What is the relationship between spontaneous polarization and bulk photovoltaic effect in LaFeO3=SrTiO3 heterojunctions?
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The relationship between spontaneous polarization and the bulk photovoltaic effect in LaFeO3/SrTiO3 heterojunctions is crucial for understanding their photovoltaic properties. Studies have shown that materials with the bulk photovoltaic effect, like BiFeO3/SrTiO3 heterostructures, exhibit carrier transport with specific characteristics. Additionally, the utilization of homogeneous spontaneous polarization in materials like MoS2 can lead to high-efficiency photovoltaic devices, as seen in graphene-MoS2 devices. Furthermore, distinguishing between the shift and ballistic mechanisms in ferroelectric bulk photovoltage effects, as demonstrated in BaTiO3 single crystals, provides insights into charge separation mechanisms. Moreover, the enhanced photovoltaic response in ferroelectric oxides like BBKT is attributed to large shift currents along specific directions, emphasizing the importance of polarization characteristics in driving the bulk photovoltaic effect.
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