DOI: 10.1126/science.1168636. Switchable Ferroelectric Diode and Photovoltaic Effect in BiFeO <sub>3</sub>

Switchable Ferroelectric Diode and Photovoltaic Effect in BiFeO 3

10.1126/science.1168636

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

Unidirectional electric current flow, such as that found in a diode, is essential for modern electronics. It usually occurs at asymmetric interfaces such as p-n junctions or metal/semiconductor interfaces with Schottky barriers. We report on a diode effect associated with the direction of bulk electric polarization in BiFeO 3 : a ferroelectric with a small optical gap edge of ∼2.2 electron volts. We found that bulk electric conduction in ferroelectric monodomain BiFeO 3 crystals is highly nonlinear and unidirectional. This diode effect switches its direction when the electric polarization is flipped by an external voltage. A substantial visible-light photovoltaic effect is observed in BiFeO 3 diode structures. These results should improve understanding of charge conduction mechanisms in leaky ferroelectrics and advance the design of switchable devices combining ferroelectric, electronic, and optical functionalities.

Bibliography

Choi, T., Lee, S., Choi, Y. J., Kiryukhin, V., & Cheong, S.-W. (2009). Switchable Ferroelectric Diode and Photovoltaic Effect in BiFeO 3. Science, 324(5923), 63â66.

Authors 5

T. Choi (first)
S. Lee (additional)
Y. J. Choi (additional)
V. Kiryukhin (additional)
S.-W. Cheong (additional)

References 22 Referenced 1,835

J. F. Scott Ferroelectric Memories (Springer Heidelberg Germany 2000). (10.1007/978-3-662-04307-3)
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10.1088/0953-8984/20/02/021001
10.1126/science.1080615
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This work was funded by NSF (grants NSF-DMR-0804109 and 0704487). T.C. was partially supported by a Korea Research Foundation Grant funded by the Korean government (MOEHRD grant KRF-2007-357-C00023).

Dates

Type	When
Created	16 years, 6 months ago (Feb. 19, 2009, 9:44 p.m.)
Deposited	1 year, 7 months ago (Jan. 10, 2024, 4:36 a.m.)
Indexed	4 minutes ago (Aug. 28, 2025, 3:04 p.m.)
Issued	16 years, 4 months ago (April 3, 2009)
Published	16 years, 4 months ago (April 3, 2009)
Published Print	16 years, 4 months ago (April 3, 2009)

Funders 0

None

BibTeX

@article{Choi_2009, title={Switchable Ferroelectric Diode and Photovoltaic Effect in BiFeO 3}, volume={324}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1168636}, DOI={10.1126/science.1168636}, number={5923}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Choi, T. and Lee, S. and Choi, Y. J. and Kiryukhin, V. and Cheong, S.-W.}, year={2009}, month=apr, pages={63–66} }

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