articleNature CommunicationsJun 24, 2015GOLD OA

Ionic transport in hybrid lead iodide perovskite solar cells

CEChristopher EamesJMJarvist M. FrostPRPiers R. F. BarnesBCBrian C. O’ReganAWAron Walsh

University of Bath · Imperial College London

PubMed
Indexed incrossrefdoajpubmed

Abstract

Solar cells based on organic-inorganic halide perovskites have recently shown rapidly rising power conversion efficiencies, but exhibit unusual behaviour such as current-voltage hysteresis and a low-frequency giant dielectric response. Ionic transport has been suggested to be an important factor contributing to these effects; however, the chemical origin of this transport and the mobile species are unclear. Here, the activation energies for ionic migration in methylammonium lead iodide (CH3NH3PbI3) are derived from first principles, and are compared with kinetic data extracted from the current-voltage response of a perovskite-based solar cell. We identify the microscopic transport mechanisms, and find facile…

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Topics & keywords

Topics
Keywords
  • Iodide
  • Halide
  • Perovskite (structure)
  • Ionic bonding
  • Chemical physics
  • Solar cell
  • Materials science
  • Activation energy
UN Sustainable Development Goals
  • Affordable and clean energy
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