A5101842533- Advanced Photocatalysis Techniques
- Gas Sensing Nanomaterials and Sensors
- Electrowetting and Microfluidic Technologies
- TiO2 Photocatalysis and Solar Cells
- Perovskite Materials and Applications
- Advanced optical system design
- Biosensors and Analytical Detection
- Luminescence Properties of Advanced Materials
- Chalcogenide Semiconductor Thin Films
- Advanced Nanomaterials in Catalysis
- Solid-state spectroscopy and crystallography
- Electrochemical Analysis and Applications
- Advanced Surface Polishing Techniques
- Copper-based nanomaterials and applications
- Iron oxide chemistry and applications
- Catalytic Processes in Materials Science
- Covalent Organic Framework Applications
- Industrial Gas Emission Control
- Advanced oxidation water treatment
- Quantum Dots Synthesis And Properties
- Thin-Film Transistor Technologies
- Electron and X-Ray Spectroscopy Techniques
- Conducting polymers and applications
- Electrohydrodynamics and Fluid Dynamics
- Ammonia Synthesis and Nitrogen Reduction
San Diego State University
2021-2024
Kyungpook National University
2004-2023
Sungkyunkwan University
2017-2022
Sookmyung Women's University
2018-2021
Hanyang University
2021
Seoul Institute
2021
Korea Institute of Energy Research
2019
Pukyong National University
2015
Dong-Eui University
2015
Korea Polytechnic University
2004-2009
High-quality and millimeter-sized perovskite single crystals of CsPbBr3 Cs4PbBr6 were prepared in organic solvents studied for correlation between photocurrent generation photoluminescence (PL) emission. The crystals, which have a 3D structure, showed highly sensitive photoresponse poor PL signal. In contrast, 0D exhibited more than 1 order magnitude higher intensity CsPbBr3, generated an ultralow under illumination. Their contrasting optoelectrical characteristics attributed to different...
Abstract As the development of oxygen evolution co-catalysts (OECs) is being actively undertaken, tailored integration those OECs with photoanodes expected to be a plausible avenue for achieving highly efficient solar-assisted water splitting. Here, we demonstrate that black phosphorene (BP) layer, inserted between OEC and BiVO 4 can improve photoelectrochemical performance pre-optimized OEC/BiVO (OEC: NiOOH, MnO x, CoOOH) systems by 1.2∼1.6-fold, while overlayer, in turn, suppress BP...
A two-photon tandem absorption E-BiVO 4 /BPQDs/OL-OEC photoanode with superior light absorbability and photocurrent density.
Abstract High‐efficiency solid‐state‐ligand‐exchange (SSE) step‐free colloidal quantum dot photovoltaic (CQDPV) devices are developed by employing CQD ink based active layers and organic (Polythieno[3,4‐b]‐thiophene‐co‐benzodithiophene (PTB7) poly(3‐hexylthiophene) (P3HT)) hole transport (HTLs). The device using PTB7 as an HTL exhibits superior performance to that the current leading HTL, P3HT, because of favorable energy levels, higher mobility, facilitated interfacial charge transfer....
In the study of electrocatalysis, precise measurement voltammetric responses for electrode materials is an essential step in evaluating them accurately and understanding electron transfer at electrode/electrolyte interfaces. Due to growing concerns regarding validity Pt counter electrodes such measurements, largely attributed their dissolution redeposition, graphite increasingly being employed as a versatile conventional three-electrode systems. However, reliability this role has not been...
A photoconversion system that couples solar water splitting with denitrification (without chemical reductants) is proposed for controlling nitrate by developing a ternary composite composed of TiO<sub>2</sub>, Cu–Pd bimetals, and reduced graphene oxide.
This paper presents a continuous patterning method to enhance the productivity of metallic microstructure fabrication. The minimum exposure time and optimum ultraviolet (UV) intensity were determined for photoresist (PR) develop micro PR patterns in roll-type photolithography. To confirm efficiency photolithography, wet etching was performed instead dry as post-lithography process. Parametric study results showed that required sufficient reaction during photolithography 0.2 s under 1000 mW...
Abstract A novel driving scheme, named Dynamic Capacitance Compensation (DCC), for active‐matrix (AM) LCDs was developed. It takes the charge‐&‐hold nature of AM‐LCDs into consideration to enhance switching speed. By incorporating DCC and faster liquid crystal, a TFT‐LCD whose response time less than 10 ms all gray levels with on + off 8.4 can be applied any kind LCD modes reduce 1 frame.
Spark plasma sintering (SPS) is one of the most promising technologies for producing polycrystalline transparent ceramics. However, it has limitations regarding complexity geometries that can be produced. This study addresses these by combining additive manufacturing techniques with spark sintering. Additionally, a Multiphysics model based on continuum theory employed to predict outcomes SPS process, particularly microstructure densified parts. As result, geometrically complex Al2O3 parts...
This review summarizes the recent progress in photocatalytic conversion of aqueous- and gas-phase nitrogen species to molecular highlights factors affecting efficiency selectivity for nitrogen.
Nickel oxides (NiO) as hole transport layers (HTLs) in inverted-type perovskite solar cells (PSCs) have been widely studied mainly because of their high stability under illumination. Increases the power conversion efficiency (PCE) with NiO HTLs presented numerous reports, although photoluminescence (PL) quenching behavior does not coincide PCE increase. The dynamics charge carrier between and organic–inorganic halide absorbers is clearly understood yet quite unusual, contrast to...
Fe3+ is widely used as a conduction band electron acceptor in the photocatalytic and photoelectrochemical (PEC) oxidation of water various substrates. However, question possible involvement valence hole has been raised. Herein, we demonstrate that PEC using oxide semiconductor (WO3, TiO2, BiVO4; primarily WO3) films can proceed via formation high-valent iron species presence aqueous ions at pH 1–3. The (1–100 mM) enhances photocurrent generation, O2 evolution, Faradaic efficiency (FE) ∼90%...
The efficient coupling of light absorbers with catalysts is the most critical step in multielectron transfer process for CO2 conversion. Here a heterogenized photoconversion system consisting noncovalent assembly tested and proposed. Nafion (Nf) polymer employed as simple robust platform that couples absorber (Ru-(bpy)32+: RuL) catalyst (fac-Re(bpy)(CO)3Cl: Re(I)) without making any chemical linkage between them to drive reductive conversion CO. results clearly show ternary Re(I)-RuL-Nf...
As diagnostic biosensors for analyzing fluids from the human body, development of inorganic NPs is increasing concern. For one, nanoceramic phosphors have been studied to meet requirements biological, imaging, and applications. In this study, Y2O3 co-doped with trivalent rare earths (erbium ytterbium) were obtained using a liquid phase–pulsed laser ablation (LP–PLA) method after getting high density Er, Yb:Y2O3 ceramic targets by Spark plasma sintering (SPS). Most are under 50 nm in diameter...
The importance of catalytic CO oxidation for exhaust gas processing has inspired the development efficient and durable catalysts that can be operated at low temperatures, as exemplified by supported noble metals. However, most related studies have neglected potential effects co-present components, such NO. Herein, we compared performances platinized bare TiO2 ambient-temperature (photo)catalytic O2 in co-presence NO used situ Fourier transform infrared spectroscopy to elucidate platinization...