A5100416603- Thin-Film Transistor Technologies
- Semiconductor materials and devices
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- ZnO doping and properties
- Advanced Sensor and Energy Harvesting Materials
- Robotic Locomotion and Control
- Maritime Ports and Logistics
- Ferroelectric and Negative Capacitance Devices
- Advanced Memory and Neural Computing
- Modular Robots and Swarm Intelligence
- Organic Light-Emitting Diodes Research
- Photonic and Optical Devices
- Virtual Reality Applications and Impacts
- Tactile and Sensory Interactions
- Nanomaterials and Printing Technologies
- Soft Robotics and Applications
- Advanced Optical Imaging Technologies
- Perovskite Materials and Applications
- Nanowire Synthesis and Applications
- Phase-change materials and chalcogenides
- Teleoperation and Haptic Systems
- Muscle activation and electromyography studies
- Photonic Crystals and Applications
- Structural Behavior of Reinforced Concrete
Konkuk University
2014-2025
Sungkyunkwan University
2006-2025
Samsung Medical Center
2002-2025
Korea Advanced Institute of Science and Technology
1997-2025
Samsung (South Korea)
2012-2024
Pohang University of Science and Technology
2000-2024
Inha University
2006-2024
Korea Environment Institute
2024
Yonsei University
2010-2024
Hanyang University
2022-2024
Field-effect transistors based on single crystals of organic semiconductors have the highest reported charge carrier mobility among materials, demonstrating great potential for electronic applications. However, single-crystal devices are difficult to fabricate. One biggest challenges is prepare dense arrays over large-area substrates with controlled alignment. Here, we describe a solution processing method grow large aligned C(60) crystals. Our well-aligned needles and ribbons show electron...
Transparent flexible charge-generating piezoelectric nanodevices are developed. The resulting integrated nanodevice generates a noticeable current when it is pushed by application of an external load. Piezoelectric ZnO nanorod-based with embossed PdAu top electrodes produce the highest output density approximately 10 μA cm−2 at load 0.9 kgf.
A low-power flexible organic light-emitting diode (OLED) display device based on low temperature color filters with a thin film encapsulated RGB OLED microcavity is achieved high contrast ratios (up to 150 000:1 in dark ambient) and power consumption (34% saving compared polarization film). Furthermore, mechanical 10 000 times folding experiment radius of 1 mm demonstrates the reliability device.
Thin-film color reflectors inspired by Morpho butterflies are fabricated. Using a combination of directional deposition, silica microspheres with wide size distribution, and PDMS (polydimethylsiloxane) encasing, large, flexible reflector is created that actually provides better angle-independent characteristics than which can even be bent folded freely without losing its Morpho-mimetic photonic properties. Detailed facts importance to specialist readers published as "Supporting Information"....
Fully rollable transparent nanogenerators have been developed using chemical vapor deposition-grown large-scale graphene sheets as electrodes and piezoelectric ZnO-nanorod arrays. The electrical structural stability of the with excellent charge scavenging performance under external mechanical loads such bending rolling shows that graphene-based are suitable for self-powered device applications. Detailed facts importance to specialist readers published "Supporting Information". Such documents...
Mechanically durable stretchable trans-istors are fabricated using carbon nanotube electrical components and tough thermoplastic elastomers. After an initial conditioning step, the characteristics remain constant with strain. The strain-dependent similar in orthogonal stretching directions. Devices can be impacted a hammer punctured needle while remaining functional stretchable.
It is essential to control the electronic structure of graphene in order apply films for use electrodes. We have introduced chemical dopants that modulate properties few-layer synthesized by vapor deposition. The work function, sheet carrier density, mobility, and resistance these were systematically modulated reduction potential values dopants. further demonstrated power generation a nanogenerator was strongly influenced choice electrode with modified function. off-current well quenched...
Recent trials have shown that intravascular imaging (IVI)-guided percutaneous coronary intervention (PCI) improves clinical outcome, as compared to angiography-guided PCI, in complex artery lesions. However, it is unclear whether this benefit affected by overall lesion complexity each patient. The present study sought investigate the impact of on IVI-guided PCI. A total 4,611 patients with lesions from RENOVATE-COMPLEX-PCI trial (n=1,639) and institutional registry Samsung Medical Center...
The fabrication process and the characteristics of bottom-gate Ga <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> -In -ZnO (GIZO) thin-film transistors (TFTs) are reported in detail. Experimental results show that oxygen supply during deposition GIZO active layer silicon oxide passivation controls threshold voltage TFT. field-effect mobility TFT fabricated under optimum conditions 2.6...
The ability to control the molecular organization of electronically active liquid-crystalline polymer semiconductors on surfaces provides opportunities develop easy-to-process yet highly ordered supramolecular systems and, in particular, optimize their electrical and environmental reliability applications field large-area printed electronics photovoltaics. Understanding relationship between nanostructure stability appropriate is key enhancing performance organic field-effect transistors...
This letter examines the effect of gate dielectric material on light-induced bias-temperature instability an In–Ga–Zn–O (IGZO) thin-film transistor (TFT). After applying positive and negative bias stresses, <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$\hbox{SiN}_{x}$</tex></formula> -gated TFT exhibited inferior stability to Notation="TeX">$\hbox{SiO}_{2}$</tex></formula> TFT, which was explained...
The friction of graphene on various substrates, such as SiO2, h-BN, bulk-like graphene, and mica, was investigated to characterize the adhesion level between underlying surface. SiO2 decreased with increasing thickness converged around penta-layers due incomplete contact two surfaces. However, an atomically flat substrate, h-BN or low comparable that graphene. In contrast, folded onto indistinguishable from mono-layer despite ultra-smoothness characterization graphene's roughness before...
An electrically tunable photonic crystal is developed utilizing crystalline colloidal arrays of high refractive index particles. Through modulation the particle, and applied electric field, both bandwidth position bandgap could be tuned. Full color with optical quality achieved, which paves a way to develop novel reflective display.
Metamaterials are effectively homogeneous materials that display extraordinary dispersion. Negative index metamaterials, zero metamaterials and extremely anisotropic just a few examples. Instead of using locally resonating elements may cause undesirable absorption, there huge efforts to seek alternative routes obtain these unusual properties. Here, we demonstrate an approach for constructing with extreme dispersion by simply coiling up space curled channels. Such geometric also has advantage...
Ultra-definition, large-area displays with three-dimensional visual effects represent megatrend in the current/future display industry. On hardware level, such a "dream" requires faster pixel switching and higher driving current, which turn necessitate thin-film transistors (TFTs) high mobility. Amorphous oxide semiconductors (AOS) as In-Ga-Zn-O are poised to enable TFTs, but trade-off between device performance stability under illumination critically limits their usability, is related...
We have fabricated high-performance and high-stability sol-gel-processed MgInZnO thin films transistors with varying Mg content. As the content was increased, turn-on-voltage increased off-current decreased. This is because incorporation of (with low standard electrode potential high optical band gap, Eopt, when oxidized) causes reduction in oxygen vacancy, acting as a carrier source, an increase Eopt film. results concentration Small grains smooth morphology by lead to improvement mobility,...