A5100726320- Thin-Film Transistor Technologies
- Metamaterials and Metasurfaces Applications
- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Advancements in Battery Materials
- Advanced Sensor and Energy Harvesting Materials
- CCD and CMOS Imaging Sensors
- Terahertz technology and applications
- Advanced Memory and Neural Computing
- Energy Harvesting in Wireless Networks
- Advanced Battery Materials and Technologies
- Antenna Design and Analysis
- Conducting polymers and applications
- Transition Metal Oxide Nanomaterials
- Wireless Communication Networks Research
- Soil Moisture and Remote Sensing
- Silicon Nanostructures and Photoluminescence
- Silicon and Solar Cell Technologies
- Satellite Communication Systems
- Advanced Battery Technologies Research
- Plasmonic and Surface Plasmon Research
- Microwave Engineering and Waveguides
- Ferroelectric and Negative Capacitance Devices
- Semiconductor materials and devices
- Millimeter-Wave Propagation and Modeling
Soongsil University
2016-2025
Konkuk University Medical Center
2025
Materials Science & Engineering
2025
Sejong University
2017-2024
Korea Advanced Institute of Science and Technology
2024
University of Ulsan
2023
Yonsei University
2018-2022
Ajou University
2022
Convergence
2020-2022
Yokkaichi University
2012-2021
Abstract Electromagnetically induced transparency (EIT) analogs using metamaterials have diverse applications, including nonlinear optics, telecommunications, and biochemical sensors. These EIT can be actively controlled by embedding semiconducting materials into metamaterial structures, but most active require complex optical setups complicated fabrication processes. Graphene‐based are some of the promising systems because their simple controllability electrical bias, related researches so...
Abstract Nanocomposites based on biomaterials are promising candidates for emerging green‐ electronics benefiting from environment‐friendly, renewable, biocompatible, and biodegradable resources sustainable research development. Especially, the application of biocomposites‐based memristor simulating artificial synapses called bio‐memristor has further facilitated progress ecologically benign bioelectronics. In this study, authors present that environment‐friendly nanocomposites films,...
Abstract Recent advances in mass transfer technology are expected to bring next‐generation micro light‐emitting diodes (µLED) displays into reality, although reliable integration of the active‐matrix backplane with transferred µLEDs remains as a challenge. Here, µLED display is innovated by demonstrating pixel circuit‐integrated micro‐LEDs (PIMLEDs) and integrating them onto transparent glass substrate. The PIMLED comprises low‐temperature poly‐silicon transistors GaN µLED. square‐shaped...
A new series of heterocyclic oligomers based on the 1,3,4-oxadiazole ring were synthesized. Other electron-deficient cores (fluorenone and fumaronitrile) introduced to investigate as n-channel materials. The physical properties, thin film morphologies, field-effect transistor characteristics evaluated. Thin films deposited at different substrate temperatures variously coated Si/SiO(2) for device optimization. Contrary our expectations, devices 4 revealed p-channel behavior, average hole...
Abstract Active control of metamaterial properties is critical for advanced terahertz (THz) applications. However, the tunability THz properties, such as resonance frequency and phase wave, remains challenging. Here, a new device design provided extensively tuning metamaterials. Unlike previous approaches, intended to electrical interconnections between metallic unit structures This strategy referred molecularization meta‐atoms accomplished by placing graphene bridges whose conductivity...
Understanding the mutual interaction between electronic excitations and lattice vibrations is key for understanding transport optoelectronic phenomena. Dynamic manipulation of such elusive because it requires varying material composition on atomic level. In turn, recent studies topological insulators (TIs) have revealed coexistence a strong phonon resonance topologically protected Dirac plasmon, both in terahertz (THz) frequency range. Here, using these intrinsic characteristics TIs, we...
In this paper, we propose a polarization-selective color filter that can generate two different informations simultaneously depending on the polarization direction. The proposed is mainly composed of etalon structure to by structural resonance properties while upper layer made plasmonic nanogratings promote polarization-dependent properties. When duty ratio silver fixed, maintain identical optical for orthogonal polarization, manipulate information cavity height horizontal polarization....
Abstract Hafnium oxides‐based ferroelectric materials are promising for applications in nonvolatile memory devices. To control the ferroelectricity of such materials, it is necessary to tune their polymorphism, interfacial features, and defect (oxygen vacancy) distribution. A strategy described enhancing properties polycrystalline hafnium zirconium oxide (HZO) ultrathin films by modifying oxygen pressure during device preparation stage, which involves thermal annealing TiN electrodes that...
Soft robotics systems are currently under development using ionic electroactive polymers (i-EAP) as soft actuators for the human-machine interface. However, this endeavor has been impeded by dilemma of reconciling competing demands force and strain in i-EAP actuators. Here, authors present a novel design called "ions-silica percolated dielectric elastomer (i-SPIDER)", which exhibits liquid-confined silica microstructures that effectively resolve chronic issue conventional The i-SPIDER...
In this paper, we propose a novel voltage programmed pixel circuit based on amorphous-indium-gallium-zinc-oxide thin-film transistors (a-IGZO TFTs) for active-matrix organic light-emitting displays. Through the extensive simulation work a-IGZO TFT and OLED models, confirm that proposed can compensate threshold variations of TFTs degradation over wide dynamic range (~104) current as well achieve high aperture ratio with suppressed error rate below 9%.
The paper presents a wearable textile antenna embroidered on fabric for wireless power transfer systems. A planar spiral coil was generated with the conductive thread cotton substrate, and connected to rectifier circuit fabricated flexible polyethylene terephthalate film constitute bendable receiver by magnetic resonance. At resonance frequency of 6.78 MHz, proposed system could achieve −5.51 dB efficiency 12.75 mW transmission at distance 15 cm. It also demonstrated that transmitted be...
Abstract Chiral metamaterials comprise a promising platform for advanced optoelectronic and biomedical applications. However, conventional fabrication via lithography is limited by its complexity high cost. Herein, the lithography‐free of terahertz chiral their enhancement sensing chirality biocrystal enantiomers presented. Au microstrip patterns (CHAMs) in saw‐tooth shape are fabricated combining two‐step buckling processes glancing‐angle deposition. Non‐superimposable geometric achieved...
Robust ferroelectricity in HfO
In this paper, we propose a novel timing estimation method for orthogonal frequency division multiplexing (OFDM) systems. The most common approaches in estimating use correlation by using given preamble. Thus, the performance is directly dependent on specific preamble type. proposed algorithm estimates simple circular shift operation of at receiver. For reason, can be used any OFDM systems regardless their structures. simulation results investigated paper reveal that remarkably increases...
In this paper, we present an operational amplifier (op-amp) and a pulsewidth-modulation (PWM) controller fabricated with amorphous indium-gallium-zinc oxide thin-film transistors (a-InGaZnO TFTs), to build adaptive dc-dc converter for display driving systems. The a-InGaZnO TFT presents electrical characteristics suitable accomplishing op-amp composed only n-type TFTs have overall gain of 24.5 dB, cutoff frequency 6 kHz, unit 32 kHz operating at ±15 V. is used construct comparator error on...
Abstract A universal method that enables utilization of conventional photolithography for processing a variety polymer semiconductors is developed. The relies on imparting chemical and physical orthogonality to film via formation semi‐interpenetrating diphasic network with bridged polysilsesquioxane structure, which termed an orthogonal semiconductor gel. synthesized gel films remain tolerant various etching processes involved in photolithography, thereby facilitating fabrication...
Ultrahigh-resolution patterning with high-throughput and high-fidelity is highly in demand for expanding the potential of organic light-emitting diodes (OLEDs) from mobile TV displays into near-to-eye microdisplays. However, current techniques so far suffer low resolution, consecutive pattern RGB pixelation, fidelity, throughput issue. Here, we present a silicone engineered anisotropic lithography semiconductor (OLES) that in-situ forms non-volatile etch-blocking layer during reactive ion...