based Wearables: A Conceptual and Experimental Study on Materials, Deposition Technology, and Sensing Principles

et al. 2021

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Human biofluids contain numerous known physical and chemical biomarkers that play a vital role in diagnosing the human's health status. In healthy conditions, these biofluids maintain a strict pH balance with an efficient regulation, and slight changes in pH can be used as an early detector of malfunction or disease. Sweat is such a biofluid and normal sweat has a pH in the range of pH 4.5-6.8. [1] It is possible to track dehydration [2,3] or risk of diabetes [4] and detect cystic fibrosis [5] with the pH readings of perspiration/sputum/urine.Similarly, wound healing is a complex dynamic and multifaceted process consisting of hemostasis, inflammation, proliferation, and remodeling stages. [6] During these different stages, the wound fluid pH could vary between 4.5 and 8.5, [7,8] depending on the type of wound and its complexities in healing. A recent report indicates that the wound management expenditure has grown up to 4% of the health budget contribution in Europe. [9] However, with the help of accurate determination of the wound's pH, very essential physiological information can serve as a source to simplify the entire wound diagnosis and treatment practice. [10][11][12] pH is a measure of acidity or basicity, and in 1909, Sørensen defined the pH scale as the H þ ion molar concentration on a negative logarithm scale. [13] In the same year, scientists developed a pH sensitive glass electrode. [14] Arnold Beckman designed the very first commercial pH measurement system in 1936, which brought about the production of commercial pH meters. [15] It consisted of glass electrodes where the potential difference between the working and reference electrodes indicate the analyte's pH. Those sensor systems are highly sensitive to H þ ions and stable, however, they are fragile, bulky and do not have a suitable form factor to be incorporated for human body in situ measurements. pH sensors

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Effects of the ink concentration on multi-layer gravure-printed PEDOT:PSS

Cited by 22 publications

References 21 publications

Gravure printed PEDOT:PSS as anode for flexible ITO-free organic light emitting diodes

Gravure printed PEDOT:PSS as anode for flexible ITO-free organic light emitting diodes

Roll‐to‐Roll Fabrication of Solution Processed Electronics

Printed pH Sensors for Textile‐Based Wearables: A Conceptual and Experimental Study on Materials, Deposition Technology, and Sensing Principles

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