Optical studies of Pb2+ ions in a LiBaF3 crystal

The absorption and luminescence spectra of a LiBaF3:Pb2+ crystal are studied in the temperature range 10-300 K. At 300 K a structureless absorption band (A band) is found in the energy range 1.4-6.6 eV. The luminescence spectra at 300 and 10 K are composed of two A' and A1 bands with maxima at...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2006-05, Vol.18 (20), p.4985-4993
Main Authors: Aminov, L K, Nikitin, S I, Silkin, N I, Shakhov, A A, Yusupov, R V, Abdulsabirov, R Yu, Korableva, S L
Format: Article
Language:English
Online Access:Get full text
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Summary:The absorption and luminescence spectra of a LiBaF3:Pb2+ crystal are studied in the temperature range 10-300 K. At 300 K a structureless absorption band (A band) is found in the energy range 1.4-6.6 eV. The luminescence spectra at 300 and 10 K are composed of two A' and A1 bands with maxima at ~5.0 and ~4.0 eV, respectively. The A' band originates from the 'regular' Pb2+ centres. The A' band luminescence decay is single-exponential in the whole temperature range 10-300 K. The properties of the observed absorption and A' luminescence bands are described well within the semiclassical theory based on the Franck-Condon principle and the Jahn-Teller effect in the excited sp configuration. The possible nature of the A1 band luminescence is discussed.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/18/20/021