2012
DOI: 10.1021/nn204604m
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Dynamics of Photogenerated Surface Charge on BiFeO3 Films

Abstract: We report on the spatial and temporal evolution of photoinduced charge generation and carrier separation in heteroepitaxial BiFeO(3) thin films deposited on Nb:SrTiO(3) as measured in ambient at room temperature with Kelvin probe and piezoresponse force microscopy. Contributions from the self-poled and ferroelectric polarization charge are identified from the time evolution of the correlated surface potential and ferroelectric polarization in films as grown and following poling, and at different stages and int… Show more

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Cited by 52 publications
(44 citation statements)
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“…It is about 10 times larger than that of TiO 2 (ca. 30 mV, under UV light) 42 , and even larger than that of the quality epitaxial BiFeO 3 films (0.16V) 43 .…”
mentioning
confidence: 84%
“…It is about 10 times larger than that of TiO 2 (ca. 30 mV, under UV light) 42 , and even larger than that of the quality epitaxial BiFeO 3 films (0.16V) 43 .…”
mentioning
confidence: 84%
“…Many ferroelectric materials with relatively high Curie temperature have been demonstrated; these materials can be used in solar cells because they can retain their ferroelectric properties even at practically high temperatures associated with the operation of solar cells. Significant research has been performed on the photovoltaic characteristics of BTO [20,21], lead zirconate titanate (PbZrxTi1−xO3, PZT) [22][23][24], bismuth titanate (Bi4Ti3O12) [25], potassium sodium niobate (K0.5Na0.5NbO3, KNN) [26,27], and BFO [21,28,29].…”
Section: Advances and Open Issuesmentioning
confidence: 99%
“…[102][103][104][105][106] Subsequent research has worked to better understand these bulk photovoltaic and domain-wall-based mechanisms. [107,108] This area is primed for future development as researchers determine how to create devices with the optimum geometries required to extract useful function from these systems. Particularly there is interest in how to enhance photoexcited carrier concentrations and motilities as well as determining the role of electron correlations in photo transport.…”
Section: Reshaping Ferroic Physics-exploring Exotic and Emergent Polamentioning
confidence: 99%