Long-range hot-carrier transport in hybrid perovskites visualized by ultrafast microscopy

) thin films by ultrafast transient absorption microscopy, demonstrating three distinct transport regimes. Quasiballistic transport was observed to correlate with excess kinetic energy, resulting in up to 230 nanometers transport distance that could overcome grain boundaries. The nonequilibrium transport persisted over tens of picoseconds and ~600 nanometers before reaching the diffusive transport limit. These results suggest potential applications of hot-carrier devices based on hybrid perovskites.

• NS
  National Science Foundation

  Awards: DMR-1507803, award297649
• UD
  U.S. Department of Energy

  Award: award297650