A5069639294- Advanced Sensor and Energy Harvesting Materials
- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
- Nanomaterials and Printing Technologies
- Graphene research and applications
- Supercapacitor Materials and Fabrication
- Advanced Photocatalysis Techniques
- ZnO doping and properties
- Thin-Film Transistor Technologies
- Nanowire Synthesis and Applications
- 2D Materials and Applications
- Green IT and Sustainability
- Copper-based nanomaterials and applications
- Electrocatalysts for Energy Conversion
- Nanofabrication and Lithography Techniques
- Carbon and Quantum Dots Applications
- Silicon Nanostructures and Photoluminescence
- Quantum and electron transport phenomena
- Dyeing and Modifying Textile Fibers
- Electrochemical sensors and biosensors
- Textile materials and evaluations
- Chalcogenide Semiconductor Thin Films
- Luminescence and Fluorescent Materials
Myongji University
2021-2025
University of Cambridge
2019-2023
Gwangju Institute of Science and Technology
2020-2021
Institute for Basic Science
2015-2020
Sungkyunkwan University
2013-2018
Suwon Research Institute
2015
In recent, highly transparent and flexible, two-dimensional (2D) graphene oxide (GO) nanosheet has been paid attention for various applications. Due to an existence of a large amount oxygen functional groups, the single 2D GO insulating, transparent, dispersible in eco-friendly water hydrophilic property that strong adhesion surface, which will be best candidate use over-coating layer (OCL) protecting conductive nanowire based indium-free film (TCF). The ultrathin adhesive OCL is expected...
Smart textiles consist of discrete devices fabricated from-or incorporated onto-fibres. Despite the tremendous progress in smart for lighting/display applications, a large scale approach display system with integrated multifunctional traditional textile platforms has yet to be demonstrated. Here we report realisation fully operational 46-inch consisting RGB fibrous LEDs coupled fibre that are capable wireless power transmission, touch sensing, photodetection, environmental/biosignal...
Many studies have accompanied the emergence of a great interest in flexible or/and stretchable devices for new applications wearable and futuristic technology, including human-interface devices, robotic skin, biometric optoelectronic devices. Especially, nanodimensional materials enable flexibility or stretchability to be brought based on their dimensionality. Here, emerging field is briefly introduced using silver nanowires graphene, which are famous nanomaterials use transparent conductive...
A strong electrostatic MV2+-GQD nanocomposite provides an electrolyte-free flexible electrochromic device wih high durability. The positively charged MV2+ and negatively GQD are strongly stabilized by non-covalent intermolecular forces (e.g., interactions, π–π stacking cation-π electron interactions), eliminating the need for electrolyte. An fabricated from GQD-supported exhibits stable performance under mechanical thermal stresses. As a service to our authors readers, this journal...
Recently, silver nanowires (AgNWs) have attracted considerable interest for their potential application in flexible transparent conductive films (TCFs). One challenge the commercialization of AgNW-based TCFs is low conductivity and stability caused by weak adhesion forces between AgNWs substrate. Here, we report a highly bendable, conductive, AgNW film, which consists an underlying poly(diallyldimethyl-ammonium chloride) (PDDA) composite bottom layer top layer-by-layer (LbL) assembled...
Abstract Perovskite quantum dot (QD) light‐emitting diodes (PeLEDs) are ideal for next‐generation display applications because of their excellent color purity, high efficiency, and cost‐effective fabrication. However, developing a technology high‐resolution multicolor patterning perovskite QDs remains challenging, owing to the chemical instability these materials. To overcome issues, in this work, generation surface defects is prevented by controlling ligand‐binding kinetics using stable...
An integrated textile electronic system is reported here, enabling a truly free form factor via manufacturing integration of fiber-based components. Intelligent and smart systems require freedom factor, unrestricted design, unlimited scale. Initial attempts to develop conductive fibers electronics failed achieve reliable performance required for industrial-scale technical textiles by standard weaving technologies. Here, we present with functional one-dimensional devices, including fiber...
Although there are numerous reports of high performance supercapacitors with porous graphene, few to control the interlayer gap between graphene sheets conductive molecular linkers (or pillars) through a π-conjugated chemical carbon–carbon bond that can maintain conductivity, which explain enhanced capacitive effect supercapacitor mechanism about accessibility electrolyte ions. For this, we designed molecularly gap-controlled reduced oxides (rGOs) via diazotization three different phenyl,...
Recently, Ag nanowires (AgNWs) has had a great interest as conducting material for flexible and transparent devices, but it still shows several problems such the ultimate detachment of AgNWs from substrate high contact resistance on AgNW junctions. Therefore, novel concept to enhance permanent closed attachment by silane modification polydimethylsilaoxane (PDMS) well known stretchable film with extremly low adhesive is suggested. According this experiment, higher sigma (σ)‐donating ability...
Recently, perovskite quantum dots (QDs) have attracted intensive interest due to their outstanding optical properties, but extremely poor chemical stability hinders the development of high-performance QD-based light-emitting diodes (PeLEDs). In this study, chemically stable SiO2-coated core–shell QDs are prepared fabricate all-solution-processed PeLEDs. When SiO2 shell thickness increases, is dramatically improved, while charge injection efficiency significantly decreased, which becomes...
Abstract The emergence of stretchable devices that combine with conductive properties offers new exciting opportunities for wearable applications. Here, a novel, convenient and inexpensive solution process was demonstrated to prepare in situ silver (Ag) or platinum (Pt) nanoparticles (NPs)-embedded rGO hybrid materials using formic acid duality the presence AgNO 3 H 2 PtCl 6 at low temperature. reduction can convert graphene oxide (GO) simultaneously deposit positively charged metal ion NP...
We introduce a facile method to prepare an n-type reduced graphene oxide field effect transistor at room temperature via typical Benkeser reduction using lithium and ethylenediamine.
Abstract A band gap tuning of environmental-friendly graphene quantum dot (GQD) becomes a keen interest for novel applications such as photoluminescence (PL) sensor. Here, the GQD, hexafluorohydroxypropanyl benzene (HFHPB) group acted receptor chemical warfare agent was chemically attached on GQD via diazonium coupling reaction HFHPB salt, providing new HFHPB-GQD material. With help electron withdrawing group, energy widened and its PL decay life time decreased. As designed, after addition...
A simulation model of electrical percolation through a three-dimensional network curved CNTs is developed in order to analyze the electromechanical properties highly stretchable fiber strain sensor made CNT/polymer composite. Rigid-body movement within polymer matrix described analytically. Random arrangements composite are generated by Monte-Carlo method and union-find algorithm utilized investigate percolation. Consequently, strain-induced resistance change curves obtained wide range In...
One-dimensional (1D) vertical nitrides are highly attractive for light-emitting diode (LED) applications because they useful overcoming the drawbacks of conventional GaN planar structures. However, internal quantum efficiency (IQE) multi-quantum-well (MQW) nanowire (NW) LEDs, typical 1D structures, is still too low to replace standard LEDs. Here, we report a phenomenon light amplification from core–shell InGaN/GaN NW LEDs by incorporating graphene dots (GQDs). The photoluminescence (PL) and...
The new matrix-type ligand system enhances charge carrier transport between particles and passivates defects on particle surfaces by establishing a band-like state.
A novel, nanoscale, thickness-controlled, elastic graphene oxide–polydiallyldimethylammonium chloride (GO-PDDA) film using a layer-by-layer technique on silver nanowires and flexible substrate is reported. Micro- nanoscale wear flexibility depending the thickness and/or nature of overcoating layer demonstrate high mechanical stability with PDDA inserted layer.
Abstract The development of flexible displays for wearable electronics applications has created demand high‐performance quantum dot (QD) light‐emitting diodes (QLEDs) based on QD core@shell structures. Emerging indium phosphide (InP)‐based QDs show promise as lighting material in the field optoelectronics because they are environmentally friendly material, can be produced a cost‐effective manner, and capable tunable emission. While efforts have been made to enhance performance InP‐based...
Large-scale printed InP RGB quantum dot (QD) light emitting diodes (QLEDs) are realised by an air-processable and stable ink with a photoinitiator (PI) mediating cross-linkage between eco-friendly QDs for next generation self-emissive display.
Inkjet-printed photodetectors have gained enormous attention over the past decade. However, device performance is limited without postprocessing, such as annealing and UV exposure. In addition, it difficult to manipulate surface morphology of printed film using an inkjet printer because options low viscosity ink solutions. Here, we employ a concept involving control inkjet-printed via modulation cosolvent vapor pressure tension for creation high-performance ZnO-based photodetector on...
Perovskite quantum dots (QDs) have been extensively studied as emissive materials for next-generation optoelectronics due to their outstanding optical properties; however, structural instabilities, specifically those of red perovskite QDs, are critical obstacles in realizing operationally reliable QD-based optoelectronic devices. Accordingly, herein, we investigated the sequential degradation mechanism QDs upon exposure an electric field. Via electrical and chemical characterization,...