Acta Physica Sinica, Volume. 69, Issue 12, 127301-1(2020)

Photovoltaic effect and photo-assisted diode behavior in Pt/BiFeO3/Nb-doped SrTiO3 heterojunction

Chuan-Chuan Liu, Fei-Xiang Hao, Yue-Wei Yin*, and Xiao-Guang Li
Author Affiliations
  • CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China
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    Figures & Tables(8)
    Pt/BFO/NSTO heterojunction: (a) Schematic illustration; (b) energy band structure diagram.
    (a) XRD pattern of BFO/NSTO heterojunction; (b) P-E hysteresis loop of BFO (200 nm) film measured under 2 kHz.
    J-V curves of Pt/BFO(60 nm)/NSTO heterojunction in the dark and under the laser irradiation with various irradiation intensities at room temperature: (a) λ ~ 365 nm; (b) λ ~ 445 nm. The inset of panel (b) shows the magnified image at low voltages.
    Light intensity dependent (a) open-circuit voltage and (b) short-circuit current density under laser irradiation with different wavelengths.
    (a), (c) Temperature dependent J-V curves of Pt/BFO/NSTO heterojunction under laser irradiation; (b), (d) corresponding temperature dependent open-circuit voltage and short-circuit current density. In (a) and (b), λ ~ 365 nm, 74 mW/cm2; in (c) and (d), λ ~ 445 nm, 1.56 W/cm2.
    Jsc vs. 1000/T and the fitting result by Arrhenius model.
    Temperature dependent Schottky barrier height and ideal factor: (a) λ ~ 365 nm, 74 mW/cm2; (b) λ ~ 445 nm, 1.56 W/cm2.
    (a) J-V curves of Pt/BFO/NSTO heterojunction in the dark and under the laser irradiation with different irradiation intensities for 445 nm wavelength. The black solid lines are fitting results by SCLC model. (b) Light intensity dependent Vtran and .
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    Chuan-Chuan Liu, Fei-Xiang Hao, Yue-Wei Yin, Xiao-Guang Li. Photovoltaic effect and photo-assisted diode behavior in Pt/BiFeO3/Nb-doped SrTiO3 heterojunction [J]. Acta Physica Sinica, 2020, 69(12): 127301-1

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    Paper Information

    Received: Feb. 24, 2020

    Accepted: --

    Published Online: Dec. 8, 2020

    The Author Email:

    DOI:10.7498/aps.69.20200280

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