articleNature CommunicationsFeb 8, 2016GOLD OA

Ionic polarization-induced current–voltage hysteresis in CH3NH3PbX3 perovskite solar cells

SMSimone MeloniTMThomas MoehlWTWolfgang TressMFMarius FranckevičiusMSMichael Saliba

NCCR Chemical Biology - Visualisation and Control of Biological Processes Using Chemistry · École Polytechnique Fédérale de Lausanne · +1 more institution

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Abstract

CH3NH3PbX3 (MAPbX3) perovskites have attracted considerable attention as absorber materials for solar light harvesting, reaching solar to power conversion efficiencies above 20%. In spite of the rapid evolution of the efficiencies, the understanding of basic properties of these semiconductors is still ongoing. One phenomenon with so far unclear origin is the so-called hysteresis in the current-voltage characteristics of these solar cells. Here we investigate the origin of this phenomenon with a combined experimental and computational approach. Experimentally the activation energy for the hysteretic process is determined and compared with the computational results. First-principles simulations show that the…

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Topics & keywords

Topics
Keywords
  • Hysteresis
  • Materials science
  • Polarization (electrochemistry)
  • Chemical physics
  • Perovskite (structure)
  • Voltage
  • Solar cell
  • Solar energy
UN Sustainable Development Goals
  • Affordable and clean energy
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