Afterglow phosphor materials Y2O2S: Eu, Mg, Ti doped with various Gd concentrations

Ji, Tongkun; Jiang, Hongyi; Fei, Chen

doi:10.1016/j.jallcom.2010.04.139

Cited by 29 publications

(8 citation statements)

References 30 publications

(32 reference statements)

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“…The persistent phosphor materials include alkaline earth aluminate monoclinic systems including yellow‐green phosphor (YGP) (SrAl 2 O 4 :Eu,Dy), [ 22 ] purple phosphor (PP) (CaAl 2 O 4 :Eu,Nd), [ 22b,23 ] blue‐green phosphor (Sr 4 Al 4 O 25 :Eu,Dy), [ 22a,24 ] silicate‐type tetragonal crystals system sky blue phosphor (Sr 2 MgSi 2 O 7 ), [ 25 ] and sulfide‐type hexagonal crystal red phosphor (RP) (Y 2 O 2 S:Eu,Mg,Ti). [ 26 ] Taking these phosphor materials with five kinds of colors as examples, we mixed them with the l / d ‐cysteine ( l / d ‐Cys). Upon ball milling under certain conditions, the molecular chirality was found to be transferred to the phosphors, as illustrated in Scheme 1b, and CPP can be obtained.…”

Section: Introductionmentioning

confidence: 99%

Endowing Phosphor Materials with Long‐Afterglow Circularly Polarized Phosphorescence via Ball Milling

Hao

Liu

2021

Advanced Optical Materials

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Circularly polarized luminescent (CPL) materials have emerged as new advanced optical and photonic materials. While many efforts have been devoted to the organic CPL materials, it still remains a challenge to fabricate CPL active inorganic materials due to the difficulty in the introduction of the chiral units. Here, a simple approach for achieving CPL active inorganic persistent phosphor materials is reported. By modifying the inorganic persistent phosphor materials with enantiomeric cysteine via ball milling, the inorganic circularly polarized phosphorescence (CPP) materials with long afterglow characteristics are fabricated. Moreover, the circular polarization of the obtained phosphorescent materials can be controlled by the molecular chirality of the cysteine. The dissymmetry factor (glum) of the CPP materials can be up to 10−2. It is envisaged that this approach will afford a new insight into the designing of the inorganic functional chiral phosphorescent materials.

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Section: Introductionmentioning

confidence: 99%

Endowing Phosphor Materials with Long‐Afterglow Circularly Polarized Phosphorescence via Ball Milling

Hao

Liu

2021

Advanced Optical Materials

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“…The rare earth elements‐doped Sr 2 MgSi 2 O 7 phosphor, as the representative pyrosilicate, has been studied extensively over past decades . These long afterglow materials are capable of absorbing light when excited by a light source, and then emit intense broad band light in the visible range over a long period of time, when brightness and decay times are greatly superior to the traditional long afterglow material, sulphides . In addition, silicate long afterglow materials have many advantages, such as physical and chemical stability, no radiation, long afterglow time, low cost and varied luminescent color .…”

Section: Introductionmentioning

confidence: 99%

Effect of cooling rate on the microstructure and luminescence properties of Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ materials

et al. 2017

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Sr MgSi O :Eu ,Dy long afterglow materials were prepared by a high-temperature solid-state reaction method with different cooling rates. The cooling rate had a slight effect on X-ray diffraction patterns and photoluminescence performance, but significantly modified the grain boundaries and long afterglow properties of the Sr MgSi O :Eu ,Dy materials. When the cooling rate was 1°C/min, grains remained intact with clear grain boundaries. As the cooling rate increased from 1°C/min to 5°C/min, some grain boundaries became indistinguishable. The afterglow properties were optimized, presenting best performance at the cooling rate of 3°C/min. The trap state was investigated and illustrated through thermoluminescence curves. The depths of the traps of all the samples were unchanged, whereas densities changed to a large extent, leading to different afterglow properties. The retrapping process is discussed based on the afterglow curves.

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“…30 Some other lattices have also been reported which involve energy transfer from Gd 3+ to Eu 2+ . 31,32 Thus increase in brightness by the addition of Gd 3+ ion up to 1 mol% is due to the sensitizing action of Gd 3+ . This type of energy transfer between Gd 3+ and Eu 2+ has also been reported, 33 which shows the energy transfer through cross-relaxation from Gd 3+ to Eu 2+ .…”

Section: Photoluminescence Propertiesmentioning

confidence: 99%

Luminescence Properties of Eu²⁺/Eu³⁺Activated Barium Aluminate Phosphors with Gd³⁺Concentration Variation

Marı́

Singh

Verma

et al. 2015

Transactions of the Indian Ceramic Society

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BaAl 2 O 4 :Eu 2+ /Eu 3+ (1 mol %) co-doped with varying concentrations of Gd 3+ (1, 2, 5 and 10 mol%) were prepared by combustion synthesis method at 600 o C. All the compositions were investigated for their structural and photoluminescence properties. Samples prepared in open atmosphere showed the presence of both Eu 3+ and Eu 2+ states which indicates the reduction of Eu 3+ to Eu 2+ during the preparation of these compounds. The prepared materials at 600 o C showed high intense broad peaks around 498 nm corresponding to Eu 2+ and small peaks in the red region which are attributed to the presence of Eu 3+ . In the 1000 o C annealed compounds, the intensity of the peak at 498 nm got increased. The intensity of this broad band for BaAl 2 O 4 :Eu 2+ /Eu 3+ (1 mol%):Gd 3+ (1 mol%) was three times than that of BaAl 2 O 4 :Eu 2+ /Eu 3+ (1 mol%). Thus second rare earth ion (Gd 3+ ) acted as a good sensitizer and enhanced the photoluminescence intensity. The XRD spectra revealed the presence of hexagonal phase of BaAl 2 O 4 as main phase and a small amount of a mixed phase Ba O! 6.6 Al 2 O 3 . Doping of Eu 3+ , Gd 3+ did not change the crystalline structure of barium aluminate (BaAl 2 O 4 ).

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Afterglow phosphor materials Y2O2S: Eu, Mg, Ti doped with various Gd concentrations

Cited by 29 publications

References 30 publications

Endowing Phosphor Materials with Long‐Afterglow Circularly Polarized Phosphorescence via Ball Milling

Endowing Phosphor Materials with Long‐Afterglow Circularly Polarized Phosphorescence via Ball Milling

Effect of cooling rate on the microstructure and luminescence properties of Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ materials

Luminescence Properties of Eu²⁺/Eu³⁺Activated Barium Aluminate Phosphors with Gd³⁺Concentration Variation

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Afterglow phosphor materials Y2O2S: Eu, Mg, Ti doped with various Gd concentrations

Cited by 29 publications

References 30 publications

Endowing Phosphor Materials with Long‐Afterglow Circularly Polarized Phosphorescence via Ball Milling

Endowing Phosphor Materials with Long‐Afterglow Circularly Polarized Phosphorescence via Ball Milling

Effect of cooling rate on the microstructure and luminescence properties of Sr2MgSi2O7:Eu2+,Dy3+ materials

Luminescence Properties of Eu2+/Eu3+Activated Barium Aluminate Phosphors with Gd3+Concentration Variation

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Effect of cooling rate on the microstructure and luminescence properties of Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ materials

Luminescence Properties of Eu²⁺/Eu³⁺Activated Barium Aluminate Phosphors with Gd³⁺Concentration Variation