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Photovoltaic and photo-capacitance effects in ferroelectric BiFeO3 thin film
Thirmal Chinthakuntla, Subramanian Venkatachalam,
Published in American Institute of Physics Inc.
2017
Volume: 110
   
Issue: 19
Abstract
A polycrystalline BiFeO3 film on Pt/Ti/SiO2/Si was fabricated using the spin coating technique. The film shows diode-like characteristics with and without poling measured under dark conditions. However, it exhibits a switchable photovoltaic effect with light illumination under poled conditions. The measured photovoltaic effect revealed an open circuit voltage of ∼0.47 V and a short circuit current of 3.82 μA/cm2 under the illumination of 165 mW/cm2 irradiance. The studies clarified the dominant role of the depolarization field rather than the interface in the photovoltaic characteristics of the BiFeO3 film. Significantly, the photo-capacitance effect was demonstrated with a substantial enhancement in capacitance (∼45%) in Au/BiFeO3/Pt geometry, which could open up a new window for BiFeO3 applications. © 2017 Author(s).
About the journal
JournalData powered by TypesetApplied Physics Letters
PublisherData powered by TypesetAmerican Institute of Physics Inc.
ISSN00036951
Open AccessNo
Concepts (13)
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    Capacitance
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    Interfaces (materials)
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    Open circuit voltage
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    Thin films
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    CAPACITANCE EFFECT
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    Dark conditions
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    DEPOLARIZATION FIELDS
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    LIGHT ILLUMINATION
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    Photovoltaic
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    PHOTOVOLTAIC CHARACTERISTICS
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    POLYCRYSTALLINE BIFEO
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    SWITCHABLE
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    Photovoltaic effects