A5036695020- ZnO doping and properties
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Carbon and Quantum Dots Applications
- Graphene research and applications
- Advanced Memory and Neural Computing
- Copper-based nanomaterials and applications
- Gas Sensing Nanomaterials and Sensors
- Advancements in Battery Materials
- Advanced Sensor and Energy Harvesting Materials
- Thin-Film Transistor Technologies
- Supercapacitor Materials and Fabrication
- Ga2O3 and related materials
- Semiconductor materials and devices
- 2D Materials and Applications
- Organic Electronics and Photovoltaics
- Luminescence and Fluorescent Materials
- Advanced Photocatalysis Techniques
- GaN-based semiconductor devices and materials
- Perovskite Materials and Applications
- MXene and MAX Phase Materials
- Fullerene Chemistry and Applications
- Graphene and Nanomaterials Applications
- Nanocluster Synthesis and Applications
- Nanowire Synthesis and Applications
Korea University of Science and Technology
2014-2024
Korea Institute of Science and Technology
2014-2024
Hanyang University
2002-2014
Ultraviolet (UV) photodetectors were fabricated using the wet spin-coating for ZnO quantum dots (QDs) and transfer method graphene sheet. High-resolution transmission electron microscopy images showed that QDs uniformly distributed between voids of surface circumferences on layers. Current-voltage measurements UV photodetector at 300 K ratio photocurrent to dark current was about 1.1 × 104. The rise decay times approximately 2 1 s, respectively. photoresponse mechanisms are described basis...
In situ growth of ZnO quantum dots (QDs) on the surface multiwalled carbon nanotubes (MWCNTs) was realized via a mild solution-process method, which resulted in an improvement photoinduced charge separation and transport carriers to collecting electrode. The transfer efficiency significantly increased by more than 90% due conjugation QDs with MWCNTs, as confirmed photoluminescence measurements. Ultraviolet photovoltaic cells based at QD-MWCNT heterostructures were fabricated, their power...
We present data, which were obtained before bending and after bending, for the electrical bistabilities, memory stabilities, mechanisms of three-layer structured flexible bistable organic (BOM) devices, fabricated utilizing ultrathin graphite sheets (UGS) sandwiched between insulating poly(methylmethacrylate) (PMMA) polymer layers. The UGS formed by transferring (about 30 layers) using a simple spin-coating technique. Transmission electron microscopy (TEM) measurements performed to...
Polyethylenimine ethoxylated (PEIE)/monolayered quantum dots (QDs) play a multifunctional role as the electron transport layer and absorption layer, in addition to causing surface plasmon resonance effects, for improving photovoltaic performance. This leads power conversion efficiency increase of up 8.1% using PTB7 (poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]]):PC71BM ([6,6]-phenyl-C71-butyric acid...
In situ growth of ZnO quantum dots (QDs) on the surface multi-walled carbon nanotubes (MWCNTs) was presented, and their application in photovoltaic cells by using flexible polyethylene terephthalate substrates demonstrated. High-resolution transmission electron microscopy images revealed conjugation QDs with MWCNTs. Photoluminescence spectra indicated that charge transfer efficiency at QD–MWCNT heterojunctions above 90%, as confirmed time-resolved photoluminescence measurements....
The x-ray diffraction patterns, transmission electron microscopy images, and selected-area patterns for the ZnO∕Si heterostructures annealed at 900°C showed that orthorhombic ZnSiO3 nanoparticles were formed in amorphous layer between ZnO film Si substrate, resulting from interdiffusion substrate due to thermal treatment. Auger spectroscopy depth profiles demonstrated formation of Zn2xSi1−xO2, an interfacial layer. A mechanism embedded Zn2xSi1−xO2 is described on basis experimental results.