Low-Temperature Solution-Processed Tin Oxide as an Alternative Electron Transporting Layer for Efficient Perovskite Solar Cells

Lead halide perovskite solar cells with the high efficiencies typically use high-temperature processed TiO2 as the electron transporting layers (ETLs). Here, we demonstrate that low-temperature solution-processed nanocrystalline SnO2 can be an excellent alternative ETL material for efficient perovskite solar cells. Our best-performing planar cell using such a SnO2 ETL has achieved an average efficiency of 16.02%, obtained from efficiencies measured from both reverse and forward voltage scans. The outstanding performance of SnO2 ETLs is attributed to the excellent properties of nanocrystalline SnO2 films, such as good antireflection, suitable band edge positions, and high electron mobility. The simple…

• UD
  U.S. Department of Energy

  Award: DE-FOA-0000990
• OD
  Ohio Department of Development
• OB
  Ohio Board of Regents
• NN
  National Natural Science Foundation of China

  Awards: J1210061, 61376013, 91433203
• MO
  Ministry of Education of the People's Republic of China

  Award: 2014202020207
• MO
  Ministry of Science and Technology of the People's Republic of China

  Awards: 2015AA050601, 2011CB933300