Evidence of Hot Carrier Extraction in Metal Halide Perovskite Solar Cells

Shashi Sourabh, Hadi Afshari, Vincent Whiteside, Giles Eperon, Rebecca Scheidt, Tielyr Creason, Madalina Furis, Ahmad Kirmani, Bayram Saparov, Joseph Luther, Matthew Beard, Ian Sellers

Research output: Contribution to journalArticlepeer-review


The presence of hot carriers is presented in the operational properties of an (FA,Cs)Pb(I, Br, Cl)3 solar cell at ambient temperatures and under practical solar concentration. Albeit, in a device architecture that is not suitably designed as a functional hot carrier solar cell. At 100 K, clear evidence of hot carriers is observed in both the high energy tail of the photoluminescence spectra and from the appearance of a nonequilibrium photocurrent at higher fluence in light J-V measurements. At room temperature, however, the presence of hot carriers in the emission at elevated laser fluence is shown to compete with a gradual red shift in the PL peak energy as photoinduced halide segregation begins to occur at higher lattice temperature. The effects of thermionic emission of hot carriers and the presence of a nonequilibrium carrier distribution are also shown to be distinct from simple lattice heating. This results in large unsaturated photocurrents at high powers as the Fermi distribution exceeds that of the heterointerface controlling carrier transport and rectification.
Original languageAmerican English
JournalProgress in Photovoltaics: Research and Applications
StatePublished - 2024

NREL Publication Number

  • NREL/JA-5900-84596


  • hot carriers
  • metal halide perovskite
  • perovskite solar cells


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