articleNature EnergyDec 1, 2017HYBRID OA

Large guanidinium cation mixed with methylammonium in lead iodide perovskites for 19% efficient solar cells

ADAlexander D. JodlowskiCRCristina Roldán‐CarmonaGGGiulia GranciniMSManuel SaladoMRMaryline Ralaiarisoa

École Polytechnique Fédérale de Lausanne · University of Córdoba · +3 more institutions

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Abstract

Abstract Organic–inorganic lead halide perovskites have shown photovoltaic performances above 20% in a range of solar cell architectures while offering simple and low-cost processability. Despite the multiple ionic compositions that have been reported so far, the presence of organic constituents is an essential element in all of the high-efficiency formulations, with the methylammonium and formamidinium cations being the sole efficient options available to date. In this study, we demonstrate improved material stability after the incorporation of a large organic cation, guanidinium, into the MAPbI 3 crystal structure, which delivers average power conversion efficiencies over 19%, and stabilized performance for…

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Topics & keywords

Topics
Keywords
  • Formamidinium
  • Halide
  • Iodide
  • Perovskite (structure)
  • Energy conversion efficiency
  • Photovoltaic system
  • Solar cell
  • Materials science
UN Sustainable Development Goals
  • Affordable and clean energy
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