High-temperature superfluorescence in methyl ammonium lead iodide

Light–matter interactions can create and manipulate collective many-body phases in solids1–3, which are promising for the realization of emerging quantum applications. However, most cases, these states fragile, with a short decoherence dephasing time, limiting their existence to precision tailored structures under delicate conditions such as cryogenic temperatures and/or high magnetic fields. In this work, we discovered that archetypal hybrid perovskite, MAPbI3 thin film, exhibits coherent phase, namely superfluorescence, at 78 K above. Pulsed laser excitation first creates population high-energy electron–hole pairs, quickly relax lower energy domains then develop macroscopic coherence through spontaneous synchronization. The fluence dependence spectroscopic features kinetics films unambiguously confirm all well-known characteristics superfluorescence. These results show creation manipulation perovskites be used basic building blocks applications4,5. A is observed CH3NH3PbI3 K. its characteristics.