Robust Room-Temperature Polariton Condensation and Lasing in Scalable FAPbBr3 Perovskite Microcavities

• DOI: 10.1021/acsphotonics.4c02458
• Publication Date: 2025-04-01T03:14:12Z
• Authors: Mateusz Król; Mitko Oldfield; Matthias Wurdack; Eliezer Estrecho; Gary Beane; Yihui Hou; Andrew G. Truscott; Agustin Schiffrin; Elena A. Ostrovskaya

Exciton-polariton condensation in direct bandgap semiconductors strongly coupled to light enables a broad range of fundamental studies and applications such as low-threshold electrically driven lasing. Yet, materials hosting exciton-polariton ambient conditions are rare, with fabrication protocols that often inefficient nonscalable. Here, room-temperature lasing is observed microcavity embedded formamidinium lead bromide (FAPbBr3) perovskite film. This optically active material spin-coated onto the mirror, which makes whole device scalable up large lateral sizes. The sub-μm granulation polycrystalline FAPbBr3 film allows for observation polariton single quantum-confined mode polaritonic "quantum dot". Compared random photon lasing, bare films, exhibits lower threshold, narrower line width, an order magnitude longer coherence time. Both under pulsed optical pumping persist without significant degradation 6 17 h continuous experimental run, respectively. study demonstrates excellent potential new polaritonics, added value efficient offered by solution-based spin-coating process.