Direct Writing Micropatterns with a Resolution up to 1 µm

Zhang, Kejie; Hu, Binbin; Zhang, Min; Meng, Lili; Liu, Huan

doi:10.1002/adfm.201907907

Cited by 8 publications

(4 citation statements)

References 34 publications

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“…The as‐developed UHT‐FE exhibits a rather good spatial electric uniformity with a standard deviation of merely 3.1, by measuring the sheet resistance values in 9 local regions in an area of 3 × 3 cm 2 (Figure 1g,h). As we previously reported, [ 36 ] the unit of triple conical fibers (tri‐CFs, Figure S1, Supporting Information) has the capacity of the steady and continuous transferring liquid onto the target substrate in a controllable way. By moving the tri‐CFs unit directionally along the direction parallels with the L direction (WD⫽L), the high‐resolution and highly‐aligned AgNWs micro‐lines crossing‐network (HRHA‐CA‐AgNWs) can be directly written on the target substrate with the width resolution of AgNWs micro‐lines depending on the vertical height (H) (Figure 1i, Figure S2, Supporting Information).…”

Section: Resultsmentioning

confidence: 81%

An Ultra‐High Transparent Electrode via a Unique Micro‐Patterned AgNWs Crossing‐Network with 3.9% Coverage: Toward Highly‐Transparent Flexible QLEDs

Zhang,

Meng,

Zhang

et al. 2023

Adv Funct Materials

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Micro‐patterning silver nanowires (AgNWs) via solution processes is vital in making high‐performance transparent flexible electrodes (TFE) that have been widely used in optoelectronic devices. However, it has suffered from the limitation of a trade‐off relationship between the coverage and the arrangement of AgNWs, which determine the transparency and the conductivity, respectively. Here, unique AgNWs micro‐patterns, featuring as the crossing‐grid of high‐resolution and highly‐aligned AgNWs micro‐lines, which enable the micro‐pattern highly cross‐aligned with a limited 3.9% coverage, are developed. Consequently, a TFE with an ultra‐high transmittance over 98.5% and a sheet resistance of 25.5 Ω sq−1 is developed. Guided by the unit of triple conical fibers, AgNWs are controllable transferred onto the target area, leaving a line with a width‐resolution up to 2 µm. Simultaneously, AgNWs are aligned under the synergistic effect of both the solution‐shearing and the tri‐phase contact line confinement. Using the as‐developed TFE as either the top or the bottom electrode, a transparent quantum dot light‐emitting diode (T‐QLED) with a transmittance of 89.8%, as well as a flexible T‐QLED with a transmittance of 92.8% are demonstrated, much higher than those of T‐QLEDs reported. It is envisioned that the result would inspire the fabrication of high‐performance transparent optoelectronic devices.

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Section: Resultsmentioning

confidence: 81%

An Ultra‐High Transparent Electrode via a Unique Micro‐Patterned AgNWs Crossing‐Network with 3.9% Coverage: Toward Highly‐Transparent Flexible QLEDs

Zhang,

Meng,

Zhang

et al. 2023

Adv Funct Materials

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“…To date, various solution processes have been developed for preparation of QD patterned arrays, such as inkjet printing, − film lithography, − transfer printing, − blade coating with a mask, , Chinese brush, fiber array printing, electrodeposition, Langmuir–Blodgett (LB) printing, electrospinning, hydrophilic mask, and others . These methods, however, still have some drawbacks that need to be addressed, such as complex instruments, high costs, single patterns, and low resolution.…”

Section: Introductionmentioning

confidence: 99%

CdSe/ZnS Quantum Dot Patterned Arrays for Full-Color Light-Emitting Diodes in Active-Matrix QLED Display

Li,

Sun,

Zhang

et al. 2024

ACS Appl. Nano Mater.

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Quantum dot light-emitting diodes (QLEDs) are increasingly being recognized as next-generation display technology, owing to their wide color gamut, high saturation levels, and low energy consumption. However, the primary challenge in QLED display fabrication lies in precisely depositing these inorganic quantum dot (QD) nanoparticles over a large area multiple times. Nowadays, solution processes such as inkjet printing and screen printing have been employed to address these challenges; however, they still have some trade-offs between multicolor deposition, precise spatial arrangement, and equipment cost. Here, the precise assembly of multiple QD patterned arrays on one target substrate was achieved using an asymmetric wettability interface assembly (AWIA) template, resulting in a high-pixel resolution and full-color QLED device. The asymmetric wettability interface between the top and bottom of the silicon pillar on the template allows for precise splitting and pinning of a continuous liquid film, facilitating further assembly of QD pattern arrays. Additionally, the multicolor and multishape QD pattern array was created through QD surface modification (orthogonal solvent protection) and dislocation pinning processes (reducing dissolution time) during the repetition process. Consequently, high-resolution (each pixel ≈ 10 μm; PPI ≈ 1278) full-color (yellow, cyan, violet, and white) QLED devices were fabricated efficiently. This approach offers a perspective for assembling multiple micropatterned arrays for high-resolution electronic devices.

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“…Electrically conductive electrodes are indispensable for all types of electronic devices, ranging from interconnects to passive elements to functional and integrated devices, − and thus the deposition of conductive materials into elaborate patterns via DIW is fundamental yet crucial. In terms of raw materials, metals are more favorable for DIW than carbon-based materials or conducting polymers due to their intrinsically high conductivity and lower cost .…”

Section: Introductionmentioning

confidence: 99%

Direct Writing of Silver Nanowire Patterns with Line Width down to 50 μm and Ultrahigh Conductivity

Kong

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Direct writing of one-dimensional nanomaterials with large aspect ratios into customized, highly conductive, and high-resolution patterns is a challenging task. In this work, thin silver nanowires (AgNWs) with a length-to-diameter ratio of 730 are employed as a representative example to demonstrate a potent direct ink writing (DIW) strategy, in which aqueous inks using a natural polymer, sodium alginate, as the thickening agent can be easily patterned with arbitrary geometries and controllable structural features on a variety of planar substrates. With the aid of a quick spray-and-dry postprinting treatment at room temperature, the electrical conductivity and substrate adhesion of the written AgNWs-patterns improve simultaneously. This simple, environment benign, and low-temperature DIW strategy is effective for depositing AgNWs into patterns that are high-resolution (with line width down to 50 μm), highly conductive (up to 1.26 × 10 5 S/ cm), and mechanically robust and have a large alignment order of NWs, regardless of the substrate's hardness, smoothness, and hydrophilicity. Soft electroadhesion grippers utilizing as-manufactured interdigitated AgNWs-electrodes exhibit an increased shear adhesion force of up to 15.5 kPa at a driving voltage of 3 kV, indicating the strategy is very promising for the decentralized and customized manufacturing of soft electrodes for future soft electronics and robotics.

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Direct Writing Micropatterns with a Resolution up to 1 µm

Cited by 8 publications

References 34 publications

An Ultra‐High Transparent Electrode via a Unique Micro‐Patterned AgNWs Crossing‐Network with 3.9% Coverage: Toward Highly‐Transparent Flexible QLEDs

An Ultra‐High Transparent Electrode via a Unique Micro‐Patterned AgNWs Crossing‐Network with 3.9% Coverage: Toward Highly‐Transparent Flexible QLEDs

CdSe/ZnS Quantum Dot Patterned Arrays for Full-Color Light-Emitting Diodes in Active-Matrix QLED Display

Direct Writing of Silver Nanowire Patterns with Line Width down to 50 μm and Ultrahigh Conductivity

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