A5080338996- GaN-based semiconductor devices and materials
- ZnO doping and properties
- Ga2O3 and related materials
- Advanced Photocatalysis Techniques
- Semiconductor materials and devices
- Semiconductor Quantum Structures and Devices
- Gas Sensing Nanomaterials and Sensors
- Copper-based nanomaterials and applications
- Quantum Dots Synthesis And Properties
- Metal and Thin Film Mechanics
- Nanowire Synthesis and Applications
- Chalcogenide Semiconductor Thin Films
- Perovskite Materials and Applications
- Electrocatalysts for Energy Conversion
- Photocathodes and Microchannel Plates
- Advanced Nanomaterials in Catalysis
- Gold and Silver Nanoparticles Synthesis and Applications
- Semiconductor materials and interfaces
- Thin-Film Transistor Technologies
- Carbon and Quantum Dots Applications
- Acoustic Wave Resonator Technologies
- Catalytic Processes in Materials Science
- Plasmonic and Surface Plasmon Research
- solar cell performance optimization
- Nanocluster Synthesis and Applications
Korea University
1998-2025
Korea Forest Service
2022-2024
Korea Institute of Science and Technology
2020-2024
Chonbuk National University Hospital
2007-2023
National University of Science and Technology
2016-2021
University of Florida
2009-2021
Institute of Forest Science
2021
Frumkin Institute of Physical Chemistry and Electrochemistry
2021
Institute for Theoretical and Experimental Physics
2021
Kurchatov Institute
2021
Au@Cu2O core–shell nanoparticles (NPs) were synthesized by a solution method at room temperature and applied for gas sensor applications. Transmission electron microscopy (TEM) images showed the formation of NPs, where 12–15 nm Au NPs covered with 60–30 Cu2O shell layers. The surface plasmon resonance (SPR) peak was red-shifted (520–598 nm) after formation. response higher than that bare to CO different temperatures concentrations. Similarly, NO2 low temperature. improved performance...
SnO2 recently has attracted particular attention as a powerful buffer layer for organic optoelectronic devices due to its outstanding properties such high electron mobility, suitable band alignment, and optical transparency. Here, we report on facile low-temperature solution-processed nanoparticles (NPs) in applications cathode (CBL) of inverted solar cells (iOSCs). The conduction energy NPs estimated by ultraviolet photoelectron spectroscopy was 4.01 eV, salient feature that is necessary an...
CoO/CoP heterostructure hollow-nanoneedles with interfacially strong P–Co–O tetrahedral coupling interaction effectively improve the activity and kinetics for overall water splitting.
This work evaluates the feasibility of alkaline hydrogen evolution reaction (HER) using Pt single-atoms (1.0 wt %) on defect-rich ceria (Pt
The development of high brightness, small pixel size, and self-emissive light-emitting diodes (LEDs) is deliberately accelerating to replace conventional organic/inorganic LED displays for the virtual/augmented reality market. In this study, we report fabrication process individually well-separated blue-light-emitting InGaN/GaN nanorod arrays on a large-scale wafer detach disperse them in acetone. dispersed individual LEDs are aligned horizontally onto interdigitated pattern with an...
We report on etch-induced damage in n-type GaN caused by an inductively coupled plasma, and recovery means of treatment with N2 plasma. As the plasma dc bias was increased increasing rf table power during etching, optical electrical properties etched films deteriorated as result damage. However, for samples effectively removed defects surface, leading to improved surface morphology, photoluminescence, ohmic contact GaN.
In this paper we provide explanations to the complex growth phenomena of GaN heteroepitaxy on nonpolar orientations using concept kinetic Wulff plots (or v-plots). Quantitative mapping in polar, semipolar, and angles are achieved a differential measurement technique from selective area growth. An accurate knowledge topography serves as an important stepping stone toward model-based control Examples illustrated correlate dynamics based with commonly observed features, including anisotropic...
Noble metal-based surface-enhanced Raman spectroscopy (SERS) has enabled the simple and efficient detection of trace-amount molecules via significant electromagnetic enhancements at hot spots. However, small cross-section various analytes forces use a reporter for specific surface functionalization, which is time-consuming limited to low-molecular-weight analytes. To tackle these issues, hybrid SERS substrate utilizing Ag as plasmonic structures GaN charge transfer enhancement centers...
We report a systematic study accomplished with series of undoped and Si-doped GaN epilayers grown on sapphire (0001) the carrier concentration 4.0×1017−1.6×1019 cm−3 in order to investigate evolution stress relaxation yellow luminescence by Si incorporation. As doping becomes higher, bound exciton peaks are gradually shifted lower energy due thermal residual linear coefficient ΔE/Δσ∥=42 meV/GPa. The present results show that both full width at half maximum double-crystal x-ray diffractometry...