A5015826340- Electrocatalysts for Energy Conversion
- Conducting polymers and applications
- Perovskite Materials and Applications
- Fuel Cells and Related Materials
- Organic Electronics and Photovoltaics
- Catalytic Processes in Materials Science
- Quantum Dots Synthesis And Properties
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Advanced battery technologies research
- Advanced Memory and Neural Computing
- Machine Learning in Materials Science
- Organic Light-Emitting Diodes Research
- nanoparticles nucleation surface interactions
- Catalysis and Hydrodesulfurization Studies
- Education and Learning Interventions
- Chalcogenide Semiconductor Thin Films
- Electrochemical Analysis and Applications
- Graphene research and applications
- Thermal Expansion and Ionic Conductivity
- Advanced Battery Technologies Research
- interferon and immune responses
- Horticultural and Viticultural Research
- Luminescence and Fluorescent Materials
Sungshin Women's University
2022-2025
Ulsan National Institute of Science and Technology
2025
Johns Hopkins Medicine
2020-2022
Carilion Clinic
2022
Cleveland Clinic Lerner College of Medicine
2022
Case Western Reserve University
2022
Georgetown University
2022
Virginia Tech
2022
Korea Institute of Science and Technology
2019-2022
Johns Hopkins University
2020-2022
Perovskite solar cells (PeSCs) have been considered one of the competitive next generation power sources. To date, light-to-electric conversion efficiencies rapidly increased to over 10% and further improvements are expected. However, poor device reproducibility PeSCs ascribed their inhomogeneously covered film morphology has hindered practical application. Here, we demonstrate high-performance with superior by introducing small amounts N-cyclohexyl-2-pyrrolidone (CHP) as a controller into...
Recently, many kinds of printing processes have been studied to fabricate perovskite solar cells (PeSCs) for mass production. Among them, slot-die coating is a promising candidate roll-to-roll processing because high-throughput, easy module patterning, and premetered system. In this work, we employed mixed lead precursors consisting PbAc2 PbCl2 PeSCs via coating. We observed that slot-die-coated films based on the exhibited well-grown uniform morphology, which was hard achieve by using only...
Based on experimental and computational evidence, phthalocyanine (Pc) compounds in the form of quaternary-bound metal-nitrogen (N) atoms are most effective catalysts for oxygen reduction reaction (ORR). However, heat treatment process used their synthesis may compromise ideal structure, causing agglomeration transition metals. To overcome this issue, a novel method is developed synthesizing iron (Fe) single-atom with structures supported by thermally exfoliated graphene oxide (GO). This...
Catalyst poisoning remains a persistent barrier to the efficiency and longevity of electrocatalytic energy conversion devices, namely fuel cells. To address this challenge, review provides systematic investigation recent advancements in mitigation strategies, with particular emphasis on surface engineering, alloying, combined approaches. Notable developments include rational design Pt-alloy catalysts enhanced CO, H2S, H3PO4 tolerance as well implementation anti-poisoning molecular...
Organometallic halide perovskite-based solar cells have exhibited rapidly increasing efficiencies through the use of mesoporous composites. The addition materials used in organic to (PSCs) enables fabrication low-cost, flexible, low-temperature, solution-processed PSCs. However, obtaining sufficient coverage layer, usually poly(3,4-ethylenedioxythiophene)–poly(styrenesulfonate) (PEDOT:PSS), with CH3NH3PbI3–xClx films remains difficult spite advances. In this study, we investigated influence...
The current understanding of the crystallization, morphology evolution, and phase stability wide‐bandgap hybrid perovskite thin films is very limited, as much community's focus on lower bandgap systems. Herein, crystallization behavior film formation a wide tunable MAPbBr 3 − x Cl system are investigated, its contrasted to classical MAPbI Br case. A multiprobe in situ characterization approach consisting synchrotron‐based grazing incidence wide‐angle X‐ray scattering laboratory‐based...
The role of the additive and solvate phases in direct formation perovskite crystals was revealed by <italic>in situ</italic> analysis during spin-coating condition.
Beyond the von Neumann architecture, neuromorphic computing attracts considerable attention as an energy-efficient system for data-centric applications. Among various synapse device candidates, a memtransistor with three-terminal structure has been considered to be promising one artificial controllable weight update characteristics and strong immunity disturbance due decoupled write read electrode. In this study, oxygen ion exchange-based electrochemical random-access memory consisting of...
The new D–A type conjugated polymers were synthesized to confirm that structural characteristics, such as the presence of coplanar units and a conformation.
For the first time, photovoltaic modules composed of small molecule were successfully fabricated by using roll-to-roll compatible printing techniques. In this study, blend films molecules, BTR and PC71BM slot-die coated a halogen-free solvent system. As result, high efficiencies 7.46% 6.56% achieved from time-consuming vapor annealing (SVA) treatment additive approaches, respectively. After successful verification our method on small-area devices, we further large-area with total active area...
The morphology of conjugated polymer thin films, determined by the kinetics film drying, is closely correlated with their electrical properties. Herein, we focused on dramatic changes in thin-film blade-coated poly{[N,N'-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5'-(2,2'-bithiophene)} caused effect solvent and coating temperature. Through situ measurements, evolution aggregates crystallites, which plays a decisive role formation charge-transport pathway, was...
Summary Direct ammonia fuel cells (DAFCs), wherein the oxidation reaction (AOR) occurs at anode and oxygen reduction cathode, are a promising clean energy production system using easily liquefied because they exhibit high density. However, only few catalysts are, thus far, available for AOR of its sluggish six‐electron‐based kinetics. Pt (100) is considered an optimal catalyst AOR; however, synthesis pristine difficult it requires use strong capping agents faceting particles. Moreover, block...
For the commercialization of fuel cells, it is necessary to use pure hydrogen. This because carbon monoxide (CO) present in hydrogen generated by reformation hydrocarbon-based fuels directly affects cell performance when Pt used. To improve CO oxidation reactions on surface, various methods have been reported such as tuning electronic structure weaken Pt–CO bond (electronic effect) and increasing amount supplied oxygen species (bifunctional effect). Herein, we synthesized a island RuO2/C...
In Pt-based alloy structures, selective leaching out of the non-Pt metal component (known as "dealloying)" improves catalytic activity during operation due to an increase in electrochemically active surface area. This indicates that electrochemical stimulus induces structural change, and plays important role determining performance. this study, we prepared highly durable Pd@Cu@Pt core–shell catalysts for acidic oxygen reduction reaction by a facile method elucidated correlation between...