Pressure influence on excitonic luminescence of CsPbBr perovskite.

This study investigates the effect of hydrostatic pressure on the luminescence properties of CsPbBr single crystals at 12 K. The luminescence at the edge of the band gap reveals a structure attributed to free excitons, phonon replica of the free excitons, and Rashba excitons. Changes in the relative intensity of the free and Rashba excitons were observed with increasing pressure, caused by changes in the probability of nonradiative deexcitation.

Bright and fast scintillations of an inorganic halide perovskite CsPbBr crystal at cryogenic temperatures.

Highly efficient scintillation crystals with short decay times are indispensable for improving the performance of numerous detection and imaging instruments that use- X-rays, gamma-quanta, ionising particles or neutrons. Halide perovskites emerged recently as very promising materials for detection of ionising radiation that motivated further exploration of the materials. In this work, we report on excellent scintillation properties of CsPbBr crystals when cooled to cryogenic temperatures.