Highly efficient all-inorganic perovskite solar cells with suppressed non-radiative recombination by a Lewis base

All-inorganic perovskite solar cells (PVSCs) have drawn increasing attention because of their outstanding thermal stability. However, their performance is still inferior than the typical organic-inorganic counterparts, especially for the devices with p-i-n configuration. Herein, we successfully employ a Lewis base small molecule to passivate the inorganic perovskite film, and its derived PVSCs achieved a champion efficiency of 16.1% and a certificated efficiency of 15.6% with improved photostability, representing the most efficient inverted all-inorganic PVSCs to date. Our studies reveal that the nitrile (C-N) groups on the small molecule effectively reduce the trap density of the perovskite film and thus…

• NS
  National Science Foundation

  Awards: DMR-1608279, MRI-1624430, 1856210, CHE-1856210, 1624430
• CU
  City University of Hong Kong

  Awards: 9610421, 7200587
• UO
  University of Washington
• NS
  Natural Science Foundation of Guangdong Province

  Award: 2019A1515010761
• IA
  Innovation and Technology Fund

  Award: GHP/021/18SZ
• OO
  Office of Naval Research

  Awards: N00014-17-1, GHP/021/18SZ, FA9550, N00014-17-1-2260, N00014
• DO
  Division of Materials Research

  Award: DMR-1608279
• DO
  Division of Chemistry

  Awards: 1624430, CHE-1856210, MRI-1624430, 1856210
• AF
  Air Force Office of Scientific Research

  Awards: FA9550-, FA9550-18-1-0046, FA9550