articleNature CommunicationsMay 11, 2017GOLD OA

Fast oxygen diffusion and iodide defects mediate oxygen-induced degradation of perovskite solar cells

NANicholas AristidouCEChristopher EamesISIrene Sánchez‐MolinaXBXiangnan BuJKJán Koščo

Imperial College London · University of Bath

PubMed
Indexed incrossrefdoajpubmed

Abstract

Abstract Methylammonium lead halide perovskites are attracting intense interest as promising materials for next-generation solar cells, but serious issues related to long-term stability need to be addressed. Perovskite films based on CH 3 NH 3 PbI 3 undergo rapid degradation when exposed to oxygen and light. Here, we report mechanistic insights into this oxygen-induced photodegradation from a range of experimental and computational techniques. We find fast oxygen diffusion into CH 3 NH 3 PbI 3 films is accompanied by photo-induced formation of highly reactive superoxide species. Perovskite films composed of small crystallites show higher yields of superoxide and lower stability. Ab initio simulations indicate…

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Topics & keywords

Topics
Keywords
  • Perovskite (structure)
  • Iodide
  • Passivation
  • Oxygen
  • Materials science
  • Halide
  • Degradation (telecommunications)
  • Photodegradation
UN Sustainable Development Goals
  • Life in Land
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