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Photoluminescence and energy transfer in Eu 3+ ‐doped alkali gadolinium phosphates
Author(s) -
Krasnikov Aleksei,
Shalapska Tetiana,
Stryganyuk Gregory,
Voloshinovskii Anatoliy,
Zazubovich Svetlana
Publication year - 2013
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.201349020
Subject(s) - gadolinium , photoluminescence , luminescence , excited state , ion , alkali metal , doping , spectroscopy , analytical chemistry (journal) , chemistry , population , atomic physics , materials science , physics , optoelectronics , demography , organic chemistry , quantum mechanics , chromatography , sociology
Spectral‐kinetic characteristics of the undoped and Eu 3+ ‐doped alkali gadolinium phosphates of the type of MGdP 4 O 12 (M = Li, Na) have been studied within the 4.2–300 K temperature range using time‐resolved luminescence spectroscopy techniques. The photon cascade luminescence of Gd 3+ ions in the undoped LiGdP 4 O 12 phosphate has been observed. In the case of the Eu 3+ ‐doped MGdP 4 O 12 phosphates, no quantum cutting process takes place due to the spectral overlap of the charge transfer band of Eu 3+ with the bands arising from the 6 G J levels of Gd 3+ . The processes of energy migration along the Gd 3+ sublattice and the Gd 3+ → Eu 3+ energy transfer have been studied. The phonon‐assisted population of the Gd 3+ 6 P 5/2,3/2 excited levels is suggested to be responsible for the increase in the probability of the energy migration along the Gd 3+ sublattice via the 6 P J states with the subsequent energy transfer to the 5 I J levels of an Eu 3+ ion.