A5042054457- ZnO doping and properties
- TiO2 Photocatalysis and Solar Cells
- Perovskite Materials and Applications
- Advanced Photocatalysis Techniques
- Luminescence Properties of Advanced Materials
- Gas Sensing Nanomaterials and Sensors
- Thin-Film Transistor Technologies
- Transition Metal Oxide Nanomaterials
- Ga2O3 and related materials
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Seismic Imaging and Inversion Techniques
- Copper-based nanomaterials and applications
- Advanced Sensor and Energy Harvesting Materials
- Microwave Dielectric Ceramics Synthesis
- Advancements in Battery Materials
- Seismic Waves and Analysis
- Analytical Chemistry and Sensors
- Solid-state spectroscopy and crystallography
- Supercapacitor Materials and Fabrication
- Organic Light-Emitting Diodes Research
- Semiconductor materials and interfaces
- Acoustic Wave Resonator Technologies
- Advancements in Solid Oxide Fuel Cells
Gachon University
2015-2024
SK Group (South Korea)
2017-2020
Hanyang University
2010-2016
Anyang University
2016
Kyungdong University
2002-2012
Sungkyunkwan University
2009-2012
Kyungnam University
2007-2011
Yonsei University
1995-1997
Abstract Efficiency of dye-sensitized solar cells [DSSCs] was enhanced by combining the use TiO 2 nanotubes [TNTs] and nanoparticles. TNTs were fabricated a sol-gel method, powders produced through an alkali hydrothermal transformation. DSSCs constructed using nanoparticles at various weight percentages. coated onto FTO glass screen printing method. The ruthenium(II) (N-719) electrolyte (I 3 /I - ) dyes. crystalline structure morphology characterized X-ray diffraction scanning electron...
The replacement of oxide semiconducting TiO₂ nano particles with one dimensional nanotubes (TNTs) has been used for improving the electron transport in dye-sensitized solar cells (DSSCs). Although use structure provides enhanced photoelectrical performance, it tends to reduce adsorption dye on surface due decrease area. To overcome this problem, we investigate effects TiCl₄ treatment DSSCs which were constructed composite films made nanoparticles and TNTs. find optimum condition TNTs...
The exploration of novel polymers for temperature sensing with high sensitivity has attracted tremendous research interest. Hence, we report a polystyrene-coated optical fiber sensor sensitivity. To enhance the sensitivity, flat, thin, smooth, and air bubble-free polystyrene was coated on edge surface single-mode fiber, where coating thickness varied based solution concentration. Three thicknesses layer were obtained as 2.0, 4.1, 8.0 μm. 2.0 μm thick exhibited highest 439.89 pm °C-1 in range...
In this study, a perovskite-based mixed cation/anion ultraviolet photodetector with an added halide material is fabricated using perovskite combined ABX_3 structure. Mixed thin films of MAPbI3/FABr are manufactured through relatively simple solution process and employed as light-absorption layers. the produced film, SnO2–sodium dodecylbenzenesulfonate acts electron transport layer spiro-OMeTAD hole injection layer. Compared to single perovskite, device exhibits phase stability optoelectronic...
The phenomenon of color change in a particular material caused by an electrochemical reaction is called "electrochromism." Since the discovery electrochromic tungsten oxide, amorphous WO3 most widely studied material. Until now, remains promising candidate for devices. Electrochromic devices can switch between two optical states (colored/bleached) injection/extraction ions and electrons, based on modification transmittance reflectance that are induced applied external voltage. In this study,...
Photodetectors convert optical signals into electrical and demonstrate application potential in various fields, such as communication, image detection, environmental monitoring, optoelectronics. In this study, a mixed cation-halide perovskite-based ultraviolet C photodetector was fabricated using solution process. The higher the mobility of perovskite carrier, which is one factors affecting performance electronic power devices, better carrier diffusion. on/off ratio responsivity indicate...
The WO 3- x thin films were prepared on indium tin oxide (ITO) coated glass at 0.7 oxygen flow ratio [O 2 /(Ar+O )] using the facing targets sputtering (FTS) system room temperature. In order to obtain annealing effect, as-deposited annealed temperatures of 100, 200, 300, 400, and 500 °C for 1 h in open air. structural properties film measured an X-ray diffractometer. up 300 indicated amorphous properties, while those above 400 crystalline properties. electrochemical optical cyclic...
We have investigated the electrical, optical, and structural properties of p-type nitrogen (N)-doped Cu2O thin films prepared at various gas flow rates for application in heterojunction solar cells. The N-doped were fabricated by facing-target reactive sputtering. hole concentration was affected N2 rate. With increasing rate from 0 to 0.5 sccm, mobility increased sharply. resistivity, concentration, a 4 sccm 1.9 Ω·cm, 2.0 × 1018 cm−3, 3.4 cm2·V−1·s−1, respectively. showed Cu2O(111) Cu2O(200)...
TiO2 nanotube arrays are very attractive for dye-sensitized solar cells (DSSCs) owing to their superior charge percolation and slower recombination. Highly ordered, vertically aligned have been fabricated by a three-step anodization process. Although the use of one-dimensional structure provides an enhanced photoelectrical performance, smaller surface area reduces adsorption dye on surface. To overcome this problem, we investigated effect DSSCs constructed with multilayer photoelectrode made...
We investigated the structural modification of solution-processed nanocrystalline InGaO films via high-pressure annealing and fabricated thin-film transistors. The grain size annealed in presence oxygen under high pressure was significantly changed compared without ambient. O1s XPS peak distribution at 350 °C showed a similar to that non-pressure film 500 °C. process promoted elimination organic residues dehydroxylation metal hydroxide (M–OH) complex. confirmed improved device performance...