Core-valence luminescence in ABX3 crystals

The investigation of the new type of intrinsic emission caused by recombination of core holes and valence electrons, i.e., the core valence luminescence (CVL), is made for perovskite-like ABX3 crystals (A = Li, K, Rb, Cs; B = Mg, Ca, Sr, Ba; X = F, Cl, Br). For this crystals the spectra of CVL cover 9 - 2 eV region, time decay constants change in 1 - 3 ns and bound, emission intensity in some crystals exceeds the intensity in AHC in several times. The possibility of growing ABX3 crystals with different lattice parameters allows us to control spectral and kinetics parameters as well as CVL light yield