A5060093917- ZnO doping and properties
- Copper-based nanomaterials and applications
- Semiconductor materials and devices
- Nanomaterials and Printing Technologies
- Quantum Dots Synthesis And Properties
- Organic Electronics and Photovoltaics
- Gas Sensing Nanomaterials and Sensors
- GaN-based semiconductor devices and materials
- Organic Light-Emitting Diodes Research
- Chalcogenide Semiconductor Thin Films
- Semiconductor materials and interfaces
- Ga2O3 and related materials
- Perovskite Materials and Applications
- Advanced Sensor and Energy Harvesting Materials
- Gold and Silver Nanoparticles Synthesis and Applications
- Conducting polymers and applications
- Luminescence and Fluorescent Materials
- nanoparticles nucleation surface interactions
- Metal and Thin Film Mechanics
- Nanowire Synthesis and Applications
- Thin-Film Transistor Technologies
- Electronic and Structural Properties of Oxides
- Catalytic Processes in Materials Science
- Transition Metal Oxide Nanomaterials
- Copper Interconnects and Reliability
Korea Basic Science Institute
2015-2024
Samsung Medical Center
2021
Sungkyunkwan University
2021
Government of the Republic of Korea
2019
Pusan National University
2012
Kyungpook National University
2005-2009
An effective method for depositing highly transparent and conductive ultrathin silver (Ag) electrodes using minimal oxidation is reported. The of Ag layers significantly improves the intrinsic optical structural properties without any degradation its electrical conductivity. Oxygen‐doped (AgO x ) thicknesses as low 6 nm exhibit completely 2D continuous morphologies on ZnO films, smaller reflections absorbances, sheet resistances compared with those discontinuous granular‐type same thickness....
Abstract Advances in flexible optoelectronic devices have led to an increasing need for developing highly efficient, low-cost, transparent conducting electrodes. Copper-based electrodes been unattainable due the relatively low optical transmission and poor oxidation resistance of copper. Here, we report synthesis a completely continuous, smooth copper ultra-thin film via limited with trace amount oxygen. The weakly oxidized thin sandwiched between zinc oxide films exhibits good...
Copper has attracted significant interests as an abundant and low‐cost alternative material for flexible transparent conducting electrodes (FTCEs). However, Cu‐based FTCEs still present unsolved technical issues, such their inferior light transmittance oxidation durability compared to conventional indium tin oxide (ITO) silver metal electrodes. This study reports a novel technique fabricating highly efficient composed of copper ultrathin film sandwiched between zinc oxides, with enhanced...
Improving the wetting ability of Ag on chemically heterogeneous oxides is technically important to fabricate ultrathin, continuous films that would facilitate minimization optical and electrical losses develop qualified transparent film electrodes in state-of-the-art optoelectronic devices. This goal has yet be attained, however, because conventional techniques improve based metallic layers are restricted by serious from layers. Herein, we report a simple effective technique partial...
GaAs nanowires were epitaxially grown on Si(001) and Si(111) substrates by using Au-catalyzed vapor-liquid-solid (VLS) growth in a solid source molecular beam epitaxy system. Scanning electron microscopy analysis revealed that almost all the along <111> directions both Si for conditions investigated. The had very uniform diameter direction. X-ray diffraction data transmission GaAs<111> mixed crystal structure of hexagonal wurtzite cubic zinc-blende. Current-voltage characteristics junctions...
The development of highly efficient flexible transparent electrodes (FTEs) supported on polymer substrates is great importance to the realization portable and bendable photovoltaic devices. Highly conductive, low-cost Cu has attracted attention as a promising alternative for replacing expensive indium tin oxide (ITO) Ag. However, efficient, Cu-based FTEs are currently unavailable because absence an means attaining atomically thin, completely continuous film that simultaneously exhibits...
Thermodynamically stable stoichiometric and higher oxidation states are known to be detrimental the electrical optical performances of Ag electrodes. In contrast, thermodynamically less or unstable suboxidation entailing extreme O deficiencies scarcely understood because tenuous null trace in suboxidized domains is difficult detect. This paper presents an experimental confirmation numerical interpretation Ag-layered electrodes influences post-growth reduction on their optoelectrical...
Controlling the shape and crystallography of nanocrystals during early growth stages a noble metal layer is important because its correlation with final morphology optoelectrical features, but this task unattainable in vapor deposition processes dominated by artificially uncontrollable thermodynamic free energies. We report on experimental evidence for controllable evolution Ag as induced addition nitrogen, presumed to be nonresidual lattice given strong float-out behavior. This atypical...
Artificially designing the crystal orientation and facets of noble metal nanoparticles is important to realize unique chemical physical features that are very different from those metals in bulk geometries. However, relative their counterparts synthesized wet-chemical processes, vapor-depositing with desired crystallographic while avoiding any notable impurities quite challenging because this task requires breaking away thermodynamically favorable geometry nanoparticles. We used...
Ag wetting on oxides is essential for implementing exceptional layered superstructures with simultaneous ultralow losses in electrical conductance and optical transmittance. This goal difficult to achieve by conventional synthetic techniques involving the incorporation of heterogeneous transition metals or metalloids into as inducers they cause detrimental optoelectrical changes. study provides novel insights use homogeneous seeds improve oxides. We investigated effect atomic O improvement...
A vital objective in the wetting of Au deposited on chemically heterogeneous oxides is to synthesize a completely continuous, highly crystalline, ultrathin-layered geometry with minimized electrical and optical losses. However, no effective solution has been proposed for synthesizing an ideal Au-layered structure. This study presents evidence effectiveness atomic oxygen-mediated growth such layer by improving ZnO substrates substantial reduction free energy. The unexpected outcome can be...
Oxidation is adversely associated with inducing catastrophic degradation of the electrical and optical properties Ag film electrodes. Existing information largely distributed across thermodynamically favorable, stoichiometric, higher oxidation states. However, this elusive in affording a better understanding substoichiometric extremely oxygen-deficient states because conventional perspectives disregard plausibility oxidation. This study presents computational experimental evidence for...
For the management of hilar malignant biliary obstruction (HMBO), endoscopic drainage (EBD) is preferred over percutaneous transhepatic (PTBD) because its convenience. However, there no established guideline for that requires multiple stenting. In this study, we compared efficacy bilateral metal stents (BMS) versus plastic (MPS).In retrospective analyzed 102 patients who underwent EBD with either BMS or MPS due to HMBO caused by cholangiocarcinoma between 1996 and 2018 at Samsung Medical...
The desire to enhance the efficiency of organic light-emitting devices (OLEDs) has driven investigation advanced materials with fascinating properties. In this work, top-emission OLEDs (TEOLEDs) is enhanced by introducing ampicillin microstructures (Amp-MSs) dual phases (α-/β-phase) that induce photoluminescence (PL) and electroluminescence (EL). Moreover, Amp-MSs can adjust charge balance Fermi level (EF ) alignment, thereby decreasing leakage current. decrease in wave-guided modes light...