Solvent Annealing of Perovskite‐Induced Crystal Growth for Photovoltaic‐Device Efficiency Enhancement

Solvent-annealing is found to be an effective method to increase the grain size and carrier diffusion lengths of trihalide perovskite materials. The carrier diffusion length of MAPbI3 is increased to over 1 μm. The efficiency remains above 14.5% when the MAPbI3 thickness changes from 250 nm to 1 μm, with the highest efficiency reaching 15.6%.

• NS
  National Science Foundation

  Awards: 1201384, 1252623, ECCS-1201384, ECCS-1252623
• UD
  U.S. Department of Energy
• DT
  Defense Threat Reduction Agency
• OO
  Office of Naval Research

  Award: N000141210556
• DO
  Division of Electrical, Communications and Cyber Systems

  Award: ECCS-1252623