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Strong quenching of Y 2 SiO 5 :Pr 3+ nanocrystal luminescence by praseodymium nonuniform distribution
Author(s) -
Zhmurin P. N.,
Znamenskii N. V.,
Yukina T. G.,
Malyukin Yu. V.
Publication year - 2007
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.200642544
Subject(s) - luminescence , nanocrystal , quenching (fluorescence) , praseodymium , ionic radius , analytical chemistry (journal) , materials science , relaxation (psychology) , spectroscopy , ionic bonding , ion , chemistry , fluorescence , nanotechnology , optoelectronics , optics , physics , social psychology , psychology , organic chemistry , chromatography , quantum mechanics , metallurgy
Using site‐selective and time‐resolved spectroscopy technique in combination with single molecular spectroscopy technique the concentration quenching of the 1 D 2 luminescence of Pr 3+ ions has been examined in Y 2 SiO 5 :Pr 3+ nanocrystals. The direct comparison of the data obtained for nano‐ and bulk Y 2 SiO 5 :Pr 3+ crystals has revealed that the concentration threshold of luminescence quenching is strikingly low for nanocrystals. In this case the ordered stage in the 1 D 2 luminescence decay has been observed at anomalously low Pr concentration (0.5 at%). This effect is caused by the preferred Pr accumulation at the nanocrystal periphery that provides the relaxation of elastic tension arising due to the difference of ionic radii of Pr 3+ and Y 3+ . The temporal behavior of the 1 D 2 luminescence decay in the disordered stage shows that the concentration quenching is caused by the cooperative cross‐relaxation. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)