A5101990155- Quantum Dots Synthesis And Properties
- Graphene research and applications
- Nanowire Synthesis and Applications
- Semiconductor Quantum Structures and Devices
- Carbon Nanotubes in Composites
- Diamond and Carbon-based Materials Research
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Industrial Gas Emission Control
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Semiconductor Lasers and Optical Devices
- Cyclone Separators and Fluid Dynamics
- Graphite, nuclear technology, radiation studies
- Boron and Carbon Nanomaterials Research
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- Fluid Dynamics and Mixing
- Vehicle emissions and performance
- Catalytic Processes in Materials Science
- Graphene and Nanomaterials Applications
Seoul National University
2018-2024
Pusan National University
2020
Korea Institute of Science and Technology
2014-2019
Yonsei University
2017-2019
Over the history of carbon, it is generally acknowledged that Bernal AB stacking sp2 carbon layers unique crystalline form graphite. The universal graphite structure synthesized at 2,600~3,000 °C and exhibits a micro-polycrystalline feature. In this paper, we provide evidence for metastable with an AA' structure. non-Bernal allotrope by thermal- plasma-treatment graphene nanopowders ~1,500 °C. formation bilayer nuclei facilitates preferred texture growth results in single-crystal nanoribbons...
Raman spectra of single-wall carbon nanotubes (SWNTs) exhibit a unique radial breathing mode (RBM) band (∼100–300 cm–1) and G– peak (∼1570 cm–1), along with D (∼1350 cm–1). We show that the typical signals for SWNTs are signature their helical structure determined using density functional theory simulation structural analysis hydrogenated dehydrogenated SWNT samples. demonstrate at ∼1570 cm–1 is to opened tubular graphene structures ∼2 nm diameter. also ∼1350 originated from edge defects...
Abstract In this paper, we demonstrate the seeded growth of graphene under a plasma chemical vapor deposition condition. First, fabricate nanopowders (~5 nm) by ball-milling commercial multi-wall carbon nanotubes. The nanoparticles were subsequently subject to direct current generated in 100 Torr 10%CH 4 - 90%H 2 gas mixture. enlarged, over one hour, nuclei sheets larger than hundred nm area. Characterization electron and X-ray diffraction, high-resolution transmission microscopy images...
To achieve a simplified method instead of resin-induced post-treatment, 2-hydroxyethyl methacrylate, component the resin, was pre-mixed with ZnMgO nanoparticles, leading to enhanced efficiency and lifetime.
Conducting polymer-grafted InP-based hybrid quantum dots (QDs) show enhanced morphology and optoelectronic properties, resulting in improved efficiency stability QD light-emitting diodes using them.
One of the unsolved fundamental issues graphene is establishing an appropriate way to discern layers structures. We report a simple methodology analyze structures using Raman signals in range ∼100 ∼500 cm–1 comprising clear 118 or 175 peaks. demonstrate that low-energy on spectra plasma-seeded grown sheets originated from nanocurvature (c) mono- (175 and 325–500 signals) (c ≈ 1 nm) bilayer (118 peak) 2 with simulations, based radial mode (RM) Eigen vectors. Our RM model provides standard...
Abstract It is important to specify and control factors that significantly affect the performance stability of organic solar cells (OSCs). Bulk heterojunctions (BHJs) prepared by spin‐coating donor/acceptor mixtures form vertically laterally complex nanostructures, making them difficult control. Herein, various solvent‐dissolved PTB7‐th/PC 70 BM‐based sequentially processed OSCs are demonstrated their thin‐film properties in terms interfacial crystallinity compared. The interfaces PC BM...
Graphene oxide (GO) offers comparable efficiency in organic solar cells (OSCs) compared to the hole extraction layer (HEL), poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), while shelf lifetime shows a 6-fold increase.
We demonstrated a bank structure for inkjet‐printed quantum dot light‐emitting diodes (QLEDs) fabricated through photolithography process using black photoresist (B‐PR). The B‐PR banks have low surface energy (13 mJ m −2 ), resulting in well confined (QD) ink inside the pixel area. Based on structure, we QLED with 0.20 % of external efficiency.