Persistent luminescence in Ca8Zn(SiO4)4Cl2:Eu2+

Yadav, P. J.; Joshi, C.; Moharil, S. V.

doi:10.1016/j.jlumin.2012.05.033

Cited by 17 publications

(4 citation statements)

References 15 publications

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“…As reported earlier, the decay process contains the rapid-decaying process and the slow-decaying process, the decay curves of the samples can be evaluated by fitting into double exponential equation which reflects the trend of the decay. The form of the equation is as follow [28,29]: (1) where, I is the phosphorescent intensity, I 1 and I 2 are the constants, t is the time, τ 1 and τ 2 are the decay constants, respectively. The fitting results of the parameters of τ 1 and τ 2 are listed in Table 1.…”

Section: Measurement Techniquesmentioning

confidence: 99%

Luminescent properties of R+ doped Sr2MgSi2O7: Eu2+, Dy3+ (R+ = Li+, Ag+) phosphors

Xiao

Zhou

Liu

et al. 2017

Journal of Alloys and Compounds

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Long afterglow phosphor Sr 2 MgSi 2 O 7 : Eu 2+ , Dy 3+ doped with R + (R + = Li + , Ag + , respectively) was synthesized by the high temperature solid-state reaction method. Crystal structure, morphological and luminescent properties were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM), photoluminescence (PL), decay curves and thermoluminescence (TL) curves. The results indicate that the incorporation of these metal ions have no influence on the position of the emission peak which is determined by the 4f 7 →4f 6 5d 1 Eu 2+ ions, but have influence on the intensity of the emission and the afterglow. The highest phosphorescent intensity was observed with 2.5 mol％ of Li + , and 0.4 mol％ of Ag + doping in respectively. Compared with the undoped sample, the optimum incorporation of Li + ions could induce a remarkable increase of phosphorescent intensity and the decay constant by about 1.5 times and 1.6 times, respectively. Doping Ag + ions can also improve the luminescence properties, but the performance is not good as Li + ions. The mechanism of Sr 2 MgSi 2 O 7 :

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Section: Measurement Techniquesmentioning

confidence: 99%

Luminescent properties of R+ doped Sr2MgSi2O7: Eu2+, Dy3+ (R+ = Li+, Ag+) phosphors

Xiao

Zhou

Liu

et al. 2017

Journal of Alloys and Compounds

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“…phosphor. [138] The phosphor Ca 8 Zn(SiO 4 ) 4 Cl 2 :Eu has been studied extensively for its efficiency. The efficiency of this phosphor depends on the Ca to Zn ratio.…”

Section: Yadav Et Al Reported the Persistent Luminescence In Thismentioning

confidence: 99%

Review of Cholorosilicates as Phosphor Hosts

Sharma

Moharil

2023

Cryst. Res. Technol.

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Silicates and halides have been known to be good luminescent materials for long. These two types of hosts have some positive aspects and certain drawbacks, for example, though silicates are stable, they require relatively higher synthesis temperatures. Halide lattices are better suited for several applications like optically stimulated luminescence, thermoluminescence, scintillation, etc. and defects/color center/exciton formation is important. Halides have lower melting points as well. On the other hand, except for fluorides, other halides are quite hygroscopic. Stability in the ambient can pose some problems in applications and some measures for protection have to be taken. To enjoy the benefits of both silicates and halides, chlorosilicate lattices can be suitable. Chlorosilicates can be synthesized at significantly lower temperatures as compared to silicates. They are also less hygroscopic than the constituent chlorides. Research work on chlorosilicates is not as extensive as that on silicates and halides. These are promising luminescent materials whose potential remains still unexploited. A review of various chlorosilicate phases, i.e., of the studies on synthesis, crystal structures, luminescence etc. already carried out, is presented here with the objective of providing impetus to research work on chlorosilicates.

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“…Alkaline earths chlorosilicate is a kind of matrix material with excellent physics and chemical properties and it possesses better PL properties when doped with different rare‐earth activators . The properties of phosphor can be modulated by varying the activators ions, anion, and cation of host . It is well known that the Eu 3+ ions is often used as an activator of red‐emitting luminescent materials due to its special 5 D 0 ‐ 7 F 1 and 5 D 0 ‐ 7 F 2 transitions .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and luminescent properties of Sr_4−xSi₃O₈Cl₄: xEu³⁺ red phosphor by hydrothermal method

Zhi-ren

Zheng

Hou

et al. 2017

Int J Applied Ceramic Tech

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Sr4‐xSi3O8Cl4:xEu3+ (SSOC:Eu3+) phosphors were successfully synthesized by hydrothermal method. The crystallization of this phosphor was analyzed by means of X‐ray diffraction patterns. The size and morphology were recorded using SEM patterns of samples. And the PLE and PL spectra were characterized by a PL spectrophotometer. Excited by 394 nm UV light, the intense red emission is recognized in SSOC:Eu3+ phosphor and the main emission peak located at 620 nm. The influences of Eu3+ concentration, pH value of reaction solution, and charge compensator on PL spectra of SSOC:Eu3+ phosphors were investigated. The results revealed that this red phosphor had potential applications for white LEDs.

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Persistent luminescence in Ca8Zn(SiO4)4Cl2:Eu2+

Cited by 17 publications

References 15 publications

Luminescent properties of R+ doped Sr2MgSi2O7: Eu2+, Dy3+ (R+ = Li+, Ag+) phosphors

Luminescent properties of R+ doped Sr2MgSi2O7: Eu2+, Dy3+ (R+ = Li+, Ag+) phosphors

Review of Cholorosilicates as Phosphor Hosts

Synthesis and luminescent properties of Sr_4−xSi₃O₈Cl₄: xEu³⁺ red phosphor by hydrothermal method

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Persistent luminescence in Ca8Zn(SiO4)4Cl2:Eu2+

Cited by 17 publications

References 15 publications

Luminescent properties of R+ doped Sr2MgSi2O7: Eu2+, Dy3+ (R+ = Li+, Ag+) phosphors

Luminescent properties of R+ doped Sr2MgSi2O7: Eu2+, Dy3+ (R+ = Li+, Ag+) phosphors

Review of Cholorosilicates as Phosphor Hosts

Synthesis and luminescent properties of Sr4−xSi3O8Cl4: xEu3+ red phosphor by hydrothermal method

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Product

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Synthesis and luminescent properties of Sr_4−xSi₃O₈Cl₄: xEu³⁺ red phosphor by hydrothermal method