Tuneable persistent luminescence of novel Mg3Y2Ge3O12 garnet

Krieķe, Guna; Doke, Guna; Antuzevičš, Andris; Pudza, Inga; Kuzmin, Alexei; Welter, Edmund

doi:10.1016/j.jallcom.2022.166312

Cited by 8 publications

(5 citation statements)

References 69 publications

(74 reference statements)

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“…The signal occurring at g = 2.0017 is smaller than the g‐value of the free‐electron g e = 2.0023 and can be identified as the signal of electron carriers. [ 30 ] It indicates that the PersL is closely related to the trapped electrons in the Sr 2 LuSbO 6 :Fe 3+ phosphor. [ 24,31 ]…”

Section: Resultsmentioning

confidence: 99%

A Novel Near‐Infrared Emitting Sr₂LuSbO₆:Fe³⁺ Phosphor with Persistent Luminescence Performance

Su,

Pang,

Tan

et al. 2024

Advanced Optical Materials

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The near‐infrared (NIR) persistent luminescence (PersL) materials have attracted widespread attention owing to the unique self‐sustained light with good penetrability. Currently, most of the reported NIR PersL materials are activated by Cr3+. Considering the potential toxicity of chromium ions, there is an urgent requirement to explore the Cr3+‐free NIR phosphors. Herein, a novel NIR phosphor Sr2LuSbO6:Fe3+ (SLSO:Fe3+) is prepared and its luminescence properties are systematically studied. The Fe3+‐activated Sr2LuSbO6 exhibits a long‐wavelength NIR emission band centered at 890 nm with a 110 nm full‐width at half maximum (FWHM), and its PersL can last over 18 h. The phosphor shows excellent PersL stability even after being dispersed in solutions of different environments for 7 days. Furthermore, the PersL emitted by the phosphor can penetrate the 2 cm thickness beef, evidencing its good NIR PersL penetration property. This work provides a novel NIR PersL materials based on Fe3+ luminescence for technological applications and also contributes to accelerate the development of new‐generation Fe3+‐doped NIR PersL phosphor toward versatile applications.

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Section: Resultsmentioning

confidence: 99%

A Novel Near‐Infrared Emitting Sr₂LuSbO₆:Fe³⁺ Phosphor with Persistent Luminescence Performance

Su,

Pang,

Tan

et al. 2024

Advanced Optical Materials

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“…However, intrinsic defects commonly exist in various materials, such as vacancies and lattice defects, which can generate a large number of trap levels, and they play an important role in the PersL properties. [16][17][18][19][20] Previous research on SrAl 2 O 4 :Eu 2+ has revealed that PersL is enhanced as the Sr 2+ deficiency increases. [21][22][23][24] This is due to the concomitant increase in the number of oxygen vacancies within the material.…”

Section: Introductionmentioning

confidence: 99%

“…In most PersL phosphors, the research of traps has focused on selecting the appropriate co‐dopants, while the studies on the trap center of intrinsic defect are much less than that on the co‐dopant. However, intrinsic defects commonly exist in various materials, such as vacancies and lattice defects, which can generate a large number of trap levels, and they play an important role in the PersL properties 16–20 . Previous research on SrAl 2 O 4 :Eu 2+ has revealed that PersL is enhanced as the Sr 2+ deficiency increases 21–24 .…”

Section: Introductionmentioning

confidence: 99%

Influence of trap centers on persistent luminescence of Cr³⁺ or Yb³⁺ Co‐doped Y₃Al₂Ga₃O₁₂:Pr³⁺ ceramic phosphors

Du,

Ueda,

Tanabe

2024

J Am Ceram Soc.

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Lanthanide ion doped garnet is one of the representative persistent luminescence (PersL) phosphors that have been widely investigated. However, the role of the trap centers, either intentionally added co‐dopants or intrinsic defects arising during the sintering process, and their effect on the performance of PersL has not been completely elucidated, especially when they coexist. In pursuit of clarifying the relationship among different trap centers and their impact on the afterglow, herein, low‐concentration Pr3+ and Cr3+/Yb3+ (electron trap) co‐doped Y3Al2Ga3O12 ceramic phosphors are synthesized using a solid‐state reaction method under a vacuum atmosphere and some of them are further subjected to annealing condition. The observed thermoluminescence glow curves are composed of two strong peaks related to oxygen vacancies and a weak peak formed by each Cr and Yb trap based on the relative concentration ratio. On the other hand, it is found that the Cr3+ and Yb3+ions act as prominent near‐infrared (NIR) PersL centers in the NIR‐I and NIR‐II region, respectively, matching with the first and the second biological window. This work allowed for an exploration of the properties of distinct trap centers and how they influence the PersL and are likely to hasten the development of new PersL materials.

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“…In addition to various well-established commercial uses of persistent luminescence phosphors in security signs, luminous paints and displays [10], there are many emerging applications such as optical storage [11,12], alternating current-driven light-emitting diodes [9,13], anticounterfeiting [14,15], in-vivo bioimaging and photodynamic therapy [10,16]. The mechanism of persistent luminescence involves excitation that creates charge carriers (electrons and holes) which are captured by charge traps (intrinsic or impurity-related defects).…”

Section: Introductionmentioning

confidence: 99%

“…Persistent luminescence has been detected in various garnet hosts predominantly consisting of gallates and germanates: Y3(Ga,Al)5O12 [18,19], Gd3(Ga,Al)5O12 [20,21], Mg3Y2Ge3O12 [9,22] Y3Sc2(Ga,Al)3O12 [21], Lu3(Ga,Al)5O12 [23,24], Gd3Sc2Ga3O12, Lu3Sc2Ga3O12 [24] Na2CaSn2Ge3O12 [25,26], Na2CaTi2Ge3O12 [26] Ca3Ga2Ge3O12 [27] and others. The mechanism of persistent luminescence in garnets is mainly speculated to be related to recombination of intrinsic electron and hole centres [25,28] or impurity related charge centres [24,26].…”

Section: Introductionmentioning

confidence: 99%