Time-resolved luminescence of nanocrystalline inorganic complex oxides

V. Pankratov; D. Millers; L. Grigorjeva; W. Lojkowski; A. Kareiva

doi:10.1088/1742-6596/93/1/012037

Time-resolved luminescence of nanocrystalline inorganic complex oxides

V. Pankratov^*
, D. Millers
, L. Grigorjeva
, W. Lojkowski
, A. Kareiva

^*Corresponding author for this work

Laboratory of Spectroscopy, Institute of Solid State Physics

University of Latvia
Polish Academy of Science
Vilnius University

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Two types of complex nanosized oxides - cerium doped Y₃Al ₅O₁₂ (YAG) and CaWO₄- have been studied by means of time-resolved luminescence spectroscopy. Comparative study of time-resolve luminescence characteristics of cerium doped YAG single crystal, nanopowders and nanoceramic as well as for CaWO₄ macro- and nanocrystals has been done. Two components in the decay kinetic of Ce ³⁺ related emission in YAG nanocrystals were detected and it was suggested that a different energy transfer rate to volume and surface Ce ³⁺ ions takes place. It is shown that the segregation of Ce ³⁺ ions near nanoparticles surface and/or dislocation lines plays a crucial role in degradation of light yield of cerium related luminescence in YAG nanocrystals. Time-resolved properties of sol-gel synthesized CaWO₄ nanocrystals depends strongly on the synthesis rout. It was shown that shallow traps have a strong influence on the luminescence decay times of nanosized CaWO₄.

Original language	English
Article number	012037
Journal	Journal of Physics: Conference Series
Volume	93
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/93/1/012037
Publication status	Published - 1 Dec 2007

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title = "Time-resolved luminescence of nanocrystalline inorganic complex oxides",

abstract = "Two types of complex nanosized oxides - cerium doped Y3Al 5O12 (YAG) and CaWO4- have been studied by means of time-resolved luminescence spectroscopy. Comparative study of time-resolve luminescence characteristics of cerium doped YAG single crystal, nanopowders and nanoceramic as well as for CaWO4 macro- and nanocrystals has been done. Two components in the decay kinetic of Ce 3+ related emission in YAG nanocrystals were detected and it was suggested that a different energy transfer rate to volume and surface Ce 3+ ions takes place. It is shown that the segregation of Ce 3+ ions near nanoparticles surface and/or dislocation lines plays a crucial role in degradation of light yield of cerium related luminescence in YAG nanocrystals. Time-resolved properties of sol-gel synthesized CaWO4 nanocrystals depends strongly on the synthesis rout. It was shown that shallow traps have a strong influence on the luminescence decay times of nanosized CaWO4.",

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T1 - Time-resolved luminescence of nanocrystalline inorganic complex oxides

AU - Pankratov, V.

AU - Millers, D.

AU - Grigorjeva, L.

AU - Lojkowski, W.

AU - Kareiva, A.

PY - 2007/12/1

Y1 - 2007/12/1

N2 - Two types of complex nanosized oxides - cerium doped Y3Al 5O12 (YAG) and CaWO4- have been studied by means of time-resolved luminescence spectroscopy. Comparative study of time-resolve luminescence characteristics of cerium doped YAG single crystal, nanopowders and nanoceramic as well as for CaWO4 macro- and nanocrystals has been done. Two components in the decay kinetic of Ce 3+ related emission in YAG nanocrystals were detected and it was suggested that a different energy transfer rate to volume and surface Ce 3+ ions takes place. It is shown that the segregation of Ce 3+ ions near nanoparticles surface and/or dislocation lines plays a crucial role in degradation of light yield of cerium related luminescence in YAG nanocrystals. Time-resolved properties of sol-gel synthesized CaWO4 nanocrystals depends strongly on the synthesis rout. It was shown that shallow traps have a strong influence on the luminescence decay times of nanosized CaWO4.

AB - Two types of complex nanosized oxides - cerium doped Y3Al 5O12 (YAG) and CaWO4- have been studied by means of time-resolved luminescence spectroscopy. Comparative study of time-resolve luminescence characteristics of cerium doped YAG single crystal, nanopowders and nanoceramic as well as for CaWO4 macro- and nanocrystals has been done. Two components in the decay kinetic of Ce 3+ related emission in YAG nanocrystals were detected and it was suggested that a different energy transfer rate to volume and surface Ce 3+ ions takes place. It is shown that the segregation of Ce 3+ ions near nanoparticles surface and/or dislocation lines plays a crucial role in degradation of light yield of cerium related luminescence in YAG nanocrystals. Time-resolved properties of sol-gel synthesized CaWO4 nanocrystals depends strongly on the synthesis rout. It was shown that shallow traps have a strong influence on the luminescence decay times of nanosized CaWO4.

UR - https://www.scopus.com/pages/publications/45849097110

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VL - 93

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

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ER -

Time-resolved luminescence of nanocrystalline inorganic complex oxides

Abstract

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