Deformation-stimulated luminescence of a KBr crystal matrix
https://doi.org/10.32523/ejpfm.2023070306
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.
Keywords
alkali halide crystal (AHC),
X-ray luminescence,
uniaxial deformation,
exciton,
electron-hole assembly,
exciton-like luminescence
Supporting agencies: The authors express their sincere gratitude to the staff of the K. Zhubanov Aktobe Regional University and the ”Radiation Physics of Materials” scientific center for their support in fundamental research and discussion of the obtained results.
About the Authors
K. Shunkeyev
K. Zhubanov Aktobe Regional University
Kazakhstan
Kazakhstan
Aktobe
A. Tilep
K. Zhubanov Aktobe Regional University
Kazakhstan
Kazakhstan
Aktobe
Sh. Sagimbayeva
K. Zhubanov Aktobe Regional University
Kazakhstan
Kazakhstan
Aktobe
Zh. Ubaev
K. Zhubanov Aktobe Regional University
Kazakhstan
Kazakhstan
Aktobe
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Review
For citations:
Shunkeyev K., Tilep A., Sagimbayeva Sh., Ubaev Zh. Deformation-stimulated luminescence of a KBr crystal matrix. Eurasian Journal of Physics and Functional Materials. 2023;7(3):185-196. https://doi.org/10.32523/ejpfm.2023070306
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