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Composite nature of the self‐trapped exciton luminescence in PbWO 4
Author(s) -
Itoh Minoru,
Sakurai Takaaki
Publication year - 2005
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200510020
Subject(s) - luminescence , exciton , composite number , spectroscopy , ion , tetrahedron , range (aeronautics) , materials science , chemistry , molecular physics , optoelectronics , atomic physics , condensed matter physics , physics , crystallography , quantum mechanics , composite material , organic chemistry
The blue luminescence from a self‐trapped exciton (STE) in PbWO 4 is studied by means of time‐resolved spectroscopy in the temperature range of 77–300 K. The result clearly reveals that the STE luminescence consists of three bands peaking at 407, 425, and 450 nm. Such a composite nature indicates the importance of the Jahn–Teller effect on the lowest triplet STE states at the tetrahedral (WO 4 ) 2− complex anion. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)