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Zero-dimensional methylammonium iodo bismuthate solar cells and synergistic interactions with silicon nanocrystals

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Author(s)

Calum McDonald, Chengsheng Ni, Vladimir Švrček, Mickaël Lozac'H, Paul A. Connor, Paul Maguire, John T. S. Irvine, Davide Mariotti

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Abstract

Organometal trihalide perovskite solar cells have attracted monumental attention in recent years. Today's best devices, based on a three-dimensional perovskite structure of corner-sharing PbI6 octahedra, are unstable, toxic, and display hysteresis in current-voltage measurements. We present zero-dimensional organic-inorganic hybrid solar cells based on methylammonium iodo bismuthate (CH3NH3)3(Bi2I9) (MABI) comprising a Bi2I9 bioctahedra and observe very low hysteresis for scan rates in the broad range of 150 mV s-1 to 1500 mV s-1 without any interfacial layer engineering. We confirm good stability for devices produced and stored in open air without humidity control. The MABI structure can also accommodate silicon nanocrystals, leading to an enhancement in the short-circuit current. Through the material MABI, we demonstrate a promising alternative to the organometal trihalide perovskite class and present a model material for future composite third-generation photovoltaics.

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Original languageEnglish
Pages (from-to)18759-18771
Number of pages13
JournalNanoscale
Volume9
Issue number47
Early online date23 Nov 2017
DOIs
Publication statusPublished - 21 Dec 2017

    Research areas

  • Perovskite solar cells, Hybrid solar cells , Silicon nanocrystals, Third-generation solar cells

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