@article{7dc683bc53924c79884884dbafe42f2d,
title = "Impact of built-in potential across LaFeO3/SrTiO3 heterojunctions on photocatalytic activity",
abstract = "Polar-nonpolar interfaces between insulating LaFeO3 (LFO) and semiconducting SrTiO3 (STO) were investigated to elucidate effects of built-in potential on photocarrier dynamics during water oxidation reactions. The LFO films were grown on the TiO2- and SrO-terminated (001) Nb-doped STO substrates by using pulsed-laser deposition. The photocurrent-voltage curves varied depending on the interface termination. Potential profiles across the interface were established from these curves as well as capacitance-voltage curves. The presence of a depletion (accumulation) region near the SrO- (TiO2-) terminated interface facilitates (suppresses) the extraction of photocarriers generated in STO. On the other hand, the difference in the built-in potential in LFO barely reflects the magnitude of the photocurrent.",
author = "Kentarou Nakamura and Hisanori Mashiko and Kohei Yoshimatsu and Akira Ohtomo",
note = "Funding Information: The authors thank M. Nakamura for useful discussion. This work was partly supported by MEXT Elements Strategy Initiative to Form Core Research Center, MEXT Photon and Quantum Basic Research Coordinated Development Program, and a Grant-in-Aid for Scientific Research (No. 15H03881) from the Japan Society for the Promotion of Science Foundation. H.M. acknowledges financial support by JSPS Research Fellowships for Young Scientists and the Program for the MEXT Leading Graduate Schools Academy for Cocreative Education of Environment and Energy Science (ACEEES). Publisher Copyright: {\textcopyright} 2016 Author(s).",
year = "2016",
month = may,
day = "23",
doi = "10.1063/1.4952736",
language = "English",
volume = "108",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "21",
}