Electronic excitations and defects in fluoroperovskite LiBaF3

Maris Springis; Liga Brikmane; Ivar Tale; Peteris Kulis

doi:10.1117/12.515694

8 August 2003 Electronic excitations and defects in fluoroperovskite LiBaF₃

Maris Springis, Liga Brikmane, Ivar Tale, Peteris Kulis

Proceedings Volume 5122, Advanced Organic and Inorganic Optical Materials; (2003) https://doi.org/10.1117/12.515694
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

Abstract

A survey of the present situation with respect to knowledge of lattice defects, electronic excitations, such as excitons and localized excitons, as well as energy storage and transfer phenomena in LiBaF₃ crystals is given. Both phenomenological models and experimental interpretations of optical absorption bands, tentatively associated with F-type (electron) centers created by X-ray or electron irradiation, is reviewed. Interpretation of three radiative processes (super-fast core-valence transitions, slow trapped exciton luminescence and luminescence of structure defects) observed in undoped LiBaF₃ crystals is analyzed with respect to practical application. Attention is paid to the behavior of ultraviolet emission so far ascribed to self-trapped exciton luminescence and also observed as a result of electron recombination with localized hole at various temperatures (even at room temperature), depending on crystal purity and growth conditions. Finally, some aspects of ionic processes in thermal relaxation of defects are pointed to.

Citation Download Citation

Maris Springis, Liga Brikmane, Ivar Tale, and Peteris Kulis "Electronic excitations and defects in fluoroperovskite LiBaF₃", Proc. SPIE 5122, Advanced Organic and Inorganic Optical Materials, (8 August 2003); https://doi.org/10.1117/12.515694

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