Luminescence mechanism of Sm doped MgAl2O4 nanophosphors: Role of nanoparticle size, samarium content and structural defects

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00553459" target="_blank" >RIV/68378271:_____/22:00553459 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.jlumin.2021.118493" target="_blank" >https://doi.org/10.1016/j.jlumin.2021.118493</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jlumin.2021.118493" target="_blank" >10.1016/j.jlumin.2021.118493</a>

Result language
angličtina
Original language name
Luminescence mechanism of Sm doped MgAl2O4 nanophosphors: Role of nanoparticle size, samarium content and structural defects
Original language description
We report structural and luminescence properties of the spinel MgAl2O4:Sm3+ nanophosphors (with Sm3+ content of 0.03, 0.1, 0.2, 0.3, 0.5, 1.0, 1.5, and 3.0 wt%.) synthesized by a co-precipitation method. The X-ray phase analysis and transmission electron microscopy show that the size of the MgAl2O4:Sm3+ nanoparticles varies from 5 nm to 6 nm at a synthesis temperature of 700 ◦C and from 7 nm to 15 nm at 1000 ◦C. We demonstrate that the samples synthesized at 700 ◦C with a samarium content of 1.5 wt% are the most promising candidates for use as orange phosphors. We show that near-surface rare-earth ion segregation arises in the nanoparticles with an average size of 10 nm and the Sm concentrations of 1.0 wt% and 1.5 wt%. Simulation of the MgAl2O4:Sm3+ luminescence spectrum by the modified crystal field theory (MCFT) indicates that Sm ions occupy both octahedral and tetrahedral positions.
Czech name
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Czech description
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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
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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