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On the mechanism of persistent up-conversion luminescence in the ZrO2:Yb3+,Er3+ nanomaterials

Pihlgren, Laura; Laihinen, Tero; Rodrigues, Lucas C. V.; Carlson, Stefan LU ; Eskola, Kari O.; Kotlov, Aleksei; Lastusaari, Mika; Soukka, Tero; Brito, Hermi F. and Holsa, Jorma (2014) In Optical Materials 36(10). p.1698-1704
Abstract
The up-converting ZrO2:Yb3+,E3+ nanomaterials were prepared with the combustion and sal-gel methods. The structure of the materials was cubic except for the minor monoclinic and tetragonal impurities associated with the use of the sal-gel method. The XANES results revealed only the trivalent form for both the Yb and Er dopants. The distance distributions calculated from EXAFS confirm that Er3+ and Yb3+ occupy the Zr-IV site in the structure. The nanomaterials show red (650-700 nm) and very weak green (520-560 nm) up-conversion luminescence due to the F-4(9/2) -> I-4(15/2) and (H-2(11/2),S-4(3/2)) -> I-4(15/2) transitions of Er3+, respectively. The nanomaterials obtained with the combustion synthesis yield the most intense... (More)
The up-converting ZrO2:Yb3+,E3+ nanomaterials were prepared with the combustion and sal-gel methods. The structure of the materials was cubic except for the minor monoclinic and tetragonal impurities associated with the use of the sal-gel method. The XANES results revealed only the trivalent form for both the Yb and Er dopants. The distance distributions calculated from EXAFS confirm that Er3+ and Yb3+ occupy the Zr-IV site in the structure. The nanomaterials show red (650-700 nm) and very weak green (520-560 nm) up-conversion luminescence due to the F-4(9/2) -> I-4(15/2) and (H-2(11/2),S-4(3/2)) -> I-4(15/2) transitions of Er3+, respectively. The nanomaterials obtained with the combustion synthesis yield the most intense luminescence though showing significant afterglow, as well. The thermoluminescence measurements revealed the existence of traps with depths between 0.68 and 1.03 eV well matching to room temperature persistent emission. Finally, the mechanism for the persistent up-conversion luminescence was introduced based on the experimental results and discussed. (C) 2014 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Zirconia, Nanomaterial, Ytterbium, Erbium, Persistent up-conversion
in
Optical Materials
volume
36
issue
10
pages
1698 - 1704
publisher
Elsevier
external identifiers
  • wos:000338406300019
  • scopus:84925290184
ISSN
0925-3467
DOI
10.1016/j.optmat.2014.01.027
language
English
LU publication?
yes
id
0fc03832-ec6e-4eef-b6fc-fde5d8942f52 (old id 4602613)
date added to LUP
2014-09-04 15:23:30
date last changed
2017-06-11 04:06:10
@article{0fc03832-ec6e-4eef-b6fc-fde5d8942f52,
  abstract     = {The up-converting ZrO2:Yb3+,E3+ nanomaterials were prepared with the combustion and sal-gel methods. The structure of the materials was cubic except for the minor monoclinic and tetragonal impurities associated with the use of the sal-gel method. The XANES results revealed only the trivalent form for both the Yb and Er dopants. The distance distributions calculated from EXAFS confirm that Er3+ and Yb3+ occupy the Zr-IV site in the structure. The nanomaterials show red (650-700 nm) and very weak green (520-560 nm) up-conversion luminescence due to the F-4(9/2) -> I-4(15/2) and (H-2(11/2),S-4(3/2)) -> I-4(15/2) transitions of Er3+, respectively. The nanomaterials obtained with the combustion synthesis yield the most intense luminescence though showing significant afterglow, as well. The thermoluminescence measurements revealed the existence of traps with depths between 0.68 and 1.03 eV well matching to room temperature persistent emission. Finally, the mechanism for the persistent up-conversion luminescence was introduced based on the experimental results and discussed. (C) 2014 Elsevier B.V. All rights reserved.},
  author       = {Pihlgren, Laura and Laihinen, Tero and Rodrigues, Lucas C. V. and Carlson, Stefan and Eskola, Kari O. and Kotlov, Aleksei and Lastusaari, Mika and Soukka, Tero and Brito, Hermi F. and Holsa, Jorma},
  issn         = {0925-3467},
  keyword      = {Zirconia,Nanomaterial,Ytterbium,Erbium,Persistent up-conversion},
  language     = {eng},
  number       = {10},
  pages        = {1698--1704},
  publisher    = {Elsevier},
  series       = {Optical Materials},
  title        = {On the mechanism of persistent up-conversion luminescence in the ZrO2:Yb3+,Er3+ nanomaterials},
  url          = {http://dx.doi.org/10.1016/j.optmat.2014.01.027},
  volume       = {36},
  year         = {2014},
}