A5065108673- Concrete Corrosion and Durability
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Structural Behavior of Reinforced Concrete
- Supramolecular Self-Assembly in Materials
- Concrete and Cement Materials Research
- Chemical Synthesis and Analysis
- Structural Health Monitoring Techniques
- Multilevel Inverters and Converters
- Structural Integrity and Reliability Analysis
- Advanced DC-DC Converters
- Advanced biosensing and bioanalysis techniques
- Fire effects on concrete materials
- Structural Engineering and Vibration Analysis
- Conducting polymers and applications
- Marine and Coastal Research
- Dyeing and Modifying Textile Fibers
- Innovative concrete reinforcement materials
- Smart Materials for Construction
- Polydiacetylene-based materials and applications
- Color Science and Applications
- Microgrid Control and Optimization
- Engineering Applied Research
- Concrete Properties and Behavior
- Chalcogenide Semiconductor Thin Films
Daegu Gyeongbuk Institute of Science and Technology
2021-2025
Hyundai Motors (South Korea)
1998-2024
Yonsei University
2012-2023
Konkuk University Medical Center
2023
Konkuk University
2018-2022
Seoul National University Hospital
2022
LG (South Korea)
2019
Seoul National University
2014-2018
Korea Institute of Ocean Science and Technology
2003-2014
Dong-A University
2008
The deprotonation of organic cations and oxidation halide ions in perovskite are major degradation factors causing irreversible stability efficiency loss devices. To address these issues, we designed...
Bandtail broadening originating from increasing the polydispersity of colloidal quantum dots (CQDs) deteriorates open-circuit voltage (VOC) and hinders charge-carrier transport in CQD photovoltaics. The development synthetic routes has enabled preparing monodisperse perovskite CQDs (Pe-CQDs) that have attracted attention as promising absorbers However, polar-antisolvent-based purification induces dissolution agglomeration Pe-CQDs, resulting an irregular size distribution. Consequently,...
The ligand exchange procedure of CsPbI3 perovskite quantum dots (PQDs) enables the fabrication thick and conductive PQD solids that act as a photovoltaic absorber for solution-processed thin-film solar cells. However, ligand-exchanged suffer from deterioration in performance ambient stability due to surface traps, such uncoordinated Pb2+ sites on surface, which are generated after conventional process using ionic short-chain ligands dissolved polar solvents. Herein, facile stabilization is...
Abstract In terms of surface passivation for realizing efficient CsPbI 3 ‐perovskite quantum dot (CsPbI ‐PQD)‐based optoelectronic devices, phenethylammonium iodide (PEAI) is widely used during the ligand exchange. However, PEA cation, due to its large ionic radius incompatible with 3D perovskite framework, acts as an organic spacer within polycrystalline perovskites, leading formation reduced dimensional perovskites (RDPs). Despite sharing identical influence PEAI on structure ‐PQDs remains...
Abstract Effective passivation of grain boundaries in perovskite solar cells is essential for achieving high device performance and stability. However, traditional polymer‐based strategies can introduce challenges, including increased series resistance, disruption charge transport, insufficient coverage. In this study, a novel approach proposed that integrates multifunctional ambipolar polymer into to address these issues. The successfully incorporated both the film hole transport layer...
The hole transport layer (HTL) plays a key role in inverted perovskite solar cells (PSCs), and nickel oxide has been widely adopted for HTL. However, conventional solution‐processed bottom‐up approach NiO x (S‐NiO) HTL fabrication shows several drawbacks, such as poor coverage, irregular film thickness, numerous defect sites, inefficient extraction from the layer. To address these issues, herein, novel top‐down synthesis route via electrochemical anodization is developed. basicity of...
We present a method to synthesize stable and uniform high-quality perovskite nanocrystals (PNCs) by using excess halide recover surface defects in CsPbBr3/ZnS core/shell nanocrystals. Use of N-bromosuccinimide as donor recovered vacancies bare CsPbBr3 PNCs during the growth ZnS shell, confirmed DFT calculations. This approach achieves high photoluminescence quantum yield nearly 1, significantly increases stability under adverse conditions such humidity elevated temperature. PNC...
Understanding the dynamic behavior of nanostructural systems is important during development controllable and tailor-made nanomaterials. This particularly true for nanostructures that are intended biological applications because biomolecules usually highly responsive to external stimuli. In this Article, we investigated structural conformational dynamics self-assembling bioactive β-sheet peptide using electron paramagnetic resonance (EPR) spectroscopy. The model characterized by cross-β...
In this paper, vibration-based methods to monitor damage in foundation-structure interface of harbor caisson structure are presented. The following approaches implemented achieve the objective. Firstly, monitoring utilizing a variety vibration features selected for structure. Autoregressive (AR) model time-series analysis and power spectral density (PSD) frequency-domain detect change Also, changes modal parameters such as natural frequency mode shape examined Secondly, feasibility is...
In this study, HIV-1 Rev response element (RRE) RNA was detected via an Au-coated vertical silicon nanowire electrode array (VSNEA). The VSNEA fabricated by combining bottom-up and top-down approaches then immobilized artificial peptides for the recognition of RRE. Differential pulse voltammetry (DPV) analysis used to measure electrochemical peptide-immobilized concentration types RRE RNA. DPV peaks showed linearity with a detection limit down 1.513 fM. It also clear different mutated high...
Although self-assembled peptide nanostructures (SPNs) have shown potential as promising biomaterials, there is a problem associated with the extremely slow hydrolysis rate of amide bonds. Here, we report development cell-penetrating cross-β SPNs controllable biodegradation rate. The designed self-assembling β-sheet incorporating hydrolyzable ester bond (self-assembling depsipeptide; SADP) can be assembled into bilayer β-sandwich one-dimensional (1D) fibers similarly to conventional peptides....
A nanostructured spiro-OMeTAD can be fabricated via nanoimprint soft lithography and realizes back-side perovskite quantum dot solar cells showing improved photovoltaic performance due to the enhanced light absorption photocurrent.
We explore here the possibility that polypeptide chains with directional multiplicity might provide for control of peptide self-assembly processes. tested this new using an oppositely directed (ODP) supramolecular system. The ODP could make it possible to form a βαβ motif antiparallel β-sheets, which does not exist in nature. Furthermore, designed ODPs were able self-assemble into discrete, homogeneous, and structured protein-like controlled nano-objects. represent simple but powerful...