A5101997510- Organic Electronics and Photovoltaics
- Thin-Film Transistor Technologies
- Semiconductor materials and devices
- Analytical Chemistry and Sensors
- Graphene research and applications
- Advanced oxidation water treatment
- Advanced battery technologies research
- Organic Light-Emitting Diodes Research
- GaN-based semiconductor devices and materials
- Electrocatalysts for Energy Conversion
- Conducting polymers and applications
- Nanomaterials and Printing Technologies
- Electrochemical Analysis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Advancements in Battery Materials
- Electrowetting and Microfluidic Technologies
- 2D Materials and Applications
- ZnO doping and properties
- Diamond and Carbon-based Materials Research
- Boron and Carbon Nanomaterials Research
- Marine Biology and Environmental Chemistry
- Electrohydrodynamics and Fluid Dynamics
- Analytical chemistry methods development
- RFID technology advancements
- Advancements in Semiconductor Devices and Circuit Design
Pohang University of Science and Technology
2013-2025
Seoul National University
2014-2018
Seoul Institute
2017
Government of the Republic of Korea
2017
Chungnam National University
2017
Seoul Women's University
2015
Pohang TechnoPark (South Korea)
2014
Polymer Research Institute
2014
Recently, black-colored TiO2 NTA (denoted as black NTA) fabricated by self-doping of with the amorphous phase led to significant success a visible-light-active photocatalyst. This enhanced photocatalytic activity is largely attributed higher charge carrier density an effect electrochemical resulting in optical absorbance and lower transport resistance. Nevertheless, potential for other applications, such supercapacitor oxidant-generating anode, has not been fully investigated. Here, we...
A novel electrochemical system comprising λ-MnO<sub>2</sub> and BDD is proposed for simultaneous recovery of lithium decomposition organic pollutants.
A facile spin-coating method in which a small percentage of the solvent additive, 1-chloronaphthalene (CN), is found to increase drying time during film deposition, reported. The field-effect mobility PDPPDBTE cast from chloroform–CN mixed solution 0.46 cm2 V-1 s-1. addition CN chloroform facilitates formation highly crystalline polymer structures. As service our authors and readers, this journal provides supporting information supplied by authors. Such materials are peer reviewed may be...
Tuning of the energetic barriers to charge transfer at semiconductor/dielectric interface in organic field-effect transistors (OFETs) is achieved by varying dielectric functionality. Based on this, correlation between magnitude energy barrier and gate-bias stress stability OFETs demonstrated, origin excellent device employing fluorinated dielectrics revealed. As a service our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may...
Organometal halide perovskites become important in the photovoltaic and light emitting devices due to compositional flexibility with AMX3 formula (A is a monovalent organic ammonium cation; M metal ion; X halogen atom), imposing significant demand develop synthetic route toward new types of nanocrystals. Although chemical pathways for nanoparticles were developed on basis reprecipitation method, poor control nucleation growth process results large size polydispersity that induces ambiguities...
We successfully accomplished the conformal growth of sp2-hybridized few-layer h-BN over an array Si-based nanotrenches with a 45 nm pitch and aspect ratio ∼7:1 by using pulsed-mode metal–organic chemical vapor deposition (MOCVD) method. Surface-sensitive X-ray absorption fine structure spectroscopy density functional theory calculations revealed that B–O bonds formed on noncatalytic SiO2 surface act as nucleation sites for subsequential formation mixed sp2- sp3-hybridized BON2 BN3 at very...
Here, we report a novel hybrid electrochemical desalination system synchronized with an oxidation process for the first time. As one of breakthroughs in systems, is demonstrated as strategy to overcome drawbacks systems associated difficulties anion adsorption/intercalation. This consists cation-selective battery material component, oxidant generating anode and exchange membrane that offers channel diffusion anions. During operation, cations are intercalated into material, reactions occur on...
With the goal of achieving high-performance electrically stable organic field-effect transistors (OFETs), we chemically graft a fluorinated polymer nanolayer onto polar oxide dielectric surfaces via simple and easy fabrication process in ambient air. The para-fluorine-thiol click reaction between poly(pentafluorostyrene) (PFS) mercaptopropyltrimethoxysilane is used to synthesize graftable (gPFS). surface characteristics gPFS-treated SiO2 dielectrics crystal structure grain growth overlying...
We present resistive switching (RS) behavior of few-layer hexagonal boron nitride (h-BN) mediated by defects and interfacial charge transfer. Few-layer h-BN is grown metal–organic chemical vapor deposition used as active RS medium in Ti/h-BN/Au structure, exhibiting clear bipolar fast characteristics about ∼25 ns without an initial electroforming process. Systematic investigation on microstructural the reveals that there are structural such homoelemental B–B bonds at grain boundaries...
Highly stable fluorine-rich polymer dielectrics were fabricated using cross-linked poly(3-(hexafluoro-2-hydroxyl) propyl) styrene (PFS), which shows excellent electrical stability, good adhesive surface properties, and wettability on deposited solution-processed materials. Solution-processed triethylsilylethynyl anthradithiophene (TES-ADT) could be onto the PFS to yield highly ordered crystalline structured films that did not delaminate. The field-effect mobilities as high 0.56 cm2 V−1 s−1,...
The receptor material (OA-GO)/polymeric semiconductor (F8T2) structure is newly introduced to active layer of OFET gas sensors and demonstrated have better sensing ability than a comparable device with polymer-only layer.
Peroxodisulfate (PDS, S2O82–) is one of the strong oxidants (E°[S2O82–/HSO4–] = 2.12 VNHE), which widely used for radical polymerization or wastewater treatment. In electrochemical PDS generation, its efficiency highly depends on •OH generating electrode materials. A boron-doped diamond (BDD) in generation very expensive prompting need new materials generation. This study reports self-doped TiO2 nanotube array electrodes (blue and black TNAs) are cheap effective a significant amount...
We successfully fabricated high performance bottom-contact organic field-effect transistors (OFETs) using silver nanowire (AgNW) network electrodes by spray deposition. The synthesized AgNWs have the dimensions of 40-80 nm in diameter and 30-80 μm length are randomly distributed interconnected to form a 3D hollow framework. networks, deposited coating, yield an average optical transmittance up 88% sheet resistance as low 10 ohm/sq. For source/drain OFETs with configuration, large contact at...
Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) is a promising electrode material for organic electronic devices due to its high conductivity, good mechanical flexibility, and feasibility of easy patterning with various printing methods. The work function PEDOT:PSS needs be increased efficient hole injection, the addition fluorine-containing has been reported increase PEDOT:PSS. However, it remains challenge print electrodes while simultaneously tuning their functions....
This study investigated how inert supporting electrolytes (SEs), which increase the electrical conductivity, affect electrochemical ozone production (EOP) on a boron-doped diamond (BDD) electrode. Regardless of SE species, EOP was suppressed about 60% in concentration 1 mM for conductivity is similar to that tap water compared deionized water. The H2O2, known be generated by combination , also suppressed. On other hand, formation not significantly affected presence SEs, an intermediate...
We investigated the influence of organic dielectric surfaces on electrical characteristics inorganic amorphous indium-gallium-zinc oxide (a-IGZO)-based thin film transistors (TFTs). To modify surface, various self-assembled monolayers and polymer films with different functional groups were introduced. Electrical measurements a-IGZO TFTs using surface-modified gate dielectrics revealed that threshold voltages shifted toward positive values as surface attract more electrons in films. These...
Photo and temperature cured polymer dielectrics could be fabricated on a gate-patterned glass, with two immiscible precursors, divinyltetramethyldisiloxane-bis(benzocyclobutene) (BCB precursor) poly(melamine-co-formaldehyde)acrylate (PMFA), which have excellent insulating properties, but show discernible dielectric constants polarities. On hydrophobic BCB-assisted PMFA blend (approximately 400 nm thick), organic field-effect transistors (OFET) complementary inverters were demonstrated using...