A5085942092- Membrane Separation and Gas Transport
- Organic Light-Emitting Diodes Research
- Covalent Organic Framework Applications
- Coastal and Marine Dynamics
- Organic Electronics and Photovoltaics
- Fuel Cells and Related Materials
- Earthquake and Tsunami Effects
- Advanced Battery Materials and Technologies
- Membrane Separation Technologies
- Synthesis and properties of polymers
- Fluid Dynamics Simulations and Interactions
- Tribology and Wear Analysis
- Extraction and Separation Processes
- Luminescence and Fluorescent Materials
- Wave and Wind Energy Systems
- Advanced Photocatalysis Techniques
- Semiconductor Quantum Structures and Devices
- Nanowire Synthesis and Applications
- Supercapacitor Materials and Fabrication
- Conducting polymers and applications
- biodegradable polymer synthesis and properties
- Polymer Nanocomposites and Properties
- Lubricants and Their Additives
- Polymer crystallization and properties
- TiO2 Photocatalysis and Solar Cells
Yonsei University
2016-2023
Korea Institute of Civil Engineering and Building Technology
2018-2022
Korea Research Institute of Chemical Technology
2017-2019
Korea University of Science and Technology
2017-2019
Seoul Institute
2019
Dae Hwa Pharm (South Korea)
2016
Korea Institute of Science and Technology
2015-2016
Dankook University
2011-2013
Hanyang University
2012
Hannam University
2012
Thermally stable high-triplet-energy hole transport materials based on 8H-indolo[3,2,1-de]acridine core (FPC) were synthesized and the device performances of FPC-based phosphorescent organic light-emitting diodes (OLEDs) investigated. The showed a high triplet energy (above 2.90 eV) glass-transition temperature 140 °C). hole-transport (HTMs) effective as HTMs for green deep-blue OLEDs, quantum efficiency (over 20%) was achieved in both devices.
High triplet energy hole transport materials based on novel fused indole core structure were synthesized and their device performances in deep blue phosphorescent organic light emitting diodes (PHOLEDs) investigated. The showed a high over 2.90 eV glass transition temperature 120 °C. used PHOLEDs gave external quantum efficiency of 24.7% with color coordinate (0.137,0.182).
High-molecular-weight (e.g., 1000000 g mol–1) poly(ethylene oxide) (PEO) is a candidate polymer for CO2 separation membranes because of its low cost and high affinity. However, high-molecular-weight PEO contain large crystallites, which cause structural defects. Here, we report defect-free, with good performance prepared using amine-branched poly(amidoamine) (PAMAM) dendrimers. PAMAM, obtained by two-step addition polymerization, acts as filler in the all-polymer membranes. The...
Comparative studies on the performances of floating-base InGaP-GaAs heterojunction bipolar phototransistors (HPTs) with and without base contact metal were carried out. Both fabricated HPTs (HPTs-WB) (HPTs-WOB) exhibited collector dark current as low 0.2 pA when they operated in a configuration at V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">CE</sub> = 1 V. The HPTs-WOB demonstrated much higher optical gain (120 an power 1.1 μW irradiated...
CO2 separation technology using polymeric membranes has emerged as a viable solution to mitigate the rapidly increasing anthropogenic emissions, which are directly linked global warming and climate anomalies. However, in order improve gas performance, an intrinsic problem of membranes, i.e., trade-off relationship between permeability selectivity, needs be addressed. In this study, solid-state facilitated transport membrane is prepared by blending CO2-philic, amine-compatible poly(vinyl...
LaFeO<sub>3</sub> photocathodes with high porosity and uniformity are developed through polymer templating Triton X-100, improving charge separation boosting photocurrents achieved.
Colloidal nanosphere self-assembly effectively generates ordered nanostructures, prompting tremendous interest in many applications such as photonic crystals and templates for inverse opal fabrication. Here we report the of low-cost, graft copolymer nanospheres CO2 capture membranes. Specifically, poly(dimethylsiloxane)-graft-poly(4-vinylpyridine) (PDMS-g-P4VP) is synthesized via one-pot, free radical dispersion polymerization to give discrete monodisperse nanospheres. These comprise a...
ABSTRACT A series of polyester copolymers was synthesized via melt polycondensation dimethyl terephthalate (DMT), isophthalate (DMI), and 1,4‐butanediol (BDO) with dimer acid methyl ester (DAME) monomers, previously prepared by the Diels–Alder reaction fatty esters (FAMEs). We obtained desired composition a high molar mass characterized 1 H NMR, FT‐IR, SEC. The relationship among composition, thermal behavior, mechanical properties, adhesion properties these examined, demonstrating that...
ABSTRACT A series of dimer acid (DA)‐modified polyamide 11 copolymers is synthesized via melt polycondensation from 11‐aminoundecanoic acid, hexamethylene diamine (HMDA), and DA, prepared by the hydrolysis waste vegetable oil a subsequent Diels–Alder reaction. The molecular structures polymers' molar masses are characterized nuclear magnetic resonance, Fourier‐transform infrared spectroscopy, size exclusion chromatography. thermal mechanical properties modified with increasing composition DA...
Vacuum resin infusion has been developed as a low-cost process for manufacturing fiber-reinforced composites with high fiber loading. However, it is an extremely slow due to the long time required prepare vacuum-tight mold and further cure at room temperature. In this work, new rubber cushion suitable rapid curing under complete negative pressure was designed fabricated. Experimental results demonstrated that heating withstand dynamic loading vacuum force. Composite plaques can be produced...
We present a synthesis of organized mesoporous metal oxide films with high porosity and good interconnectivity using an amphiphilic PVA–PMMA comb copolymer which can be promising template as alternative to conventional block copolymers.