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Combination of Metal Oxide and Polytriarylamine: A Design Principle to Improve the Stability of Perovskite Solar Cells

Author

Listed:
  • Marina M. Tepliakova

    (Center for Energy Science and Technology (CEST), Skolkovo Institute of Science and Technology, Nobel st. 3, 143026 Moscow, Russia)

  • Alexandra N. Mikheeva

    (Center for Energy Science and Technology (CEST), Skolkovo Institute of Science and Technology, Nobel st. 3, 143026 Moscow, Russia)

  • Pavel A. Somov

    (Center for Energy Science and Technology (CEST), Skolkovo Institute of Science and Technology, Nobel st. 3, 143026 Moscow, Russia)

  • Eugene S. Statnik

    (Center for Energy Science and Technology (CEST), Skolkovo Institute of Science and Technology, Nobel st. 3, 143026 Moscow, Russia)

  • Alexander M. Korsunsky

    (Center for Energy Science and Technology (CEST), Skolkovo Institute of Science and Technology, Nobel st. 3, 143026 Moscow, Russia
    Multi-Beam Laboratory for Engineering Microscopy, Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK)

  • Keith J. Stevenson

    (Center for Energy Science and Technology (CEST), Skolkovo Institute of Science and Technology, Nobel st. 3, 143026 Moscow, Russia)

Abstract

In the last decade, perovskite photovoltaics gained popularity as a potential rival for crystalline silicon solar cells, which provide comparable efficiency for lower fabrication costs. However, insufficient stability is still a bottleneck for technology commercialization. One of the key aspects for improving the stability of perovskite solar cells (PSCs) is encapsulating the photoactive material with the hole-transport layer (HTL) with low gas permeability. Recently, it was shown that the double HTL comprising organic and inorganic parts can perform the protective function. Herein, a systematic investigation and comparison of four double HTLs incorporating polytriarylamine and thermally evaporated transition metal oxides in the highest oxidation state are presented. In particular, it was shown that MoO x , WO x , and VO x -based double HTLs provided stable performance of PSCs for 1250 h, while devices with NbO x lost 30% of their initial efficiency after 1000 h. Additionally, the encapsulating properties of all four double HTLs were studied in trilayer stacks with HTL covering perovskite, and insignificant changes in the absorber composition were registered after 1000 h under illumination. Finally, it was demonstrated using ToF-SIMS that the double HTL prevented the migration of perovskite volatile components within the structure. Our findings pave the way towards improved PSC design that ensures their long-term operational stability.

Suggested Citation

  • Marina M. Tepliakova & Alexandra N. Mikheeva & Pavel A. Somov & Eugene S. Statnik & Alexander M. Korsunsky & Keith J. Stevenson, 2021. "Combination of Metal Oxide and Polytriarylamine: A Design Principle to Improve the Stability of Perovskite Solar Cells," Energies, MDPI, vol. 14(16), pages 1-13, August.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:16:p:5115-:d:617565
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    References listed on IDEAS

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    1. Jeffrey A. Christians & Philip Schulz & Jonathan S. Tinkham & Tracy H. Schloemer & Steven P. Harvey & Bertrand J. Tremolet de Villers & Alan Sellinger & Joseph J. Berry & Joseph M. Luther, 2018. "Tailored interfaces of unencapsulated perovskite solar cells for >1,000 hour operational stability," Nature Energy, Nature, vol. 3(1), pages 68-74, January.
    2. Takeo Oku, 2015. "Crystal Structures of CH3NH3PbI3 and Related Perovskite Compounds Used for Solar Cells," Chapters, in: Leonid A. Kosyachenko (ed.), Solar Cells - New Approaches and Reviews, IntechOpen.
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