The effect of glass structure and local rare earth site symmetry on the optical properties of rare earth doped alkaline earth aluminosilicate glasses
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F23%3A10465981" target="_blank" >RIV/00216208:11310/23:10465981 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=CImRdZaLqF" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=CImRdZaLqF</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.actamat.2023.118811" target="_blank" >10.1016/j.actamat.2023.118811</a>
Alternative languages
Result language
angličtina
Original language name
The effect of glass structure and local rare earth site symmetry on the optical properties of rare earth doped alkaline earth aluminosilicate glasses
Original language description
Understanding the connection of molecular structure and optical properties of rare earth doped luminescent materials is essential for fabrication of state-of-the-art active laser media. On the other hand, rare earth ions can be used as a probe ion for the molecular structure of the host material if the structure-property correlations are known. Therefore, this work combines molecular dynamics simulations, Judd-Ofelt theory and UV-vis-NIR ab-sorption spectroscopy including the behavior of the structure-sensitive hypersensitive absorption transitions of Er3+ to expand the knowledge on the local molecular structure in the immediate vicinity of the doped rare earth ions in dependence of glass composition. For this purpose, glasses of the compositions (35-x) BaO . x MgO . 10 Al2O3 . 55 SiO2 (mol%) (x = 0, 7.5, 15, 25, 35) and (20-x) BaO . x MgO . 20 Al2O3 . 60 SiO2 (mol%) (x = 0, 10, 20), doped with 2 x 10(20) ions/cm(3) Er(3+) were prepared and analyzed. Clear differences in the absorption spectra between glasses of different BaO/MgO ratios, i.e. different network modifier field strengths, and different network modifier oxide to Al2O3 ratios are found and discussed in detail. Glasses with high BaO concentrations and high network modifier oxide to Al2O3 ratios provide lower rare earth coordination numbers with oxygen in general but higher coordination probabilities with non-bridging oxygen, which results in notably increased splitting of the optical transitions of the doped rare earth ions and higher hypersensitivity / lower local site symmetry for the doped rare earth ions in the investigated compositions. Based on our results and results from other publications the local rare earth site symmetry in glasses can in general be correlated with the rare earth coordination number.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Acta Materialia
ISSN
1359-6454
e-ISSN
1873-2453
Volume of the periodical
249
Issue of the periodical within the volume
May
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
118811
UT code for WoS article
000957790700001
EID of the result in the Scopus database
2-s2.0-85163659844