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Monolithic perovskite/organic tandem solar cells with 23.6% efficiency enabled by reduced voltage losses and optimized interconnecting layer

Author

Listed:
  • Wei Chen

    (The University of Hong Kong
    Southern University of Science and Technology
    National University of Singapore
    National University of Singapore)

  • Yudong Zhu

    (Southern University of Science and Technology
    The Hong Kong University of Science and Technology, Clear Water Bay)

  • Jingwei Xiu

    (Southern University of Science and Technology)

  • Guocong Chen

    (Southern University of Science and Technology)

  • Haoming Liang

    (National University of Singapore
    National University of Singapore)

  • Shunchang Liu

    (National University of Singapore
    National University of Singapore)

  • Hansong Xue

    (National University of Singapore)

  • Erik Birgersson

    (National University of Singapore
    National University of Singapore)

  • Jian Wei Ho

    (National University of Singapore)

  • Xinshun Qin

    (The University of Hong Kong)

  • Jingyang Lin

    (The University of Hong Kong
    Southern University of Science and Technology)

  • Ruijie Ma

    (The Hong Kong University of Science and Technology, Clear Water Bay)

  • Tao Liu

    (The Hong Kong University of Science and Technology, Clear Water Bay)

  • Yanling He

    (The University of Hong Kong
    Southern University of Science and Technology)

  • Alan Man-Ching Ng

    (Southern University of Science and Technology)

  • Xugang Guo

    (Southern University of Science and Technology)

  • Zhubing He

    (Southern University of Science and Technology)

  • He Yan

    (The Hong Kong University of Science and Technology, Clear Water Bay)

  • Aleksandra B. Djurišić

    (The University of Hong Kong)

  • Yi Hou

    (National University of Singapore
    National University of Singapore)

Abstract

Due to the large chemical composition and bandgap tunability of both perovskite and organic semiconductors, perovskite/organic tandem solar cells are attractive for next-generation thin-film photovoltaics. However, their efficiency is limited by the open-circuit voltage loss of wide-bandgap perovskite subcells and the non-ideal interconnecting layers. Here we report that the passivation of nickel oxide hole-transporting layers with benzylphosphonic acid leads to the suppression of interfacial recombination, boosting the voltage up to 1.26 V in a 1.79-eV-bandgap perovskite subcell. Then, we develop an optimized interconnecting layer structure based on a 4-nm-thick sputtered indium zinc oxide layer inserted between organic bathocuproine and molybdenum oxide with enhanced electrical properties and transmittance in the near-infrared region. Through these improvements, we achieve a maximum efficiency of 23.60% (22.95% certified) in the perovskite/organic tandem solar cell. In addition, the tandem device retained 90% initial efficiency after 500 h maximum power point tracking under continuous one sun illumination.

Suggested Citation

  • Wei Chen & Yudong Zhu & Jingwei Xiu & Guocong Chen & Haoming Liang & Shunchang Liu & Hansong Xue & Erik Birgersson & Jian Wei Ho & Xinshun Qin & Jingyang Lin & Ruijie Ma & Tao Liu & Yanling He & Alan , 2022. "Monolithic perovskite/organic tandem solar cells with 23.6% efficiency enabled by reduced voltage losses and optimized interconnecting layer," Nature Energy, Nature, vol. 7(3), pages 229-237, March.
    • Handle: RePEc:nat:natene:v:7:y:2022:i:3:d:10.1038_s41560-021-00966-8
    DOI: 10.1038/s41560-021-00966-8
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