A5068908992- Semiconductor materials and devices
- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Copper Interconnects and Reliability
- Metal and Thin Film Mechanics
- Catalytic Processes in Materials Science
- Diamond and Carbon-based Materials Research
- Thin-Film Transistor Technologies
- Advanced Photocatalysis Techniques
- Conducting polymers and applications
- TiO2 Photocatalysis and Solar Cells
- Silicon Carbide Semiconductor Technologies
- Transition Metal Oxide Nanomaterials
- Surface Modification and Superhydrophobicity
- Advanced Sensor and Energy Harvesting Materials
- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Ga2O3 and related materials
- Copper-based nanomaterials and applications
- Quantum Dots Synthesis And Properties
- Boron and Carbon Nanomaterials Research
- GaN-based semiconductor devices and materials
- Nanofabrication and Lithography Techniques
- Nanowire Synthesis and Applications
Sungkyunkwan University
2016-2025
Seoul National University
2024
University of California, Riverside
2009
Kwangshin University
2002-2003
In-Q-Tel
2002
Cornell University
1996-1999
Korea Research Institute of Chemical Technology
1995-1997
Kyoto University
1997
University of Bonn
1996
We developed a method to use NH2-functionalized polymer films align and immobilize DNA molecules on Si substrate. The plasma-polymerized cyclohexane film was deposited the substrate according radio frequency plasma-enhanced chemical vapor deposition using single molecular precursor, it then treated by dielectric barrier discharge in nitrogen environment under atmospheric pressure. Changes chemistry of surface functional groups were studied X-ray photoelectron spectroscopy Fourier transformed...
Over the past number of years, power conversion efficiency perovskite solar cells has remained at 25.5%, reflecting a respectable result for general incorporation organometallic trihalide cells. However, still suffer from long-term stability issues. Perovskite decomposes upon exposure to moisture, thermal, and UV-A light. Studies related this context have ongoing. Recently, research was mainly conducted on against non-radiative recombination. This study improved critical instability in...
In this research, ZnO nanoparticles were synthesized by spray-pyrolysis method using the zinc acetate dihydrate as starting material at synthesis temperature of 900°C with various concentrations (0.01, 0.1, 1.0 M, respectively). The physico-chemical property was characterized XRD, SEM, FT-IR, and UV-vis spectroscopy. indicated particle size two-type shape. With increased precursor concentration, shown not only increasing from 0.8 to 1.5 μm primary particles but also similar tendency (15 35...
Using confocal microscopy, we have studied the morphology of polymer dispersed liquid crystals (PDLC) as a function polymer/liquid crystal composition, cure temperature, and ultraviolet (UV) curing power determined how this affects electro-optical properties. The PDLC consists spongelike texture where spherically shaped crystalline domains are in matrix. These grow fraction increases UV decreases. We observe no significant changes domain size with temperature. Instead, high-temperature cures...
Transparent conducting undoped and Al impurity doped ZnO films were deposited on glass substrate by spin coat technique using 24 days aged precursor solution with of ethanol diethanolamine. The characterized UV-Visible spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM), electrical resistivity (<TEX>$\rho$</TEX>), carrier concentration (n), hall mobility (<TEX>$\mu$</TEX>) measurements. XRD data show that the film shows polycrystalline nature hexagonal wurtzite...
This paper presents the preparation of high-quality vanadium dioxide (VO2) thermochromic thin films with enhanced visible transmittance (Tvis) via radio frequency (RF) sputtering and plasma chemical vapor deposition (PECVD). VO2 high Tvis excellent optical switching efficiency (Eos) were successfully prepared by employing SiO2 as a passivation layer. After deposition, roughness was decreased 2-fold denser structure formed. These morphological changes corresponded to results characterization...