A5100752175- Geometry and complex manifolds
- Organic Electronics and Photovoltaics
- Geometric and Algebraic Topology
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Luminescence and Fluorescent Materials
- Advanced Combinatorial Mathematics
- Algebraic Geometry and Number Theory
- Geometric Analysis and Curvature Flows
- Perovskite Materials and Applications
- Conducting polymers and applications
- Graphene research and applications
- Advanced Algebra and Geometry
- Organic Light-Emitting Diodes Research
- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Homotopy and Cohomology in Algebraic Topology
- Chemical Synthesis and Reactions
- Quantum and electron transport phenomena
- Molecular Junctions and Nanostructures
- 2D Materials and Applications
- Semiconductor materials and devices
- Oxidative Organic Chemistry Reactions
- Electronic and Structural Properties of Oxides
Korea Institute of Science and Technology
2024-2025
Konkuk University
2018-2024
University of Würzburg
2024
Research Institute of Industrial Science and Technology
2016-2024
Pohang Iron and Steel (South Korea)
2016-2024
Seoul National University
1995-2023
Chosun University
2013-2022
Asan Medical Center
2022
University of Ulsan
2022
Bavarian Polymer Institute
2021-2022
A highly sensitive short-wave infrared (SWIR, λ > 1000 nm) organic photodiode (OPD) is described based on a well-organized nanocrystalline bulk-heterojunction (BHJ) active layer composed of dicyanovinyl-functionalized squaraine dye (SQ-H) donor material in combination with PC
Abstract Blend membrane consisting of poly(vinyl alcohol) (PVA) and chitosan was prepared from a solvent‐casting technique characterized for their intermolecular interactions using infrared X‐ray diffraction methods. Cross‐linking the blend with glutaraldehyde produces lower crystallinity smaller swelling degree, but having improved thermostability mechanical properties. The present shows pH‐dependent characteristic will be discussed in detail. © 1992 John Wiley & Sons, Inc.
We report on a molecularly tailored 1:1 donor-acceptor (D-A) charge-transfer (CT) cocrystal that manifests strongly red-shifted CT luminescence characteristics, as well noteworthy reconfigurable self-assembling behaviors. A loosely packed molecular organization is obtained consequence of the noncentrosymmetric chemical structure molecule A1, which gives rise to considerable free volume and weak intermolecular interactions. The stacking features complex result in an external...
A new 2:1 donor (D):acceptor (A) mixed-stacked charge-transfer (CT) cocrystal comprising isometrically structured dicyanodistyrylbenzene-based D and molecules is designed synthesized. Uniform 2D-type morphology manifested by the exquisite interplay of intermolecular interactions. In addition to its appealing structural features, unique optoelectronic properties are unveiled. Exceptionally high photoluminescence quantum yield (ΦF ≈ 60%) realized non-negligible oscillator strength S1...
Concerning the safety aspects of high-voltage Li-ion batteries, a pelletized hybrid solid electrolyte (HSE) was prepared by blending Li<sub>7</sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub> (LLZO) ceramic particles and an ionic liquid (ILE) for use in pseudo-solid-state batteries.
Abstract In the metal triflate‐catalyzed hydroarylation of alkynes, employing an ionic liquid dramatically enhanced catalytic activities, resulting in broadening scope substrates (arenes and alkynes). some cases, even reactions that were not possible conventional organic solvents proceeded smoothly liquids. Moreover, phase containing catalyst could be readily recovered by simple decantation layer after reaction reused for following runs without any significant loss activity. Mechanistic...
Abstract Modern strides in energy storage underscore the significance of all‐solid‐state batteries (ASSBs) predicated on solid electrolytes and lithium (Li) metal anodes response to demand for safer batteries. Nonetheless, ASSBs are often beleaguered by non‐uniform Li deposition during cycling, leading compromised cell performance from internal short circuits hindered charge transfer. In this study, concept “bottom deposition” is introduced stabilize based lithiophilic current collector a...
A series of indolo[3,2‐b]indole (IDID) derivatives comprising the core unit N , ‐dihexyl‐IDID with different aromatic and aliphatic substituents at 2‐ 7‐position are designed synthesized to construct high‐performance organic semiconductors by processing routes. Structure‐property relationship is comprehensively studied in terms their photophysical, electrochemical, structural, electrical characteristics. IDID either evaporated vacuum or dissolved common solvents ensure applicalbility routes...
Abstract Interlayer coupling in graphene-based van der Waals (vdW) heterostructures plays a key role determining and modulating their physical properties. Hence, its influence on the optical electronic properties cannot be overlooked order to promote various next-generation applications opto-electronic devices based low-dimensional materials. Herein, electrical of vertically stacked large area heterostructure monolayer graphene transferred onto oxide film are investigated. An effective...
Fluorophores emitting in the near-infrared (NIR) are highly desired for various applications, but increasing nonradiative rates cause severe fluorescence quenching wavelengths beyond 800 nm. Here, a bis(squaraine) dye is reported that bears two NIR dyes head-to-tail chromophore arrangement. This arrangement leads to intramolecular J-type exciton coupling, resulting an absorption maximum at 961 nm and peak 971 with quantum yield of 0.33% chloroform. In less polar toluene, self-assembles into...
Human retina- and brain-inspired optoelectronic synapses, which integrate light detection signal memory functions for data processing, have significant interest because of their potential applications artificial vision technology. In nature, many animals such as mantis shrimp use polarized information well scalar including wavelength intensity; however, a spectropolarimetric organic synapse has been seldom investigated. Herein, we report an synaptic phototransistor, consisting charge...
A nanostructured perfluoropolymer paint with high solar reflectance and selective infrared emittance has been developed, highlighting the importance of optimizing chemical structure polymer binder for radiative cooling.
Submillimeter sized n-channel organic single crystalline nanosheet based on dicyanodistyrylbenzene derivative, (2E,2′E)-3,3′-(2,5-dimethoxy-1,4-phenylene)bis(2-(5-(4-(trifluoromethyl)phenyl)thiophen-2-yl)acrylonitrile) (Me-4-TFPTA), is developed. Strong π–π interaction, hydrogen bonding interactions derived from cyano group (CN) as well solvent inclusion along the lateral direction play a key role in forming morphology. Me-4-TFPTA nanosheets exhibit excellent field-effect electron mobility...
Abstract We report on a molecularly tailored 1:1 donor–acceptor (D‐A) charge‐transfer (CT) cocrystal that manifests strongly red‐shifted CT luminescence characteristics, as well noteworthy reconfigurable self‐assembling behaviors. A loosely packed molecular organization is obtained consequence of the noncentrosymmetric chemical structure molecule A1 , which gives rise to considerable free volume and weak intermolecular interactions. The stacking features complex result in an external...
BL-11C, a new protein crystallography beamline, is an in-vacuum undulator-based microfocus beamline used for macromolecular at the Pohang Accelerator Laboratory and it was made available to users in June 2017. The energy tunable range 5.0-20 keV support conventional single- multi-wavelength anomalous-dispersion experiments against wide of heavy metals. At standard working 12.659 keV, monochromated beam focused 4.1 µm (V) × 8.5 (H) full width half-maximum sample position measured photon flux...
Lithium metal anode (LMA) emerges as a promising candidate for lithium (Li)-based battery chemistries with high-energy-density. However, inhomogeneous charge distribution from the unbalanced ion/electron transport causes dendritic Li deposition, leading to "dead Li" and parasitic reactions, particularly at high utilization ratios (low negative/positive in full cells). Herein, an innovative LMA structural model deploying hyperporous/hybrid conductive architecture is proposed on single-walled...
By employing superacidic fluoroantimonate ionic liquid (IL), [bmim][Sb2F11], as catalyst, not only thermodynamically-controlled but also kinetically-controlled Friedel–Crafts alkenylations of arenes with alkynes have been realized for the first time.