Deformation-stimulated luminescence of a KBr crystal matrix

Abstract

Radiative relaxations of electronic excitations - self-trapped excitons (STE) in regular lattice sites (intrinsic luminescence) and exciton-like formations (ELF) in the field of homologous cations (exciton-like luminescence). It has been found that the maximum effect of luminescence enhancement occurs upon uniaxial deformation along the <110> crystallographic direction (compared to <100>), which coincides with the direction of the self-trapped anion exciton (<110>) in the KBr crystal matrix. The exciton mechanism was estimated from the increase in the intensity of the intrinsic s(4, 42eV) - and p(2, 3eV) - luminescences of STE, and the enhancement of luminescence intensity of near-single Na⁺ (2.85 eV), pair ions Na⁺ , Na⁺ (3.1 eV) and Na⁺ Pb⁺⁺ (3.4 eV)- centers - recombination mechanism of radiative relaxation of electronic excitations.

Recommended Citation

Shunkeyev, K.; Tilep, A.; Sagimbayeva, Sh.; and Ubaev, Zh. (2023) "Deformation-stimulated luminescence of a KBr crystal matrix," Eurasian Journal of Physics and Functional Materials: Vol. 7: No. 3, Article 6.
DOI: https://doi.org/10.32523/ejpfm.2023070306