Effect of thermal treatment on luminescence properties of long persistent CaAl2O4:Eu2+,Dy3+ synthesized by combustion method

Ruiz-Torres, R.; Chernov, V.; Salas, P.; Zúñiga-Rivera, N.J.; Dı́az-Torres, L.A.; Meléndrez, R.; Barboza‐Flores, M.

doi:10.1016/j.optmat.2020.109763

Cited by 11 publications

(2 citation statements)

References 18 publications

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“… MAl 2 O 4 (M = Sr, Ba, Ca) Eu 2+ /R 3+ (R=Dy, Nd, La) 7 h 516 nm–500 nm, 400 nm [ 253 ] 6. CaAl 2 O 4 Eu 2+ /Dy 3+ 6 h 438 nm Displays, detectors, data storage [ 254 ] Hydrothermal method 1. LiGa 2 O 8 Cr 3+ 10 min.…”

Section: Synthesis Of Persistent Luminescence Materialsmentioning

confidence: 99%

Persistent luminescent nanophosphors for applications in cancer theranostics, biomedical, imaging and security

Mushtaq,

Ayoub,

Kumar

et al. 2023

Materials Today Bio

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Section: Synthesis Of Persistent Luminescence Materialsmentioning

confidence: 99%

Persistent luminescent nanophosphors for applications in cancer theranostics, biomedical, imaging and security

Mushtaq,

Ayoub,

Kumar

et al. 2023

Materials Today Bio

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“…Most of the known phosphors are activator-doped materials in general, and mainly lanthanide ions and transition metal ions are employed as the dopant . Many persistent phosphor materials have been developed that exhibit a range of colors: ZnGa 2 O 4 :Cr 3+ (red), , CaAl 2 O 4 :Eu 2+ ,Dy 3+ (blue), , and SrAl 2 O 4 :Eu 2+ ,Dy 3+ (green) . Compounds such as ZnO, β-Ga 2 O 3 , and ZnGa 2 O 4 have been shown to exhibit self-activated luminescence.…”

Section: Introductionmentioning

confidence: 99%

Mn-Doped Ca₁₄Mg₄Ga₁₂O₃₆ with the Tululite Mineral Structure for Color-Tunable Emission

Sivakumar,

Muhammed Munthasir,

Thilagar

et al. 2024

Chem. Mater.

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In this study, the tululite mineral, Ca 14 Mg 4 Ga 12 O 36 (CMG), was synthesized by employing high-temperature solidstate reactions (1250 °C) and characterized by powder X-ray diffraction (PXRD). The structure consists of a network of (Ga/ Mg)O 4 tetrahedral units, forming a three-dimensional structure along with (Ga/Mg)O 6 units and CaO 6 and CaO 7 units. This compound was employed as a host to prepare Mn-based phosphors. Two different synthetic protocols were employed: (i) an ambient atmosphere (air) and (ii) a reduced atmosphere (10% H 2 /90% Ar). The prepared samples were characterized by employing a variety of techniques that include PXRD, XPS, UV−Vis absorption spectra, steady-state and time-resolved photoluminescence (PL) spectra, PL lifetime, and PL quantum yield (PLQY) measurements. The ambient condition-prepared samples contain Mn in the +4 oxidation state. The samples prepared under a reducing atmosphere contain Mn in the +2 oxidation state. The optical studies indicate that the Mn 4+ ions are present in an octahedral environment and Mn 2+ ions in a tetrahedral environment. The Mn 4+ -containing compounds exhibit a deep red emission (716 nm) upon excitation at 484 nm. The PLQY was found to be 51.1%, with a lifetime of 2.78 ms. The Mn 2+ -containing compounds exhibit an excitation wavelength-dependent (230−284 nm) tunable emission at 400 and 524 nm. The 400 nm emission was attributed to the possible oxygen vacancies in the reduced sample with the observed lifetime of ∼110 μs. The green emission (524 nm) can be attributed to the Mn 2+ ions having a PLQY of 9.28% with a lifetime of 4.61 ms (λ ex = 284 nm). The concentrationcaused quenching, radiative and nonradiative decay behaviors, spectroscopic parameters B, C, and D q /B, and the nephelauxetic ratio β were calculated for both the Mn 4+ and Mn 2+ ions in the compounds to understand the origin and possible mechanism of the observed emission behavior. The afterglow (>50 s) nature of Mn 2+ -containing compounds was investigated toward possible text encryption-related coding/decoding applications.

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Calcium Aluminate-Based Phosphors for Persistent Luminescence and Radiation Dosimetry

Singh,

Barua

2023

Indian Institute of Metals Series

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Effect of thermal treatment on luminescence properties of long persistent CaAl2O4:Eu2+,Dy3+ synthesized by combustion method

Cited by 11 publications

References 18 publications

Persistent luminescent nanophosphors for applications in cancer theranostics, biomedical, imaging and security

Persistent luminescent nanophosphors for applications in cancer theranostics, biomedical, imaging and security

Mn-Doped Ca₁₄Mg₄Ga₁₂O₃₆ with the Tululite Mineral Structure for Color-Tunable Emission

Calcium Aluminate-Based Phosphors for Persistent Luminescence and Radiation Dosimetry

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Effect of thermal treatment on luminescence properties of long persistent CaAl2O4:Eu2+,Dy3+ synthesized by combustion method

Cited by 11 publications

References 18 publications

Persistent luminescent nanophosphors for applications in cancer theranostics, biomedical, imaging and security

Persistent luminescent nanophosphors for applications in cancer theranostics, biomedical, imaging and security

Mn-Doped Ca14Mg4Ga12O36 with the Tululite Mineral Structure for Color-Tunable Emission

Calcium Aluminate-Based Phosphors for Persistent Luminescence and Radiation Dosimetry

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Product

Resources

About

Mn-Doped Ca₁₄Mg₄Ga₁₂O₃₆ with the Tululite Mineral Structure for Color-Tunable Emission