Enhancement of electrical conductivity during the femtosecond laser trimming process for OLED repair

Ahn, Sanghoon; Kim, Jihyun; Lee, Dongkeun; Park, Changkyoo; Zander, Christian; Ji, Seok-Young; Chang, Won Seok

doi:10.1016/j.optlaseng.2020.106381

Cited by 7 publications

(2 citation statements)

References 10 publications

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“…It might enhance the wear resistance of the material [31,32] , leading to a reliable surface treatment without contamination of the material [33] . In particular, femtosecond laser (10 − 15 s) has extremely short pulse widths, high peak powers, and minimal thermal impact on the surrounding area during processing-enabling cold processing [34] , unchanged crystal phase, neat processing edge, and precise processing [35] . Pan et al [36] found that microstructure processing on the surface of Ti6Al4V titanium alloy by using a femtosecond laser can reduce its coe cient of friction (COF) and wear mass loss by 68.9% and 90%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Texturing the optimal wear-resistance micro/nano hierarchical structure for drug loading on titanium implants

Yang

Yanfang

Zhou

et al. 2023

Preprint

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This paper aimed to texture a drug-loaded structure on the surface of the titanium implant. Firstly, ABAQUS software was used to construct the implant placement model and to calculate the imposed forces on the implant during placement. Then the femtosecond laser-machined microstructures were subjected to friction testing to select the most wear-resistant shape, and the structural parameters of the shape were optimized. A micro/nano hierarchical structure was developed on the surface of the titanium disc and commercial implant through anodization. The morphology and tribological properties were studied precisely. The results show that laser-textured dimple shapes reduced the contact area and stored wear debris, improving the wear resistance of the surface. The shape with a diameter of 150 μm, depth of 80 μm, and texture density of 5% exhibited high resistance against wear during implant insertion. In-vitro study using fresh porcine mandibles showed that TiO2 nanotubes inside the dimples remain intact after implant placement. In addition, the micro/nano hierarchical structure exhibited excellent wettability, promising for drug loading. The designed drug-loaded structure protects the original surface of the implant, which can safeguard the surface modifications of all commercial implants used clinically currently. The presented approach can improve the implant success rate in patients with bone metabolic clinical conditions.

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Section: Introductionmentioning

confidence: 99%

Texturing the optimal wear-resistance micro/nano hierarchical structure for drug loading on titanium implants

Yang

Yanfang

Zhou

et al. 2023

Preprint

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“…For AgNW electrodes to be used as electrodes for deformable displays such as OLED and micro-LED display, high-resolution patterning must be possible because high image resolution should be obtained under mechanical deformation. − A large number of studies have been reported for the fine patterning of AgNW electrodes, which includes photolithography using photoresists, poly(dimethylsiloxane) (PDMS) stamps, lasers, and insulator printing methods. − Photolithography is a widespread method for the fine and precise patterning of AgNW electrodes. Much effort has been made to reduce its use in the actual process because photolithography is expensive and cumbersome at the same time. − Laser patterning is efficient because it can make patterns directly in one step without any use of photomasks or chemical etching processes, but it has the disadvantage of requiring expensive equipment and slow production speed.…”

Section: Introductionmentioning

confidence: 99%

Embedded Reverse-Offset Printing of Silver Nanowires and Its Application to Double-Stacked Transparent Electrodes with Microscale Patterns

Kim

Won

Seo

et al. 2021

ACS Appl. Mater. Interfaces

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We propose an embedded reverse-offset printing (EROP) method, which generates silver nanowire (AgNW) transparent electrodes for display applications. The proposed EROP method can solve the two critical issues of microscale pattern formation and surface planarization. The AgNW electrode had a transmittance of 82% at 550 nm, a sheet resistance of 12.2 Ω/sq, and a 3.27 nm smooth surface. We realized the roll-based pattern formation of AgNW on a plastic substrate as small as 10 μm with negligible step differences to facilitate the proposed method. The proposed EROP method also produced a double-stacked AgNW electrode, enabling the simultaneous operation of separately micropatterned devices. To verify the usefulness of EROP, we fabricated an organic light-emitting diode (OLED) device to demonstrate leakage current reduction and efficiency improvement compared with a conventional indium tin oxide (ITO)-based OLED device. The EROP-based OLED showed 38 and 25% higher current efficiencies than an insulator-patterned AgNW OLED and a conventional ITO-based OLED, respectively.

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Fundamental study on the construction of anti-wear drug delivery system through the design of titanium surface morphology

Ding,

Zhang,

Hou

et al. 2024

Journal of Materials Science & Technology

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Enhancement of electrical conductivity during the femtosecond laser trimming process for OLED repair

Cited by 7 publications

References 10 publications

Texturing the optimal wear-resistance micro/nano hierarchical structure for drug loading on titanium implants

Texturing the optimal wear-resistance micro/nano hierarchical structure for drug loading on titanium implants

Embedded Reverse-Offset Printing of Silver Nanowires and Its Application to Double-Stacked Transparent Electrodes with Microscale Patterns

Fundamental study on the construction of anti-wear drug delivery system through the design of titanium surface morphology

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