AVS 62nd International Symposium & Exhibition
    Energy Frontiers Focus Topic Tuesday Sessions
       Session EN-TuP

Paper EN-TuP9
Hybrid Photoelectrode Based on Two-Dimensional Materials Decorated BiFeO3 Thin Films for Efficient Solar Water Splitting

Tuesday, October 20, 2015, 6:30 pm, Room Hall 3

Session: Energy Frontiers Poster Session
Presenter: Taekjib Choi, Sejong University, Republic of Korea
Authors: C.M. Youn, Sejong University, Republic of Korea
H. Lee, Sejong University, Republic of Korea
J. Lee, Sejong University, Republic of Korea
H. Lee, Sejong University, Republic of Korea
T. Choi, Sejong University, Republic of Korea
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Semiconducting metal oxides have been attracted much interest as photoelectrodes for solar water splitting because of their stable photochemical activity in aqueous solutions. However, photoelectrochemical performance is usually limited by poor charge carrier separation. Thus, hybrid photoelectrodes combined with semiconducting ferroelectric materials offer promising potential for achieving efficient solar water splitting by promoting photogenerated-charge carrier separation due to spontaneous electric polarization leading to an increase in the elective electric field. In this study, we have fabricated two-dimensional materials decorated BiFeO3 thin films as hybrid electrodes. The structural and optical properties of single and hybrid electrodes were comparatively characterized. The hybrid electrodes exhibited a stronger absorption of visible light and produced a higher photocurrent than that of single electrode. For hybrid electrodes, photoelectrochemical characterization demonstrated a large enhancement of the interfacial charge transfer kinetics as well as an efficient charge carrier separation, which greatly contributed to the improved photoelectrochemical performances. In addition, we will discuss poling effect of electric polarization on interface reduction/oxidation (REDOX) through electrolyte ions. Therefore, our results provide useful information for developing highly efficient hybrid photoelectrodes for solar water splitting.