Ultrafast Excited-State Localization in Cs<sub>2</sub>AgBiBr<sub>6</sub> Double Perovskite
Adam D. Wright, Leonardo R. V. Buizza, Kimberley J. Savill, Giulia Longo, Henry J. Snaith, Michael B. Johnston, Laura M. Herz
Abstract
at room temperature. Self-trapped charge carriers subsequently diffuse to color centers, causing broad emission that is strongly red-shifted from a direct band edge whose band gap and associated exciton binding energy shrink with increasing temperature in a correlated manner. Overall, our observations suggest that strong electron-phonon coupling in this material induces rapid charge-carrier localization.
Topics & Concepts
Excited stateUltrashort pulsePerovskite (structure)Materials scienceAngstromState (computer science)PhysicsChemistryCrystallographyAtomic physicsOpticsComputer scienceLaserAlgorithmPerovskite Materials and ApplicationsSolid-state spectroscopy and crystallographyOptical properties and cooling technologies in crystalline materials