A5067672943- Analytical Chemistry and Sensors
- Advanced Chemical Sensor Technologies
- Gas Sensing Nanomaterials and Sensors
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Nanowire Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Advanced Thermoelectric Materials and Devices
- Advanced Fiber Optic Sensors
- Ga2O3 and related materials
- ZnO doping and properties
- Olfactory and Sensory Function Studies
- GaN-based semiconductor devices and materials
- Biochemical Analysis and Sensing Techniques
- Thin-Film Transistor Technologies
- Electrochemical Analysis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Analog and Mixed-Signal Circuit Design
- Organic Light-Emitting Diodes Research
- Electrospun Nanofibers in Biomedical Applications
- Carbon and Quantum Dots Applications
- Pigment Synthesis and Properties
- Advanced biosensing and bioanalysis techniques
- Electrochemical sensors and biosensors
Korea Institute of Materials Science
2023
Kyungpook National University
2012-2020
Abstract Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is most commonly used as an anode buffer layer in bulk-heterojunction (BHJ) polymer solar cells (PSCs). However, its hygroscopic and acidic nature contributes to the insufficient electrical conductivity, air stability restricted photovoltaic (PV) performance for fabricated PSCs. In this study, a new multifunctional additive, 2,3-dihydroxypyridine (DOH), has been PEDOT: PSS obtain modified properties PSS@DOH achieve...
In this paper, we propose an AlGaN/GaN high electron mobility transistor (HEMT)-based biosensor for the detection of C-reactive protein (CRP) using a null-balancing circuit. A circuit was used to measure output voltage sensor directly. The proposed varied by antigen-antibody interactions on gate surface due CRP charges. HFET-based with applied shows that can be detected in wide range concentrations, varying from 10 ng/mL 1000 ng/mL. X-ray photoelectron spectroscopy carried out verify...
We propose a solution-processable ultraviolet (UV) photodetector with pn-heterojunction hybrid photoactive layer (HPL) that is composed of poly-n-vinylcarbazole (PVK) as p-type polymer and ZnO nanoparticles (NPs) an n-type metal oxide. To observe the effective photo-inducing ability UV photodetector, we analyzed optical electrical properties HPL which controlled by doping concentration NPs in PVK matrix. Additionally, confirmed dominantly depend on from UV-vis absorption photoluminescence...
We have developed a multi-array side-polished optical-fiber gas sensor for the detection of volatile organic compound (VOC) gases. The coupled with polymer planar waveguide (PWG) provides high sensitivity to alterations in refractive index. PWG was fabricated by coating solvatochromic dye poly(vinylpyrrolidone). To confirm effectiveness sensor, five different sensing membranes were using dyes Reinhardt’s dye, Nile red, 4-aminophthalimide, 4-amino-N-methylphthalimide, and...
In bulk heterojunction polymer solar cells (BHJ-PSCs), poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonate) (PEDOT:PSS) is the most commonly used hole selective interlayer (HSIL). However, its acidity, hygroscopic nature, and use of indium tin oxide (ITO) etching can degrade overall photovoltaic performance air-stability BHJ-PSCs. Solvent engineering considered as a facile approach to overcome these issues. this work, we engineered HSIL using ethanol (ET) treated PEDOT:PSS...
In this paper, we propose interface engineering between cadmium selenide/zinc sulfide (CdSe/ZnS) quantum dots (QDs) as the emissive layer (EML) and ZnO nanocrystals (NCs) electron transport (ETL) for reducing potential barrier in QDs based light-emitting diode (QLED). The n-type NCs were effective confining charge to EML because of their wide band gap. synthesized using a modified sol-gel process applied ETL QLED. For comparison, standard QLED with Tris(8-hydroxyquinolinato)aluminium was...
In this paper, we demonstrate a simple strategy for the incorporation of gold nanodots (GNDs) into poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PSS) films, towards fabrication an efficient anode interfacial layer in order to improve performance bulk heterojunction (BHJ) solar cells that use blend poly(3-hexyl thiophene) and [6,6]-phenyl-C71 butyric acid methyl ester as organic active layer. We synthesized citrate-stabilized GNDs, with sizes range -20-30 nm, by initially blending...
In this paper, a biosensor based on gated lateral bipolar junction transistor (BJT) is proposed. The BJT can function as both metaloxide-semiconductor field-effect (MOSFET) and BJT. By using the self-assembled monolayer (SAM) method, C-reactive protein antibodies were immobilized floating gate of device sensing membrane. Through experiments, characteristics analyzed in study. According to results, it indicated that be successfully applied biosensor. Additionally, we found sensitivity varied...
In this paper, we propose a gated lateral bipolar junction transistor (GLBJT) that has cascade structure, resulting in improved sensing performance over conventional GLBJTs. The device can be operated (BJT) mode, metal-oxide-semiconductor field-effect (MOSFET) and hybrid MOSFET-BJT mode under input bias control. exhibits higher transconductance than of GLBJTs owing to the structure using pMOSFET. effect generated proposed is shown increase transconductance, results from two experiments [pH...
Lateral double-diffused metal-oxide semiconductors (LDMOSs) have applications in various devices. In this letter, the characteristics of a proposed sensor application based on an LDMOS incorporating floating gate are reported. Furthermore, possible device explored. addition to being applicable unmodified complementary metal- oxide-semiconductor process, layout our can be optimized for ion detection purposes. The sensitivity results across pH range 1-12 were approximately 9.01, 8.52, 8.73,...
We have developed an optical gas sensor for detection of volatile organic compounds (VOCs) gases. The side-polished fiber coupled with the polymer planar waveguide (PWG) which has high sensitive to change refractive index. PWG was fabricated by coating solvatochromic dye a polyvinyl pyrrolidone (PVP). system tested five-types VOCs different polarities VOC gases cause changes in effective index sensing membrane owing evanescent field coupling. According results, proposed showed sensitivity.
We propose an optical gas sensor using anodic aluminum oxide (AAO) and a graphene (GO) layer to detect hydrophilic gas. In the proposed sensor, GO reacts with induced cause change in refractive index of AAO surface, which can be optically detected by measuring reflected wave on surface device. By high reactivity gases owing reactors such as hydroxyl carboxyl groups, GO-coated AAO-based showed sensitivity 15 a.u./ppm for gas, dimethylamine low hydrophobic, toluene. The was fabricated second...
A benzene gas sensor was developed base on the gated lateral bipolar junction transistor (BJT) coupled with solvatochromic dye in this study. The BJT which combined a metal-oxide-semiconductor field effect (MOSFET) and used as main part of device. 4-amino-N-methylphthalimide (4-ANMP) kind charge-transfer (CT) characteristic fabricated surface device sensing membrane. Benzene target study results shows that proposed can be for detection successful.
The low conductive PEDOT:PSS is a common hole transfer layer in bulk heterojunction organic solar cells (BHJ-OSCs), which affects the performance of OSCs. Herein, we use an additive to improve conductivity PEDOT:PSS.