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Efficient Planar Hybrid n-Si/PEDOT:PSS Solar Cells with Power Conversion Efficiency up to 13.31% Achieved by Controlling the SiO x Interlayer

Author

Listed:
  • Chenxu Zhang

    (Wide Bandgap Semiconductor Technology Disciplines State Key Laboratory, School of Microelectronics, Xidian University, Xi’an 710071, China)

  • Yuming Zhang

    (Wide Bandgap Semiconductor Technology Disciplines State Key Laboratory, School of Microelectronics, Xidian University, Xi’an 710071, China)

  • Hui Guo

    (Wide Bandgap Semiconductor Technology Disciplines State Key Laboratory, School of Microelectronics, Xidian University, Xi’an 710071, China)

  • Qubo Jiang

    (School of Electronic Engineering and Automation, Guilin University of Electronic Technology, No. 1 Jinji Road, Guilin 541004, China)

  • Peng Dong

    (Wide Bandgap Semiconductor Technology Disciplines State Key Laboratory, School of Microelectronics, Xidian University, Xi’an 710071, China)

  • Chunfu Zhang

    (Wide Bandgap Semiconductor Technology Disciplines State Key Laboratory, School of Microelectronics, Xidian University, Xi’an 710071, China)

Abstract

In this work, the effects of the SiO x interface layer grown by exposure in air on the performance of planar hybrid n-Si/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) solar cells are investigated. Compared to the cell with a hydrogen-terminated Si surface, the cell with an oxygen-terminated Si surface reveals improved characteristics in power conversion efficiency, increased from 10.44% to 13.31%. By introducing the SiO x , the wettability of the Si surface can be improved, allowing an effective spread of the PEDOT:PSS solution and thus a good contact between the PEDOT:PSS film and Si. More importantly, it can change the polarity of the Si surface from a negative dipole to a positive dipole, owing to the introduction of the SiO x interface. The Si energy band will bend up and give rise to a favorable band alignment between Si and PEDOT:PSS to promote carrier separation. These results could be potentially employed to further development of this simple, low-cost heterojunction solar cell.

Suggested Citation

  • Chenxu Zhang & Yuming Zhang & Hui Guo & Qubo Jiang & Peng Dong & Chunfu Zhang, 2018. "Efficient Planar Hybrid n-Si/PEDOT:PSS Solar Cells with Power Conversion Efficiency up to 13.31% Achieved by Controlling the SiO x Interlayer," Energies, MDPI, vol. 11(6), pages 1-10, May.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1397-:d:149735
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    Citations

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    Cited by:

    1. Tao Chen & Hao Guo & Leiming Yu & Tao Sun & Yu Yang, 2020. "Silicon Substrate Treated with Diluted NaOH Aqueous for Si/PEDOT: PSS Heterojunction Solar Cell with Performance Enhancement," Energies, MDPI, vol. 13(18), pages 1-10, September.
    2. Tao Chen & Hao Guo & Leiming Yu & Tao Sun & Anran Chen & Juan Wang & Chong Wang & Yu Yang, 2020. "Antireflection Improvement and Junction Quality Optimization of Si/PEDOT:PSS Solar Cell with the Introduction of Dopamine@Graphene," Energies, MDPI, vol. 13(22), pages 1-13, November.

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