A5091260040- Perovskite Materials and Applications
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
- Solid State Laser Technologies
- Photonic Crystals and Applications
- Semiconductor Quantum Structures and Devices
- Photonic and Optical Devices
- Metamaterials and Metasurfaces Applications
- Enhanced Oil Recovery Techniques
- Rheology and Fluid Dynamics Studies
- Advanced Antenna and Metasurface Technologies
- Granular flow and fluidized beds
- Plasmonic and Surface Plasmon Research
- Surfactants and Colloidal Systems
- Advanced Control Systems Optimization
- Advanced Battery Technologies Research
- Optical properties and cooling technologies in crystalline materials
- Catalytic Processes in Materials Science
- Process Optimization and Integration
- Synthesis and properties of polymers
- Advancements in Battery Materials
- Catalysis and Hydrodesulfurization Studies
- Solid-state spectroscopy and crystallography
- Advanced Photonic Communication Systems
- Organic Electronics and Photovoltaics
Hanyang University
2025
North Carolina State University
2024
Inha University
2020-2023
The University of Texas at Dallas
2017-2023
Texas A&M University
2021-2022
Korea Advanced Institute of Science and Technology
2018
The University of Sydney
2018
Daejeon University
2018
Government of the Republic of Korea
2018
Korea University
2017
Solution-processed organic–inorganic lead halide perovskites have recently emerged as promising gain media for tunable semiconductor lasers. However, optically pumped continuous-wave lasing at room temperature, a prerequisite laser diode, has not been realized so far. Here, we report action in surface-emitting distributed feedback methylammonium iodide (MAPbI3) perovskite on silicon substrate temperature under optical pumping. This outstanding performance is achieved because of the ultralow...
We produced poro-us poly(ε-caprolactone) (PCL)/hydroxyapatite (HA) composite scaffolds for bone regeneration, which can have a tailored macro/micro-porous structure with high mechanical properties and excellent in vitro bioactivity using non-solvent-induced phase separation (NIPS)-based 3D plotting. This innovative plotting technique create highly microporous PCL/HA filaments by inducing unique solutions through the non-solvent-solvent exchange phenomenon. The various HA contents (0 wt %, 10...
Perovskite light-emitting diodes (PeLEDs) have drawn considerable attention for their favorable optoelectronic properties. electrochemical cells (PeLECs)—devices that utilize mobile ions—have recently been reported but yet to reach the performance of best PeLEDs. We leveraged a poly(ethylene oxide) electrolyte and lithium salt in CsPbBr3 thin films produce PeLECs improved brightness efficiency. In particular, we found single-layer PeLEC from CsPbBr3:PEO:LiPF6 with 0.5 wt % LiPF6 produced...
Recently, solution-processed hybrid halide perovskite has emerged as promising materials for advanced optoelectronic devices such photovoltaics, photodetectors, light emitting diodes and lasers. In the mean time, all-dielectric metasurfaces with high-index have attracted attention due to their low-loss high-efficient optical resonances. Because of its tunable by composition band gap in visible frequencies, organolead could serve a powerful platform realizing high-index, metasurfaces....
Hybrid organic–inorganic lead halide perovskites have attracted much attention in the field of optoelectronic devices because their desirable properties such as high crystallinity, smooth morphology, and well-oriented grains. Recently, it was shown that thermal nanoimprint lithography (NIL) is an effective method not only to directly pattern but also improve crystallographic orientations annealed perovskite films. However, underlining mechanisms behind positive effects NIL on material been...
Transition metal dichalcogenides (TMDs) have attracted intensive attention due to their atomic layer-by-layer structure and moderate energy bandgap. However, top-gated transistors were only reported in a limited number of research works, especially with high-k gate dielectric that are thinner than 10 nm because dielectrics difficult deposit on the inert surface sulfide-based TMDs. In this work, authors fabricated characterized top-gated, few-layer MoS2 an 8 HfO2 dielectric. The show cleaning...
We report a directly patterned perovskite distributed feedback (DFB) resonator and show narrow amplified spontaneous emission (ASE) at pump powers as low 0.1 W/cm2 under continuous-wave (CW) optical pumping conditions room temperature. Compared to the pristine thin film photoluminescence spectrum, 16-fold reduction in linewidth MAPbI3 DFB cavity was observed. The direct nanostructuring of perovskites achieved by thermal nanoimprint lithography. Our findings pave way toward realizing CW...
Metal halide perovskites have emerged as promising gain materials for on-chip lasers in photonic integrated circuits. For these to become commercially relevant economical light sources, a clear onset of quasi-continuous wave (quasi-CW) and, eventually, continuous (CW) lasing at room temperature or Peltier-cooling accessible temperatures from directly patterned perovskite cavities is critical milestone that must be achieved. Herein, through patterning with nanoimprint lithography and...
This paper introduces a novel electrode structure designed to enhance electric field uniformity in radio frequency heating applications, such as food processing. The proposed 3-phase circular structure, the top electrode, consists of innermost, middle, and outermost electrodes, with each supplied voltage different phase. By utilizing relative phase differences between distribution bottom electrodes can be effectively modified apply uniform on sample. A 3D computational simulation model was...
Perovskite light-emitting devices have drawn considerable attention for their favorable optoelectronic properties. High carrier mobilities make perovskites excellent candidates as host materials in electroluminescent devices, but yet to be brought full potential this role. To achieve high performance a simple single-layer device, we employed CsPbBr3 perovskite and novel ionic iridium complex guest along with polyelectrolyte demonstrate efficient electrochemical cells (PeLECs). For an optimal...
Spherical semiconductor nanoplatelets, known as quantum shells (QSs), have captured significant interest for their strong suppression of Auger recombination, which leads to long multiexciton lifetimes and wide optical gain bandwidth. Yet, the realization benefits associated with lasing regime using a suitably designed photonic cavity remains elusive. Here, we demonstrate broadly tunable from close-packed films CdS/CdSe/CdS QSs deposited over nanopillar arrays on Si substrates. Wide spectral...
Microstructural properties of wormlike micelles (WLMs), which are employed in characterizing the system to predict rheological properties, have long been obtained via elusive experiments such as small-angle neutron scattering. Hence, this work, a framework explicitly obtain from macroscopic rheology measurements was developed. Specifically, parameters mesoscopic pointer-based algorithm, can linear WLMs were with aid multi-scale multi-recommendation (MSMR) batch Bayesian optimization (BO)...
Abstract Solution‐processed organic–inorganic metal halide perovskites have recently attracted tremendous attention in the photodetector community due to their excellent optoelectronic properties and facile fabrication. The main challenge perovskite photodetectors (PSPDs) is achieve high responsivity fast speed simultaneously. In this work, overcome by employing a directly patterned nanograting methylammonium lead iodide (MAPbI 3 ) film metal‐semiconductor‐metal (MSM) PSPD on interdigitated...
A special class of anisotropic media, hyperbolic metamaterials and metasurfaces (HMMs), has attracted much attention in recent years due to its unique abilities manipulate engineer electromagnetic waves on the subwavelength scale. Because all HMM designs require metal dielectric composites, unavoidable loss at optical frequencies inspired development active HMMs, where gain materials is incorporated compensate loss. Here, we experimentally demonstrate an type II that operates vacuum...