Roll to roll fabrication technologies for optoelectronic and electronic devices and sensors

Maaninen, Arto; Tuomikoski, Markus; Kivimäki, Liisa; Kololuoma, Terho; Välimäki, Marja; Leinonen, Marko E.; Känsäkoski, Markku

doi:10.1117/12.621601

Cited by 6 publications

(3 citation statements)

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“…and gravure offset printing [4]; and roller imprint processes, including hot-emboss roller imprint [5] and ultraviolet roller imprint [6]. These methods have already been used in some fields such as the preparation of optoelectronics [7], polymer microlen arrays [8] and large-area panel displays [3].…”

Section: Introductionmentioning

confidence: 99%

Investigation of ink transfer in a roller-reversal imprint process

Jiang

Ding

et al. 2008

J. Micromech. Microeng.

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Roller imprint is considered as one of the processes suitable for patterning on a large-area flexible substrate, which is critical for macroelectronics manufacturing. In contrast to other published roller imprint processes (such as hot-embossing roller imprint or ultraviolet roller imprint), the roller-reversal imprint (RRI) process investigated in this paper starts with pattern coating of an ink (mostly a liquefied electronics material, such as a semiconductor polymer) on a mould roller and ends with transferring the ink already patterned on the roller to the substrate, so it can obtain micropatterns with a precise profile yet leave no residual film on the substrate. One of the critical issues in obtaining patterned ink on the substrate with the required profile by the RRI process is to ensure a complete ink transfer from the microcavities on the mould roller onto the substrate. In this paper, a mathematical model is proposed to analyze the mechanics of the ink transfer, and a criterion for a complete ink transfer is derived. Furthermore, the effects of imprint force on the ink transfer are also demonstrated by an analysis of the elastic deformation of the substrate. The simulations and corresponding experiments show that the ink transfer in the RRI process is strongly dependent on the ratio of work of adhesion at the ink-mould and ink-substrate interfaces, and the critical ratio for a complete ink transfer is determined mainly by the profile of microcavities on the mould featured by the aspect ratio and the sidewall angle. The ink transfer model can be used to select proper materials (including the ink, surface energies of the mould roller and substrate) in the RRI process, and can also be regarded as a guideline for profile designing of the microcavities on the mould roller used in the RRI process.

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Section: Introductionmentioning

confidence: 99%

Investigation of ink transfer in a roller-reversal imprint process

Jiang

Ding

et al. 2008

J. Micromech. Microeng.

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“…The roll‐to‐roll techniques like die coating, gravure coating, doctor blade, etc. that were currently explored for PSCs were well introduced for the architecture of PEDOT–PSS‐based sensors, including flexible sensors . With the development of PEDOT–PSS chemistry, layer‐by‐layer assembling, drop‐casting, electrodeposition, langmuir‐blodgett, lithography, photolithography, electrospinning, dielectrophoretical assemble, combinatorial methods, and more are used for the application in PEDOT–PSS‐based sensors.…”

Section: Ecpsmentioning

confidence: 99%

Scientific Importance of Water‐Processable PEDOT–PSS and Preparation, Challenge and New Application in Sensors of Its Film Electrode: A Review

Wen

2017

J. Polym. Sci. Part A: Polym. Chem.

285

196

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In this review, PEDOT-PSS is mainly a commercially available PEDOT-PSS, which is a water-dispersible form of the intrinsically conducting PEDOT doped with the watersoluble PSS, including its derivatives, copolymers, analogs (PEDOT:PSSs), even their composites via the chemical or physical modification toward the structure of PEDOT and/or PSS. First, we will focus on discussing the scientific importance of PEDOT-PSS in conjunction with its extraordinary properties and broad multidisciplinary applications in organic/polymeric electronics and optoelectronics from the viewpoint of the historical development and the promising application of representative ECPs. Subsequently, versatile film-forming techniques for the preparation of PEDOT-PSS film electrode were described in details, including common coating approaches and printing techniques, and many emerging preparative methods were mentioned. Then challenges (e.g., conductivity, stability in Water, adhesion to substrate electrode) of PEDOT-

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“…For low-end and low-price but high-volume applications throughput will be a critical issue. The necessary manufacturing infrastructure as well as materials and processes need to be investigated and established [3]. One promising approach for realizing different colors is mixing small molecules into a printable host matrix [4][5].…”

Section: Introductionmentioning

confidence: 99%

22.4: Invited Paper: Tuning Solution Processed OLEDs Towards R2R Printing

Beierlein

Winnewissser

2008

Symp Digest of Tech Papers

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Solution processed OLEDs offer the potential for highest throughput production processes such as roll‐to‐roll (R2R) printing. We use polymer mixtures with additives to evaluate and optimize the performance. Such multi‐component systems open up a huge parameter space by varying layer thicknesses, material combinations and concentrations. Manual device fabrication would be time‐consuming and expensive. A new custom built and automated fabrication and characterization setup accelerates material screening, testing and optimization. Furthermore, a systematic set of devices is the basis for reliable comparisons with simulations.

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Roll to roll fabrication technologies for optoelectronic and electronic devices and sensors

Cited by 6 publications

References 0 publications

Investigation of ink transfer in a roller-reversal imprint process

Investigation of ink transfer in a roller-reversal imprint process

Scientific Importance of Water‐Processable PEDOT–PSS and Preparation, Challenge and New Application in Sensors of Its Film Electrode: A Review

22.4: Invited Paper: Tuning Solution Processed OLEDs Towards R2R Printing

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