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- W2473995538 abstract "Abstract Bi 0.9 La 0.1 FeO 3 (BLFO) films were fabricated on La 0.7 Sr 0.3 MnO 3 (LSMO)/SrTiO 3 (STO)(001) substrates by pulsed laser deposition. The ferroelectric photovoltaic characteristics of Au/BLFO/LSMO heterostructures were studied under green light illumination. The open circuit voltage and short circuit current were observed to be positive and negative values under weak light illumination in the as-grown self-poled downward BLFO thin films, while they changed the signs when the light intensity is strong. On the contrary, this photovoltaic properties can be switched when the BLFO films were in poled up state. The photovoltaic effect was also strongly dependent on the polarization direction, incident light intensity and the distribution of oxygen vacancies. As a result, the sign of open circuit voltage and short circuit current could be independent of the direction of polarization. We believe that the switchable diode and photovoltaic effects can be explained well using the concepts of Schottky barrier modulation by polarization flipping and of oxygen vacancies and the distribution of oxygen vacancies at Au/BLFO or BLFO/LSMO interface. Our work provides deep insights into the nature of diode and photovoltaic effects in ferroelectric films, implying an effective approach to improve photovoltaic effect by tuning oxygen vacancies in ferroelectric materials." @default.
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- W2473995538 date "2016-09-01" @default.
- W2473995538 modified "2023-10-17" @default.
- W2473995538 title "Switchable photovoltaic effect in Au/Bi0.9La0.1FeO3/La0.7Sr0.3MnO3 heterostructures" @default.
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- W2473995538 doi "https://doi.org/10.1016/j.matchemphys.2016.06.059" @default.
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