KOSEN 한인과학기술자네트워크

1. Interface Control for Quantum-Dot- and Dye- Sensitized Solar Cells: We design the interfacial nanostructures of quantum-dot- and dye- sensitized solar cells for improving the power-conversion efficiency. Another approach for engineering the photovoltaic properties of semiconductor nanocrystals includes coupling with surface plasmons in metallic nanostructures, by the oscillation of the charge density of conduction electrons. 2. Photoluminescence of Nanomaterials: Semiconductor nanoparticles with diameters in the range of 1 to 20 nm exhibit unique physical properties that give rise to many potential applications. To further improve the luminescent quantum efficiency and photovoltaic power-conversion efficiency, surface passivation and surface plasmon are utilized with controlled nanostructures. Nanostructured Electrodes for Li-Ion Batteries 3. We are working to design the next-generation energy-storage technology, imagining a world in which batteries for a variety of applications are designed from abundant, cheap, and safe electrode materials. Our interests lie on the physical/chemical phenomena at the interface between the electrode and electrolyte, and we also aim to enhance the electrochemical properties by synthesizing controlled morphologies of nanostructures. 4. Nanostructured Electrodes for Fuel Cells Our research has been focused on designing the catalyst nanostructures for fuel cell which is one of the promising energy-conversion systems due to their high-energy efficiency, zero emission, low-temperature operation, etc. We aim to develop metal-semiconductor (or nanoporous insulator) nanocomposite catalysts for enhancing the onset potential and reducing the amount of Pt loading.