Impact of built-in potential across LaFeO3/SrTiO3 heterojunctions on photocatalytic activity

Kentarou Nakamura, Hisanori Mashiko, Kohei Yoshimatsu, Akira Ohtomo

研究成果: Article査読

22 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号211605
ジャーナルApplied Physics Letters
108
21
DOI
出版ステータスPublished - 2016 5月 23
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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