High‐Rate Nanoscale Offset Printing Process Using Directed Assembly and Transfer of Nanomaterials

Cho, Hanchul; Sivasubramanian, S.; Lee, Jin Young; Jeong, Hyoungsun; Busnaina, Ahmed

doi:10.1002/adma.201404769

Cited by 20 publications

(27 citation statements)

References 64 publications

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“…When the EML ink is dropped onto the bank and the microchannels of the donor substrate, the surface energy of SiO 2 must be sufficiently reduced to prevent the ink from being deposited on the bank, which is made of SiO 2 . A self-assembled monolayer (SAM) and a postsurface treatment can selectively reduce the surface energy . We used octadecyltrichlorosilane (OTS) selectively to make the surface energy of the bank low without affecting the surface energy of Cr.…”

Section: Resultsmentioning

confidence: 99%

Solution and Evaporation Hybrid Approach to Enhance the Stability and Pattern Resolution Characteristics of Organic Light-Emitting Diodes

Cho

Lee

Jeong

et al. 2020

ACS Appl. Mater. Interfaces

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The solution process and vacuum evaporation, both fabrication methods for conventional organic light-emitting diodes (OLEDs), are intrinsically restricted with regard to their ability to enhance pattern resolutions and film stability outcomes. Here, we introduce a novel approach of the solution process followed by intense pulsed light (IPL) evaporation for producing high-resolution line patterns of OLEDs. Through control of the wettability between the banks and microchannels via a mask-free selective surface treatment, we successfully deposited phosphorescent green and red inks only into the microchannels. Then, high-resolution patterns of an emitting layer (EML) layer were uniformly evaporated onto the device substrate using IPL evaporation. Ultimately, we fabricated green and red phosphorescent OLED devices with a high pixel density of a line-patterned EML with a width of 6 μm and a pitch of 13.6 μm. In addition, we demonstrated that the IPL-evaporated films have many advantages compared to those fabricated by the conventional solution process. We also showed that the IPL evaporation process can be less sensitive to problems related to the aggregation of organic molecules during a drying or annealing process. Hence, the device performance and lifetime of the IPL-evaporated OLEDs were enhanced compared to those of the spin-coated OLEDs.

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Section: Resultsmentioning

confidence: 99%

Solution and Evaporation Hybrid Approach to Enhance the Stability and Pattern Resolution Characteristics of Organic Light-Emitting Diodes

Cho

Lee

Jeong

et al. 2020

ACS Appl. Mater. Interfaces

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“…[443] This Nanoscale Offset Printing System (NanoOPS) is based on directed assembly and transfer of nanoparticles. [444] To begin the process, a reusable damascene template is created out of either flexible or rigid materials.…”

Section: Advantages and Disadvantages Of Printing Methodsmentioning

confidence: 99%

Manufacturing Technology (MATES) II. Task Order 0006: Air Force Technology and Industrial Base Research Sub-Task 07: Future Advances in Electronic Materials and Processes-Flexible Hybrid Electronics

Medina¹,

Schneider²,

Temmesfeld³

et al. 2016

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“…[110h] Busnaina et al reintroduced electrophoretic assembly into the technique to increase the deposition speed, so CNTs deposit into the desired patterns within minutes for whole substrates; creating a nanoscale offset printing process (Figure 6f). [142] They made a reusable "Damascene" template of metal electrodes in the desired pattern, with an insulating SiO 2 as the nonpatterned background. They placed the template in an aqueous SWCNT dispersion and then withdrew the template while applying a bias.…”

Section: Template Patterningmentioning

confidence: 99%

Nanoscale Patterning of Carbon Nanotubes: Techniques, Applications, and Future

Corletto

Shapter

2020

Advanced Science

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Carbon nanotube (CNT) devices and electronics are achieving maturity and directly competing or surpassing devices that use conventional materials. CNTs have demonstrated ballistic conduction, minimal scaling effects, high current capacity, low power requirements, and excellent optical/photonic properties; making them the ideal candidate for a new material to replace conventional materials in next-generation electronic and photonic systems. CNTs also demonstrate high stability and flexibility, allowing them to be used in flexible, printable, and/or biocompatible electronics. However, a major challenge to fully commercialize these devices is the scalable placement of CNTs into desired micro/nanopatterns and architectures to translate the superior properties of CNTs into macroscale devices. Precise and high throughput patterning becomes increasingly difficult at nanoscale resolution, but it is essential to fully realize the benefits of CNTs. The relatively long, high aspect ratio structures of CNTs must be preserved to maintain their functionalities, consequently making them more difficult to pattern than conventional materials like metals and polymers. This review comprehensively explores the recent development of innovative CNT patterning techniques with nanoscale lateral resolution. Each technique is critically analyzed and applications for the nanoscale-resolution approaches are demonstrated. Promising techniques and the challenges ahead for future devices and applications are discussed.

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High‐Rate Nanoscale Offset Printing Process Using Directed Assembly and Transfer of Nanomaterials

Cited by 20 publications

References 64 publications

Solution and Evaporation Hybrid Approach to Enhance the Stability and Pattern Resolution Characteristics of Organic Light-Emitting Diodes

Solution and Evaporation Hybrid Approach to Enhance the Stability and Pattern Resolution Characteristics of Organic Light-Emitting Diodes

Manufacturing Technology (MATES) II. Task Order 0006: Air Force Technology and Industrial Base Research Sub-Task 07: Future Advances in Electronic Materials and Processes-Flexible Hybrid Electronics

Nanoscale Patterning of Carbon Nanotubes: Techniques, Applications, and Future

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