Efficient and stable large-area perovskite solar cells with inorganic charge extraction layers

The recent dramatic rise in power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) has triggered intense research worldwide. However, high PCE values have often been reached with poor stability at an illuminated area of typically less than 0.1 square centimeter. We used heavily doped inorganic charge extraction layers in planar PSCs to achieve very rapid carrier extraction, even with 10- to 20-nanometer-thick layers, avoiding pinholes and eliminating local structural defects over large areas. The robust inorganic nature of the layers allowed for the fabrication of PSCs with an aperture area >1 square centimeter that have a PCE >15%, as certified by an accredited photovoltaic calibration…

• SN
  Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
• JS
  Japan Science and Technology Agency
• NI
  National Institute for Materials Science
• CR
  Core Research for Evolutional Science and Technology
• NR
  National Renewable Energy Laboratory