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Energy Materials Laboratory © 2014, EML | All Rights Reserved.

Research

Our research goal is developing novel materials for energy applications with the current emphasis on non-toxic, earth-abundant, and low-cost compounds for photovoltaic and photocatalytic applications.

  • Earth-Abundant Inorganic Solar Cells
  • To realize mass deployment of a PV technology in an economically viable way, the PV devices must exhibit high efficiencies and consist of materials that are earth-abundant. The kesterite Cu2ZnSn(S,Se)4 (CZTS) compound has emerged as a potential candidate to reach this goal. We are working on improving the performance of CZTS solar cells as well as other earth-abundant solar cells such as SnS (SnSe).
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  • Hybrid Organic-Inorganic Perovskite Solar Cells
  • Hybrid organic-inorganic perovskite solar cells have brought a wave of attention to the field of photovoltaics as their potential to become the next-generation of solar cell devices has been realized—it has reached close to 20% of efficiency within several years of serious research. However, several issues concerning the toxicity and the lack of long-term stability of this technology need to be resolved, which is our current research focus.
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  • Photoelectrochemical Water Splitting
  • A promising and environmental-friendly way of producing hydrogen is photocatalytic water splitting, where the sun light is utilized to decompose water into oxygen and hydrogen gas. The traditional material for this purpose is TiO2 but its large bandgap (~3.0 eV) poses a severe limitation in terms of efficient utilization of the solar spectrum. As an alternative to TiO2, we propose to use Cu2ZnSn(S,Se)4 (CZTS), which is an earth-abundant semiconductor compound.
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  • Past Research Interests
  • Past research interests of the PI (Prof. Byungha Shin) before joining KAIST includes (i) investigation of high-k dielectric / III-V semiconductor for microelectronic applications, (ii) growth kinetics of epitaxial films prepared by ultra-high-vacuum techniques such as MBE and PLD, (iii) atomic-scale studies of III-V compound semiconductor heterostructures using cross-sectional STM. Click the link for the details.
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