A5103273620- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Advanced Sensor and Energy Harvesting Materials
- Thin-Film Transistor Technologies
- Nanomaterials and Printing Technologies
- Luminescence and Fluorescent Materials
- Advanced Memory and Neural Computing
- Transition Metal Oxide Nanomaterials
- GaN-based semiconductor devices and materials
- Advancements in Battery Materials
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- 3D IC and TSV technologies
- Gas Sensing Nanomaterials and Sensors
- Advanced Chemical Sensor Technologies
- Semiconductor materials and devices
- Spectroscopy and Laser Applications
- Carbon Nanotubes in Composites
- Advanced Fiber Optic Sensors
- Ferroelectric and Negative Capacitance Devices
- solar cell performance optimization
- Advanced Battery Technologies Research
- Neuroscience and Neural Engineering
- Luminescence Properties of Advanced Materials
Chonnam National University Hospital
2023-2024
Chonnam National University
2017-2024
Korea Institute of Industrial Technology
2007-2020
Government of the Republic of Korea
2019
Karolinska Institutet
2019
Gwangju University
2019
Pukyong National University
2017-2018
Keimyung University
2017-2018
Georgia Institute of Technology
2017
Korea Photonics Technology Institute
2014-2015
The optical properties of dielectric-metal-dielectric (DMD) transparent electrodes are investigated from the perspectives organic light-emitting diodes (OLEDs). A joint experimental and theoretical study showed that characteristics OLEDs based on DMD can be widely tuned to fulfill requirements a target application through careful control microcavity effect, transmittance electrodes, correlation these two factors with emission spectra emitted materials. Upon variation structure,...
The poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) film is a promising material for electrodes, biomolecular sensor channels, and probes physiological signals because the electrical conduction of PEDOT:PSS tuned simply through electrochemical reaction with target analyte. However, forming specific morphology or nanostructure on thin films immersed in an aqueous solution still challenge. Herein, we report mechanism stepwise morphological change highly conductive layer...
Among various conductive polymers, the poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) film has been studied as a promising material for use transparent electrode and hole-injecting layer in organic optoelectronic devices. Due to increasing demand low-cost fabrication of light-emitting diodes (OLEDs), PEDOT:PSS employed top by using coating or lamination method. Herein, facile method is reported highly efficient polymer (PLEDs) based on laminated (LTE) consisting...
Recent advances in numerous biological applications have increased the accuracy of monitoring level biologically significant analytes human body to manage personal nutrition and physiological conditions. However, despite promising reports about costly wearable devices with high sensing performance, there has been a growing demand for inexpensive sensors that can quickly detect molecules. Herein, we present highly sensitive biosensors based on organic electrochemical transistors (OECTs),...
Abstract Carbon nanotubes (CNTs), owing to their superior electrical and mechanical properties, are a promising alternative nonmetallic electrically conducting materials. In practice, cellulose as low‐cost sustainable matrix has been used prepare the aqueous dispersion of cellulose‐CNT (C‐CNT) nanocomposites. However, compatibility with conventional solution‐processing structural rearrangement for improving conductivity yet be determined. Herein, straightforward route conductive composite...
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication the EditorNEXTVinyl-Type Polynorbornenes with Triarylamine Side Groups: A New Class of Soluble Hole-Transporting Materials for OLEDsJun Ha Park†, Changhun Yun‡, Myung Hwan Youngkyu Do*†, Seunghyup Yoo*‡, and Min Hyung Lee*§View Author Information† Department Chemistry, KAIST, Daejeon 305-701, Republic Korea‡ Electrical Engineering, Korea§ University Ulsan, Ulsan 680-749, Korea*Corresponding authors. E-mail: [email...
The soluble polynorbornene (P1) bearing 9,9′-(1,1′-biphenyl)-4,4′-diylbis-9H-carbazole (CBP) side groups was investigated as a host material for green emitters in phosphorescent OLED devices. vinyl addition polymerization of norbornene monomers using Pd(II) catalyst efficiently produces P1 combination with 1-octene chain transfer agent. exhibits high thermal stability decomposition (Td5 > 451 °C) and glass transition temperatures (Tg 361 °C). HOMO (ca. −5.5 eV) LUMO −2.1 levels the triplet...
We report on the fabrication of efficient inverted organic light-emitting diodes (IOLEDs) using pentacene films as an electron injection/transport layer between Al and Alq3 layers. These IOLED devices turn at 4.7 V exhibit a luminous efficiency 9.5 cd/A without any dopants or reactive metals. Analysis space-charge-limited characteristics electron-only ultraviolet photoelectron spectroscopy measurement metal/organic interfaces indicates that can be attributed partly to mobility is 102–104...
Over the past several years there have been substantial advancements in through glass via (TGV) technology. There is an excellent opportunity to leverage TGV technology and insulating properties of glass, address next generation needs for RF components. Multi-bands multi-standards with carrier aggregation WiFi GPS coexistence make front end more complicated. In order best-fit filtering solutions end, high-performance inductors capacitors are required. For inductors, drastic performance...
We fabricated a solution-processed semitransparent organic solar cell from transparent conductive polymer electrode. The top metal electrode was replaced with polymer, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS). advantage of using the PEDOT:PSS is that (OPV) can be solution process at plastic-compatible low temperature (<200°C). In addition, due to absence an opaque electrode, final OPVs exhibit semitransparency. transmittance (T) OPV adjusted by changing...
Laser treatment realizes highly conductive PEDOT:PSS transparent films (932 S cm<sup>−1</sup>), enabling selective doping and facile, fast patterning.
Highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PSS) films as transparent electrodes for organic light-emitting diodes (OLEDs) are doped with a new solvent 1,3-dimethyl-2-imidazolidinone (DMI) and optimized using post-treatment. The DMI dopedPSS show significantly enhanced conductivities up to 812.1 S cm(-1) . sheet resistance of thePSS is further reduced by various effect post-treatment on investigated shown reduce insulating PSS in the films. posttreatedPSS...
We have found that the emission spectrum of phosphors measured in powder state differs from for a single phosphor. When is adopted an optical simulation, simulated properties e.g., correlated color temperature, rendering index, and chromaticity coordinates, show remarkable discrepancy those fabricated LED package. However, significantly improved when low concentration phosphor silicone binder employed. suggest originates absorption Stokes shifted light by
We develop highly robust and stretchable conductive transparent electrodes based on silver nanowires (AgNWs) deposited functionalized chitosan biopolymer substrates. 11-aminounde-canoic acid is introduced as a surface modifier for enhancing the chemical bond. The chemically AgNW films achieve low sheet resistance of 12.2 ohm/sq with high transmittance 88.9%. In addition, alternating current-driven electroluminescent devices heaters have been fabricated AgNW/chitosan thin-films which can be...