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Updated: May 12, 2026

Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors
Published on: November 15, 2016
Centers of near-IR luminescence in bismuth-doped TlCl and CsI crystals
V O Sokolov1, V G Plotnichenko, E M Dianov
1Fiber Optics Research Center of the Russian Academy of Sciences 38 Vavilov Street, Moscow, 119333, Russia. vence.s@gmail.com
Abstract:
A comparative first-principles study of possible bismuth-related centers in TlCl and CsI crystals is performed and the results of computer modeling are compared with the experimental data. The calculated spectral properties of the bismuth centers suggest that the IR luminescence in TlCl:Bi is most likely caused by Bi(+)···V(Cl)(-) centers (Bi(+) ion in thallium site and a negatively charged chlorine vacancy in the nearest anion site). On the contrary, Bi(+) substitutional ions and Bi(2)(+) dimers are most likely responsible for the IR luminescence in CsI:Bi.
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