Perovskite–fullerene hybrid materials suppress hysteresis in planar diodes

Solution-processed planar perovskite devices are highly desirable in a wide variety of optoelectronic applications; however, they are prone to hysteresis and current instabilities. Here we report the first perovskite-PCBM hybrid solid with significantly reduced hysteresis and recombination loss achieved in a single step. This new material displays an efficient electrically coupled microstructure: PCBM is homogeneously distributed throughout the film at perovskite grain boundaries. The PCBM passivates the key PbI3(-) antisite defects during the perovskite self-assembly, as revealed by theory and experiment. Photoluminescence transient spectroscopy proves that the PCBM phase promotes electron extraction. We…

• UD
  U.S. Department of Energy
• CC
  Compute Canada
• GO
  Government of Ontario
• NR
  National Research Foundation

  Award: 2014R1A2A1A09005656
• UO
  University of Toronto
• NR
  National Research Foundation of Korea

  Award: 2014R1A2A1A09005656
• KA
  King Abdullah University of Science and Technology

  Award: KUS-11-009-21
• OO
  Office of Science
• NS
  Natural Sciences and Engineering Research Council of Canada