A new wettability‐control technique for fabricating color OLED panels by an ink‐jet‐printing method

Ueno, S.; Taguchi, Yousuke; Saeki, Kosuke; Okada, Masato; Nagino, Shinsuke; Hashimoto, Keisuke; Tachikawa, Tomoyuki

doi:10.1889/jsid19.1.87

Cited by 3 publications

(4 citation statements)

References 7 publications

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“…Ueno et al reported the fabrication technique for color OLED panels by means of wettability-controllable hole-injection material and a photocatalytic lithography method achieved both precise inkjet printing and long-lifetime devices. 207 The non-wetting surface of a hole-injection layer of metal-oxide nanoparticles was selectively changed into a wetting surface without damage to the device performance. Wetting patterns formed by this method with photocatalyst-coated photomasks made it possible to print emission material with patterns precisely 98 mm in width on the hole-injection layer.…”

Section: Cm) (C)mentioning

confidence: 99%

Patterning of controllable surface wettability for printing techniques

2013

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Patterning of controllable surface wettability has attracted wide scientific attention due to its importance in both fundamental research and practical applications. In particular, it is crucial to form clear image areas and non-image areas in printing techniques based on wetting and dewetting. This review summarizes the recent research on and applications of patterning of controllable surface wettability for printing techniques, with a focus on the design and fabrication of the precise surface wettability patterning by enhancing the contrast of hydrophilicity and hydrophobicity, such as superhydrophilicity and superhydrophobicity. The selected topics mainly include patterned surface wettability for lithographic printing with different plate-making techniques, patterned surface wettability for microcontact printing with a patterned wetting stamp and special wettability mediated patterning microtransfer printing, patterned surface wettability for inkjet printing with controllable surface wettability of the substrate and printing head to ink, and patterned surface wettability by a combination of different printing techniques. A personal perspective on the future development and remaining challenges of this research is also briefly discussed.

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Section: Cm) (C)mentioning

confidence: 99%

Patterning of controllable surface wettability for printing techniques

2013

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“…2e . Using the acceleration coefficient of 1.7, the LT 50 lifetime of device “TG-P” at 100 cd m −2 is estimated to be over 4000 hours 33 . The storage lifetime of paper-based OLEDs is also investigated (Fig.…”

Section: Resultsmentioning

confidence: 99%

A flexible, multifunctional, optoelectronic anticounterfeiting device from high-performance organic light-emitting paper

et al. 2022

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As a primary anticounterfeiting technology, most paper anticounterfeiting devices take advantage of photoresponsive behaviors of certain security materials or structures, thus featuring low-security threshold, which has been a critical global issue. To incorporate optoelectronic devices into existing anticounterfeiting technology suggests a feasible avenue to address this challenge. Here we report a high-performance organic light-emitting paper-based flexible anticounterfeiting (FAC) device with multiple stimuli-responsiveness, including light, electricity, and their combination. Without sacrificing the preexisted security information on the paper, we fabricate FAC device in a facile, low-cost yet high-fidelity fashion by integrating patterned electro-responsive and photo-responsive organic emitters onto paper substrates. By introducing optical microcavities, the FAC device shows considerable color shift upon different viewing angle and applied voltage, which is easily discernible by naked eyes. Notably, the FAC device is bendable, unclonable, and durable (a half-lifetime over 4000 hours at 100 cd m−2).

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“…The coalescence defect has been highlighted previously for various meniscus guide coating methods, including the conventional slot die approach illustrated in Figure c,d, as a significant practical limitation on the minimum stripe spacing for wide-area coating. , By virtue of the support material codeposited between neighboring parallel stripes, the heterogeneous stripe slot coating approach illustrated in Figure a,b ensures that coalescence defects do not occur. While conventional approaches can be combined with selective wettability enhancements to the substrate to accomplish this same goal, ,,, the approach in Figure a,b may be preferable where cost and simplicity of the manufacturing approach are critical.…”

Section: Materials and Methodsmentioning

confidence: 99%

“…Single-step deposition of complex features has previously been demonstrated using a variety of printing techniques such as flexography, − gravure printing, , screen printing, − inkjet, − and aerosol, , as well as meniscus guide coating methods including direct-write, − blade coating, − solution shearing, − and slot die coating. ,− Meniscus guide techniques offer unique possibilities for control over pattern morphology, film crystallinity, and microstructure alignment through viscous shear, evaporation, and controlled wetting phenomena. ,, On the other hand, printing-derived approaches are widely recognized as most suitable for high-throughput deposition across a wide area. ,,, …”

Section: Introductionmentioning

confidence: 99%

Scalable, Alternating Narrow Stripes of Polyvinyl Alcohol Support and Unmodified PEDOT:PSS with Maintained Conductivity Using a Single-Step Slot Die Coating Approach

Parsekian

Harris

2019

ACS Appl. Mater. Interfaces

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Slot die coating has been established as an economical approach for deposition of parallel narrow stripes, a constituent pattern feature in many printed device applications. However, the minimum feature size that can be achieved using this approach is constrained by wetting and liquid bridge phenomena at the deposition region. We hypothesize that pattern resolution and process control can be improved by co-depositing a support fluid to stabilize the pattern. Electrically conductive poly(3,4ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is slot die-coated in parallel stripes on flexible poly(ethylene terephthalate) substrate, without wettability-enhancing dopants or substrate pretreatment. A miscible liquid phase, polyvinyl alcohol, is used as the support material. Feature size performance and conductivity of PEDOT:PSS stripe regions are evaluated across a range of process conditions. Narrow PEDOT:PSS stripes produced using our technique range from 400 to 850 μm and exhibit conductivity approaching 1.5 S cm −1 . This electrical performance falls within the upper range expected prior to standard conductivity-enhancing post-treatments. Significantly, dewetting effects normally present with undoped PEDOT:PSS on the plastic substrate are fully mitigated with our deposition technique. These results indicate high ease of processing and good feature size performance, with few inherent drawbacks to the functional properties of the patterned films.

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A new wettability‐control technique for fabricating color OLED panels by an ink‐jet‐printing method

Cited by 3 publications

References 7 publications

Patterning of controllable surface wettability for printing techniques

Patterning of controllable surface wettability for printing techniques

A flexible, multifunctional, optoelectronic anticounterfeiting device from high-performance organic light-emitting paper

Scalable, Alternating Narrow Stripes of Polyvinyl Alcohol Support and Unmodified PEDOT:PSS with Maintained Conductivity Using a Single-Step Slot Die Coating Approach

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