Polaron Protected Long-Lived Hot Carriers in Mixed Cation and Anion Perovskite Nanocrystals

摘要

We demonstrate protection of hot-carriers at nanosecond timescales via polaron formation in mixed cation and anion perovskite nanocrystals using ultrafast spectroscopy. The effective carrier protection precedes perovskite photovoltaic devices with efficiencies exceeding Shockley-Quisser limit.