Abstract
Temperature- and excitation density-dependent photoluminescence are presented and discussed in detail for the BaZrO2.9 compound prepared from the non-luminescent BaZrO3 sample. The thermal-quenching behavior of the photoluminescence peak intensity is described with two activation energies, E (a1) = 185 and E (a2) = 139 meV. The variation of the integrated photoluminescence intensity with the excitation density shows a linear behavior with the slope close to alpha = 1.06, indicating that the PL signal is attributed to the excitonic recombination.