报 告 人：Prof. Jung-Ho Lee
Prof. Jung-Ho Lee received his BS from Hanyang University in 1987, and obtained his MS and Ph.D in Materials Science & Engineering from KAIST in 1989 and 1995 respectively. Jung-Ho Lee had been selected as the Senior Researcher in Hynix Semiconductor Inc., in the period of 1996-2003. From 2003, he has been selected as a Professor of Chemical Engineering at the Hanyang University at Ansan campus. His Research Interests include Nanostructured silicon solar cells for low-cost next-generation applications, High-efficiency device convergence between photovoltaic and thermoelectric devices, and Hydrogen production by photoelectrochemical conversion from semiconductor nanostructures. He has published more than 200 refereed journal papers in these research fields. From 2009, he has been selected as the Directors of Pioneer Research Center for Solar Thermal Conversion Nanodevices funded by Korean Ministry of Education, and Research Center for Next-Generation Thin Film Solarcells funded Korean Ministry of Knowledge Economy, respectively.
One attractive option for clean, renewable energy and reduced fossil fuel consumption is the cost-effective conversion of solar energy into electricity (or hydrogen) through solar cells (or water splitting) using semiconductor materials. During past decades, various inorganic semiconductors have been used as light absorbers or catalysts for these applications. The talk consists of four sections
1. Optimal design of nanostructured silicon for thin c-Si solar cells,
2. Kerf-free Wafering future silicon PV,
3. Silicon and Carbon for Solar Water splitting,
4. Thermovoltage-driven Solar electricity and hydrogen.
First two topics are associated with photovoltaic applications. Conventional wafer-based crystalline Si (c-Si) solar cells normally require a thick (~180m) wafer thickness for enough light absorption, which mainly caused to increase the production cost in solar cells. As a promising alternative for a solar cell absorber layer, we present a layer-transfer technique via low-cost electroplating at waferscale. 20~50-m-thick-Si layers are exfoliated at room-temperature electroplating with a good wafer uniformity. Surface antireflection techniques adopting nanostructures are of considerable importance for achieving high photovoltaic performances while effectively reducing the light reflection in crystalline Si solar cells. The remaining two topics are focused on clean hydrogen production based on molecular splitting of water. Silicon and carbon (i.e., graphene, graphitic carbon nitrides) materials are very useful to industrially realize this approach. Especially, we also introduce the emerging new technology (Thermovoltage-driven Solar hydrogen), which is synergistically combining photoelectrochemical conversion and thermoelectric generator for massively producing hydrogen.