Hyun Joon Jung
Korea Advanced Institute of Science and Technology · 材料科学
研究室紹介
Professor Hyun Joon Jung's research lab specializes in the development and characterization of advanced functional oxides for energy conversion and storage applications. The lab focuses on p-type semiconducting oxides—particularly CuBi₂O₄—for photoelectrochemical water reduction, aiming to improve solar energy conversion efficiency. Using advanced electron microscopy and electrochemical techniques, the group investigates defect structures and ion transport mechanisms in complex oxides such as stabilized zirconia, ceria, and bismuth oxide-based materials. Their work bridges materials synthesis, atomic-scale defect analysis, and electrochemical performance evaluation to design next-generation materials for sustainable energy technologies.
Research Overview
Research Output Trend
Figures are computed from collected data and may differ slightly.
Selected Papers
3Cu-based p-type semiconducting oxides have been sought for water-reduction photocathodes to enhance the energy-conversion efficiency in photoelectrochemical cells. CuBi<sub>2</sub>O<sub>4</sub> has recently attracted notable attention as a new family of p-type oxides, based on its adequate band gap. Although the identification of a major defect structure should be the first step toward understanding the electronic conduction behavior, no direct experimental analysis has been carried out yet. Usi
In this work, we studied a fluorite structure oxides: Yttria stabilized zirconia, (YSZ); Gd doped CeO 2 (GDC); erbia stabilized Bi 2 O 3 (ESB); Zr doped erbia stabilized Bi 2 O 3 (ZESB); Ca doped erbia stabilized Bi 2 O 3 (CESB) in the temperature range of 250 to 600 o C using electrochemical impedance spectroscopy (EIS). As is well known, grain boundary blocking effect was observed in YSZ and GDC. However, there is no grain boundary effect on ESB, ZESB, and CESB. The Nyquist plots of these mate
Cu-based p-type semiconducting oxides have been investigated for their potential as water-reduction photocathodes in order to enhance energy conversion efficiency in photoelectrochemical cells. Among these oxides, CuBi 2 O 4 has recently gained significant attention as a promising candidate for converting light energy into electrochemical reactions because of its good light absorption property with an adequate bandgap. Despite the importance of identifying the major defect structure to comprehen