A5101418637- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Luminescence and Fluorescent Materials
- Conducting polymers and applications
- Advanced Sensor and Energy Harvesting Materials
- Reservoir Engineering and Simulation Methods
- Hydraulic Fracturing and Reservoir Analysis
- Fluid Dynamics and Mixing
- Green IT and Sustainability
- Drilling and Well Engineering
- Hydrocarbon exploration and reservoir analysis
- Enhanced Oil Recovery Techniques
- Rocket and propulsion systems research
- Nanocluster Synthesis and Applications
- Oil and Gas Production Techniques
- Advanced Computing and Algorithms
- Non-Invasive Vital Sign Monitoring
- Catalytic Cross-Coupling Reactions
- Molecular Junctions and Nanostructures
- Recycling and Waste Management Techniques
- Pickering emulsions and particle stabilization
- Photodynamic Therapy Research Studies
- Image and Video Quality Assessment
- Advanced Materials and Mechanics
- Optical Imaging and Spectroscopy Techniques
Korea Advanced Institute of Science and Technology
2019-2025
Abu Dhabi National Oil (United Arab Emirates)
2022
Louisiana State University Agricultural Center
2014-2022
Daejeon University
2020
Government of the Republic of Korea
2020
Kootenay Association for Science & Technology
2020
Louisiana State University
2015-2019
Texas A&M University
2017
Abstract Graphene quantum dots (GQDs) have attracted great attention as next‐generation luminescent nanomaterials due to the advantages of a low‐cost process, low toxicity, and unique photoluminescence (PL). However, in solid‐state, strong π−π stacking interactions between basal planes GQDs lead aggregation‐caused PL quenching (ACQ), which impedes practical application light‐emitting devices. Here, surface functionalized (F‐GQDs) by polyhedral oligomeric silsesquioxane (POSS), poly(ethylene...
Boron-based compounds exhibiting a multiresonance thermally activated delayed fluorescence are regarded promising as narrowband blue emitter desired for efficient displays with wide color gamut. However, their planar nature makes them prone to concentration-induced excimer formation that broadens the emission spectrum, making it hard increase concentration without raising CIE y coordinate. To overcome this bottleneck, we here propose o-Tol-ν-DABNA-Me, wherein sterically hindered peripheral...
High-energy photons arising from the UV component of solar spectrum are considered as a primary cause photoinduced degradation observed in organic cells (OSCs). We herein demonstrate scheme harvesting these high-energy via down-conversion (UVDC) layer embedded thin polymeric substrates an effective strategy for simultaneously enhancing efficiency and improving photostability OSCs. Transparent UV-curable photopolymer resin (NOA 61, Norland, Inc.) is employed to prepare polymer substrate...
Abstract Deep‐red (DR)‐to‐near‐infrared (NIR) phosphorescent organic light‐emitting diodes (OLEDs) have potentials for application in various fields ranging from phototherapy to sensing. Accordingly, herein, phenylpyridazine‐based bidentate ligands are synthesized and subsequently utilized the preparation of dinuclear Pt(II) complexes ( 1 – 6 ). The molecular structures 3 is investigated by single‐crystal X‐ray diffraction, results suggest that these substantially shortened Pt···Pt distances...
Abstract Near-infrared organic light-emitting diodes (NIR OLEDs) with heavy metals are regularly reported due to the advantages of their various applications in healthcare services, veil authentication, and night vision displays. For commercial applications, it is necessary look at radiance capacity (RC) instead because power consumption. However, recent papers still only simple high performance do not device from point view RC. To overcome this hurdle, we designed Ir(III)-based heteroleptic...
Phototherapeutics has shown promise in treating various diseases without surgical or drug interventions. However, it is challenging to use inner-body applications due the limited light penetration depth through skin. Therefore, we propose an organic light-emitting diode (OLED) catheter as effective photobiomodulation (PBM) platform useful for tubular organs such duodenums. A fully encapsulated highly flexible OLED mounted over a round columnar structure, producing axially uniform...
Abstract Stretchable organic light-emitting diodes (OLEDs) have emerged as promising optoelectronic devices with exceptional degree of freedom in form factors. However, stretching OLEDs often results a reduction the geometrical fill factor (FF), that is ratio an active area to total area, thereby limiting their potential for broad range applications. To overcome these challenges, we propose three-dimensional (3D) architecture adopting hidden serves dual role both emitting and interconnector....
Triarylboron emitters with secondary perfluoro acceptors display strong thermally activated delayed fluorescence (TADF) high PLQYs up to 100%. TADF-OLEDs the achieve a EQE of 29.9%, as well an ultrahigh PE 123.9 lm W<sup>−1</sup>.
The design of robust boron acceptors plays a key role in the development boron-based thermally activated delayed fluorescence (TADF) emitters for realization efficient and stable blue organic light-emitting diodes (OLEDs). Herein, we report set donor (D)–acceptor (A)-type TADF compounds (1–3) comprising triply bridged triarylboryl acceptors, so-called B-heterotriangulenes, which differ depending on identity one bridging groups: methylene (1), dimethylmethylene (2), or oxo (3). X-ray crystal...
Charge carrier confinement in nanocrystals is an effective route to enhance luminescence efficiency of metal halide perovskites. However, difficulty handling surface ligands colloidal perovskite and the defective processed limit radiative stability nanocrystalline films. We report a novel approach fabricate highly luminescent polymorphic formamidinium lead tri-iodide (FAPbI3) The cubic are formed situ by kinetic controlled solid-state phase conversion hexagonal polymorph. nanocrystal benign...
The pulse oximeter (PO) is an essential healthcare sensor that monitors the heart rate and blood oxygen level. With emergence of wearable form factors, its use rapidly expanding from applications in clinical environments to fitness, daily activities, point-of-care applications. However, relatively high power consumption commercial POs has been obstacle applying them wearables, which generally have a limited on-board source. In this work, we propose hybrid reflection-type (R-type) PO adopts...
Rigid naphthalene benzimidazole (NBI) based ligands (L1 and L2) are synthesized utilized to make deep red phosphorescent cyclometalated iridium(III) complexes ([Ir(NBI)2(PyPzCF3)] (1) [Ir(DPANBI)2(PyPzCF3)] (2)). Complexes 1 2 prepared from the reaction of L1/L2 with aid ancillary (PyPzCF3, 2-(3-(trifluoromethyl)-1H-pyrazol-5-yl)pyridine) in a two step method. The characterized by analytical spectroscopic methods, as well X-ray diffraction for 1. These show strong emission range 635–700 nm...
Summary An experimental and numerical investigation is presented in this study to verify the accuracy of wellbore flow models applied worst–case–discharge (WCD) calculations. Wellbore often used WCD calculations show errors more than 100% when compared data for large–diameter pipes. However, low gas/liquid ratios, there a reasonable agreement between simulation results all tested, with lower 10%. This uses comparison provide guidance on how improve these correlations proposes use obtain...
We report the impact of boron acceptors on thermally activated delayed fluorescence (TADF) properties ortho-donor-appended triarylboron compounds. Different boryl acceptor moieties, such as 9-boraanthryl (1), 10H-phenoxaboryl (2), and dimesitylboryl (BMes2, 3) groups have been introduced into an ortho donor (D)-acceptor (A) backbone structure containing a 9,9-diphenylacridine (DPAC) donor. X-ray crystal diffraction NMR spectroscopy evidence presence steric congestion around atom along with...
While organic light‐emitting diodes (OLEDs) have seen huge success as light sources in high‐end displays, efforts are being made to extend their spectral coverage beyond the visible region. Among such endeavors, development of ultraviolet (UV) OLEDs is particularly interest due unique applications UV a variety areas security, sterilization, phototherapy, etc. However, that emit very challenging realize limitations high‐energy‐induced molecular instability, rarity adequate emitting layers,...
Abstract An experimental investigation was carried out to investigate the behavior of gas-liquid flows in a large-diameter pipe with high flow-rates. The objectives are experimentally evaluate two-phase vertical pipes large diameter and collect information verify accuracy wellbore flow models applied Worst-Case Discharge (WCD) calculations. correlations developed for small diameters, used on Worst-Case-Discharge calculations, show errors more than 100% compared data pipes. However, low...
In this study, we evaluated the storage capacity of carbon dioxide injection into depleted reservoirs Donghae-1 gas field, which is being promoted as Korea's first Carbon Capture and Storage (CCS) demonstration project. A new reservoir model for field was constructed using existing seismic well data Donghae through simulations were performed according to various scenarios. As a result simulation, it found that has safe 400,000 tons per year up about 28 years; initial target rate CCS project...
Abstract Numerous laboratory and field tests reveal that foam can effectively control gas mobility improve sweep efficiency, if correctly designed. It is believed there a significant gap between small laboratory-scale experiments large field-scale because of two main reasons: (i) typical flow are conducted in linear systems, while EOR processes performed radial (or spherical partly) systems; (ii) through the complicated in-situ lamella creation/coalescence mechanisms non-Newtonian behavior,...