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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Luminescence

ISSN

0022-2313

e-ISSN

1872-7883

Svazek periodika

241

Číslo periodika v rámci svazku

Jan

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

118493

Kód UT WoS článku

000702876700007

EID výsledku v databázi Scopus

2-s2.0-85115930563