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BANDGAP ENGINEERING OF PbO/PbTiO3 FOR FERROELECTRIC PHOTOVOLTAICS BY INTERFACE EFFECT

Author

Listed:
  • LIJING WEI

    (School of Information Engineering and Computer, Hebei Finance University, Baoding, Hebei 071051, P. R. China)

  • YINGLONG WANG

    (��Department of Primary Education, Baoding Preschool Teachers College, Baoding, Hebei 071051, P. R. China‡Key Laboratory of High-Precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding, Hebei 071002, P. R. China)

  • LI GUAN

    (��Key Laboratory of High-Precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding, Hebei 071002, P. R. China)

  • JIANXIN GUO

    (��Key Laboratory of High-Precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding, Hebei 071002, P. R. China)

Abstract

It is critical to reduce the bandgap of a ferroelectric photovoltaic (FE-PV) material in order to get the optimal effect of FE-PV. The interface effect of PbO/PbTiO3 (P/PT) is used in this work to lower the bandgap of PbTiO3 via the addition of PbO. The bandgaps of (P/PT)down and (P/PT)up1, which are two types of polarization structures, fall from 2.63 eV of pure PbTiO3 to 2.07 eV and 2.08 eV, respectively. Densities of states are calculated for pure PbO, pure PbTiO3, and P/PT to determine the reason of the bandgap drop. The results indicate that the PbO component of P/PT is critical for both the conduction band minimum (CBM) and valence band maximum (VBM) states. Calculations of the absorption coefficient indicate that P/PT absorbs more light over a wider range of wavelengths in the visible-light region than PbTiO3.

Suggested Citation

  • Lijing Wei & Yinglong Wang & Li Guan & Jianxin Guo, 2022. "BANDGAP ENGINEERING OF PbO/PbTiO3 FOR FERROELECTRIC PHOTOVOLTAICS BY INTERFACE EFFECT," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 29(08), pages 1-7, August.
    • Handle: RePEc:wsi:srlxxx:v:29:y:2022:i:08:n:s0218625x22501001
    DOI: 10.1142/S0218625X22501001
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