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.

The Influence of Halide Ion Substitution on Energy Structure and Luminescence Efficiency in CeBrI and CeBrI Crystals.

This study aims to determine the optimum composition of the CeBrI compound to achieve the maximum light output. It is based on calculations of the band energy structure of crystals, specifically taking into account the characteristics of the mutual location of local and band 5d states of the Ce ions. The band energy structures for CeBrI and CeBrI crystals were calculated using the projector augmented wave method.