Sung-Wook Kim (김성욱)
Sung-Wook Kim (김성욱)
Post Doctoral
Post Doctoral
Photoelectrochemical (PEC) water splitting is an eco-friendly technology that converts solar energy into hydrogen. The photoanode consisting of the PEC system plays the role of generating H2O and O2 through oxygen evolution reaction (OER) under irradiation of a broad spectrum of sunlight.
A typically n-type semiconducting photoanode is immersed in an electrolyte that contains a redox couple(H2O/O2).
Solar Desalination is a promising eco-friendly and inexpensive way to obtain fresh water from sea water utilizing solar energy. This technology has attractive advantages as it combines the most abundant resources on Earth: water and solar energy.
As evaporation is a surface phenomenon, solar desalination is based on interfacial evaporation principle using photo-absorber which is same to natural evaporation.
Zinc-Ion Batteries are a type of rechargeable battery that uses zinc ions as the charge carriers.
They have emerged as a promising alternative to traditional batteries due to their numerous advantages such as safety, high capacity of Zn (820 mAh/g), non-toxicity, and easy processibility, abundant raw material resources, low cost.
Hybrid Supercapacitors are energy storage devices that combine the energy storage capability of batteries with the power delivery capability of supercapacitors. They offer a high energy density, rapid charging and discharging, long cycle life, maintenance-free operation, and safer operability.
These features make them ideal for a wide range of applications, including those requiring quick bursts of power, long-lasting power sources, and those where safety is a concern.
Improving semiconductor integrated circuit's performance by reducing critical dimensions and implementing high-resolution patterns is entirely dependent on the resolution limit of lithography circuit line width of semiconductors are getting shorter and higher resolution patterns are required.
Extreme Ultra Violet (EUV) lithography is the promising technique of next-generation semiconductors that can overcome this problem. However, existing organic chemically amplified resists have limits because of poor pattern transfer and pattern collapse, Line width roughness deterioration due to photon stochastic and acid stochastic in EUV state.
Therefore, the development on organic-inorganic hybrid cluster PR with high photon adsorption and moderate etch selectivity is needed for EUV lithography.
Graphene is a material composed of pure carbon atoms, arranged in a regular hexagonal pattern. Graphene can be described as a one-atom thick layer of the mineral graphite (many layers of graphene stacked together effectively form crystalline flake graphite). It has drawn a lot of attention due to its great properties such as high optical transmittance, excellent electrical conductivity, high flexibility, and large theoretical surface area, and great mechanical stability.
Graphene is applied in various ways, such as touch panels, flexible displays, high-efficiency solar cells, heat dissipation films, coating materials, ultra-thin speakers, secondary battery electrodes.