A5036601537- Magnetic properties of thin films
- Magnetic Properties and Applications
- Magneto-Optical Properties and Applications
- Quantum and electron transport phenomena
- Surface and Thin Film Phenomena
- Semiconductor materials and devices
- Iron oxide chemistry and applications
- Characterization and Applications of Magnetic Nanoparticles
- Metallic Glasses and Amorphous Alloys
- Physics of Superconductivity and Magnetism
- Nanofabrication and Lithography Techniques
- Conducting polymers and applications
- Magnetic Properties and Synthesis of Ferrites
- Electromagnetic wave absorption materials
- Theoretical and Computational Physics
- ZnO doping and properties
- Metal and Thin Film Mechanics
- Advanced Antenna and Metasurface Technologies
- Copper Interconnects and Reliability
- Plasma Diagnostics and Applications
- Magnetic Properties of Alloys
- Nanomaterials for catalytic reactions
- Block Copolymer Self-Assembly
- Advanced Photocatalysis Techniques
- Magnetic Field Sensors Techniques
Chungnam National University
2016-2025
Seoul National University
2025
Daejeon University
2015-2020
PRG S&Tech (South Korea)
2018-2020
Government of the Republic of Korea
2018
Korea Advanced Institute of Science and Technology
1999-2014
Green Technology Center
2013
Tohoku University
2011
Materials Science & Engineering
2009
Andong National University
2009
We demonstrate high-performance polymer solar cells using the plasmonic effect of multipositional silica-coated silver nanoparticles. The location nanoparticles is critical for increasing light absorption and scattering via enhanced electric field distribution. device incorporating between hole transport layer active achieves a power conversion efficiency 8.92% with an external quantum 81.5%. These efficiencies are highest values reported to date metal
The surface plasmon effect on polymer solar cells and light-emitting diodes is demonstrated by using metal nanoparticles prepared from block copolymer templates. Light absorption of the thin layer increased with incorporation metallic nanostructures, resulting in a significant optoelectronic devices.
Spin-orbit coupling effect in structures with broken inversion symmetry, known as the Rashba effect, facilitates spin-orbit torques (SOTs) heavy metal/ferromagnet/oxide structures, along spin Hall effect. Electric-field control of is established for semiconductor interfaces, but it challenging involving metals owing to screening Here, we report that Pt/Co/AlOx laterally modulated by electric voltages, generating out-of-plane SOTs. This enables field-free switching perpendicular magnetization...
Highly uniform and dense, hexagonal noble metal nanoparticle arrays were achieved on large-area transparent glass substrates via scalable, parallel processing of block copolymer lithography. Exploring their localized surface plasmon resonance (LSPR) characteristics revealed that the Ag array displayed a UV-vis absorbance spectrum sufficiently narrow intense for biosensing application. A highly-sensitive, label-free detection prostate cancer specific antibody (anti-PSA) with sub-ng ml−1 level...
Highly efficient ITO-free polymeric electronic devices were successfully demonstrated by replacement of the ITO electrode with a solution-processed PEDOT:PSS containing Ag nanoparticles (NPs). Polymer solar cells (PSCs) and light emitting diodes (PLEDs) fabricated based on poly(5,6-bis(octyloxy)-4-(thiophen-2-yl)benzo[c][1,2,5]thiadiazole) (PTBT):PC61BM Super Yellow as photoactive layer, respectively. The surface plasmon resonance (SPR) effect improved electrical conductivity NPs clearly...
Abstract The utilization of ferromagnetic (FM) materials in thermoelectric devices allows one to have a simpler structure and/or independent control electric and thermal conductivities, which may further remove obstacles for this technology be realized. thermoelectricity FM/non-magnet (NM) heterostructures using an optical heating source is studied as function NM number multilayers. It observed that the overall signal those structures contributed by spin Seebeck effect anomalous Nernst (ANE)...
Organolead halide perovskite nanocrystals (NCs) have emerged as promising materials for various optoelectronic applications. However, their practical applications been limited due to low structural integrity and poor luminescence stability associated with fast attachment-detachment dynamics of surface capping molecules during postprocessing. At present, a framework understanding how the functional additives interact moieties organolead perovskites is not available. Methylammonium lead...
Abstract A controllable approach that combines surface plasmon resonance and two-dimensional (2D) graphene/MoS 2 heterojunction has not been implemented despite its potential for efficient photoelectrochemical (PEC) water splitting. In this study, plasmonic Ag-decorated 2D MoS nanosheets were vertically grown on graphene substrates in a practical large-scale manner through metalorganic chemical vapor deposition of thermal evaporation Ag. The yielded up to 10 times higher photo-to-dark...
Atomic layer etching (ALE), a cyclic process of surface modification and removal the modified layer, is an emerging damage-less technology for semiconductor fabrication with feature size less than 10 nm. Among plasma sources, inductively coupled (ICP) can be candidate ALE, but there lack research linking discharge physics to ALE process. In this study, we comprehensively investigated ICPs radio frequency (RF) bias Ar/C4F6 mixture considered Detailed studies on were conducted in each step...
A flexible piezoelectric composite is composed of a polymer matrix and ceramic fillers to achieve good mechanical flexibility processability. The overall performance largely determined by the filler inside. Thus, different dispersion methods additives that can promote ceramics optimal structures have been actively investigated. However, relatively few attempts made develop effectively contribute enhancement devices. In present work, we introduce fabrication devices Li-doped ZnO nanowires...
In the present work, gold (Au), silver (Ag), and copper (Cu) based mono- bimetallic NPs are prepared using a cost-effective facile wet chemical route. The pH for synthesis is optimized in accordance with optical spectra supported by finite difference time domain simulation studies. FESEM TEM micrographs used to analyze morphology of nanoparticles. images nanoparticles (BMPs) verified their nature. XRD studies confirmed formation fcc-structured NPs. Photoluminescence as-synthesized good...
In this study, we developed a method to qualify the plasma etching result in high-aspect-ratio trench with ion tilting using natural sheath curvature at wafer edge. Etching was performed patterned trenches composed of an amorphous carbon mask/SiO2/Si radio-frequency-biased inductively coupled Ar/C4F6 mixture. It is revealed that even slight tilt (1–2°) induces dramatic changes etch characteristics, such as etch-stop, asymmetric and vertical etching, which strongly depend on arrangement,...