Influence of process parameters on the electrical properties of offset printed conductive polymer layers

Reuter, K.; Kempa, H.; Brandt, N.; Bartzsch, M.; Huebler, A.C.

doi:10.1016/j.porgcoat.2007.01.004

Cited by 22 publications

(8 citation statements)

References 14 publications

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“…The measurements are in excellent accordance with these theoretical values (compare the SI, S5a–c and S6). Ink splitting undulations from hydrodynamic instabilities − are leveled (compare color reflections, Figure ), resulting in smooth functional films for inks with a concentration of 20 g L –1 and a solvent with a high boiling point.…”

Section: Resultsmentioning

confidence: 99%

Printing Poly(p-phenyleneethynylene) PLEDs

Smarsly

Daume

Tone

et al. 2018

ACS Appl. Mater. Interfaces

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Gravure printing of functional thin-film layers of side-chain-substituted poly(para-phenyleneethynylene)s (PPEs) is reported. Rheological properties of PPEs in combination with the Hansen solubility model allowed the formulation of enhanced single-component inks. Layer evaluation is performed with reflectometric thin-film recordings in an optical setup for laterally resolved large-area investigation using imaging color reflectometry. An organic light-emitting diode in a simple glass/indium tin oxide/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/PPE/LiF–Al stack was gravure-printed from the improved ink showing excellent luminance (542 cd m– 2, U = 11.5 V) for this polymer class.

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Section: Resultsmentioning

confidence: 99%

Printing Poly(p-phenyleneethynylene) PLEDs

Smarsly

Daume

Tone

et al. 2018

ACS Appl. Mater. Interfaces

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“…The formation of the present layer thickness undulations during the printing processes (also called viscous fingering or Saffman‐Taylor instability) are a common phenomenon in coating and printing applications and have been extensively studied 16, 17. The onset for the instability is a receding fluid meniscus confined between two walls with small distance as described and analyzed in the model geometry of a Hele‐Shaw cell 18.…”

Section: Gravure Printing Of Sy On Pedot:pssmentioning

confidence: 99%

Rheological and Drying Considerations for Uniformly Gravure‐Printed Layers: Towards Large‐Area Flexible Organic Light‐Emitting Diodes

Hernandez‐Sosa

Bornemann

Ringle

et al. 2013

Adv Funct Materials

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Printing organic semiconductor inks by means of roll-to-roll compatible techniques will allow a continuous, high-volume fabrication of large-area fl exible optoelectronic devices. The gravure printing technique is set to become a widespread process for the high throughput fabrication of functional layers. The gravure printing process of a poly-phenylvinylene derivative light-emitting polymer dissolved in a two solvent mixture on poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is studied. The surface tensions, contact angles, viscosities, and drying times of the formulations are investigated as a function of the solvent volume fraction and polymer concentration. The properties of the ink grant a homogeneous printed layer, suitable for device fabrication, when the calculated fi lm leveling time is shorter than a critical time, at which the fi lm has been frozen due to loss of solvent via evaporation. The knowledge obtained from the printing process is applied to fabricate organic light-emitting diodes (OLEDs) on fl exible substrates, yielding a luminance of ≈ 5000 cd m − 2 .

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“…for measuring the humidity [27]. Main challenges for the application are the complex procedure of creating an offset printable ink and the inhomogeneous film morphology because of the high viscosity of the ink and the ink splitting process [28]. Gravure printing is probably the most promising printing technology for organic electronics for a couple of reasons.…”

Section: Printing Technologies For Organic Electronic Devices and Cirmentioning

confidence: 99%