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Influence of the Carrier Selective Front Contact Layer and Defect State of a-Si:H/c-Si Interface on the Rear Emitter Silicon Heterojunction Solar Cells

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  • Sunhwa Lee

    (School of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea)

  • Duy Phong Pham

    (School of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea)

  • Youngkuk Kim

    (School of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea)

  • Eun-Chel Cho

    (School of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea)

  • Jinjoo Park

    (Division of Energy and Optical Technology Convergence, Cheongju University, Cheongju 28503, Korea)

  • Junsin Yi

    (School of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea)

Abstract

In this research, simulations were performed to investigate the effects of carrier selective front contact (CSFC) layer and defect state of hydrogenated amorphous silicon passivation layer/n-type crystalline silicon interface in silicon heterojunction (SHJ) solar cells employing the Automat for Simulation of hetero-structure (AFORS-HET) simulation program. The results demonstrated the effects of band offset determined by band bending at the interface of the CSFC layer/passivation layer. In addition, the nc-SiOx: H CSFC layer not only reduces parasitic absorption loss but also has a tunneling effect and field effect passivation. Furthermore, it increased the selectivity of contact. In the experimental cell, nc-SiO x :H was used as the CSFC layer, where efficiency of the SHJ solar cell was 22.77%. Our investigation shows that if a SiO x layer passivation layer is used, the device can achieve efficiency up to 25.26%. This improvement in the cell is mainly due to the enhancement in open circuit voltage ( V oc ) because of lower interface defect density resulting from the SiO x passivation layer.

Suggested Citation

  • Sunhwa Lee & Duy Phong Pham & Youngkuk Kim & Eun-Chel Cho & Jinjoo Park & Junsin Yi, 2020. "Influence of the Carrier Selective Front Contact Layer and Defect State of a-Si:H/c-Si Interface on the Rear Emitter Silicon Heterojunction Solar Cells," Energies, MDPI, vol. 13(11), pages 1-11, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:11:p:2948-:d:368925
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    References listed on IDEAS

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    1. Zheng, Cheng & Kammen, Daniel M., 2014. "An innovation-focused roadmap for a sustainable global photovoltaic industry," Energy Policy, Elsevier, vol. 67(C), pages 159-169.
    2. Kunta Yoshikawa & Hayato Kawasaki & Wataru Yoshida & Toru Irie & Katsunori Konishi & Kunihiro Nakano & Toshihiko Uto & Daisuke Adachi & Masanori Kanematsu & Hisashi Uzu & Kenji Yamamoto, 2017. "Silicon heterojunction solar cell with interdigitated back contacts for a photoconversion efficiency over 26%," Nature Energy, Nature, vol. 2(5), pages 1-8, May.
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    Cited by:

    1. Paweł Węgierek & Justyna Pastuszak & Kamil Dziadosz & Marcin Turek, 2020. "Influence of Substrate Type and Dose of Implanted Ions on the Electrical Parameters of Silicon in Terms of Improving the Efficiency of Photovoltaic Cells," Energies, MDPI, vol. 13(24), pages 1-17, December.

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