articleNature EnergyMar 28, 2024HYBRID OA

Ion-induced field screening as a dominant factor in perovskite solar cell operational stability

JTJarla ThiesbrummelSSSahil ShahEGEmilio Gutierrez‐PartidaFZFengshuo ZuFPFrancisco Peña‐Camargo

University of Potsdam · University of Oxford · +9 more institutions

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Abstract

Abstract The presence of mobile ions in metal halide perovskites has been shown to adversely affect the intrinsic stability of perovskite solar cells (PSCs). However, the actual contribution of mobile ions to the total degradation loss compared with other factors such as trap-assisted recombination remains poorly understood. Here we reveal that mobile ion-induced internal field screening is the dominant factor in the degradation of PSCs under operational conditions. The increased field screening leads to a decrease in the steady-state efficiency, often owing to a large reduction in the current density. Instead, the efficiency at high scan speeds (>1,000 V s −1 ), where the ions are immobilized, is much less…

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214
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100%
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Topics & keywords

Topics
Keywords
  • Ion
  • Degradation (telecommunications)
  • Chemical physics
  • Materials science
  • Perovskite (structure)
  • Halide
  • Open-circuit voltage
  • Screening effect
UN Sustainable Development Goals
  • Affordable and clean energy
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