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Mechanism of Concentration Quenching of Gd 3+ and Eu 3+ Emission in Perovskite‐Like Aluminates
Author(s) -
de Vries A. J.,
van Vliet J. P. M.,
Blasse G.
Publication year - 1988
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.2221490142
Subject(s) - quenching (fluorescence) , excitation , energy transfer , perovskite (structure) , k nearest neighbors algorithm , atomic physics , activation energy , analytical chemistry (journal) , materials science , chemistry , crystallography , physics , fluorescence , quantum mechanics , chromatography , artificial intelligence , computer science
The mechanism of concentration quenching of the Gd 3+ emission in (La, Gd)AlO 3 and the Eu 3+ emission in (Eu, Gd)AlO 3 is reported and discussed. Nearest and next‐nearest neighbors are involved in the concentration quenching process. Nearest neighbor transfer occurs by exchange interaction. Even for next‐nearest neighbors this type of interaction seems to dominate. In GdAlO 3 energy migration via the 6 I level is reported. After excitation of the 6 I level, the excitation energy migrates at 300 K about 1350 steps over the 6 I level before nonradiative decay to the 6 P level occurs. The energy migration in EuAlO 3 at low temperatures can be described with a phonon‐assisted process.