articleNature EnergyJan 4, 2024HYBRID OA

Multifunctional sulfonium-based treatment for perovskite solar cells with less than 1% efficiency loss over 4,500-h operational stability tests

JSJiajia SuoBYBowen YangEMEdoardo MosconiDBDmitry BogachukTATiarnan A. S. Doherty

Uppsala University · École Polytechnique Fédérale de Lausanne · +12 more institutions

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Abstract

Abstract The stabilization of grain boundaries and surfaces of the perovskite layer is critical to extend the durability of perovskite solar cells. Here we introduced a sulfonium-based molecule, dimethylphenethylsulfonium iodide (DMPESI), for the post-deposition treatment of formamidinium lead iodide perovskite films. The treated films show improved stability upon light soaking and remains in the black α phase after two years ageing under ambient condition without encapsulation. The DMPESI-treated perovskite solar cells show less than 1% performance loss after more than 4,500 h at maximum power point tracking, yielding a theoretical T 80 of over nine years under continuous 1-sun illumination. The solar cells…

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Topics & keywords

Topics
Keywords
  • Sulfonium
  • Iodide
  • Perovskite (structure)
  • Materials science
  • Energy conversion efficiency
  • Thermal stability
  • Chemical engineering
  • Optoelectronics
UN Sustainable Development Goals
  • Affordable and clean energy
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