Spectra and long-lasting properties of Sm3+-doped yttrium oxysulfide phosphor

Lei, Bingfu; Liu, Yingliang; Tang, Guiqian; Ye, Zeren; Shi, Chen

doi:10.1016/j.matchemphys.2004.06.002

Cited by 95 publications

(34 citation statements)

References 14 publications

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“…However, the sulfide phosphors are not stable and not bright enough for many applications. Therefore, industrial production of long-afterglow phosphors has been switched to rare-earth-ions doped alkali earth aluminates and oxysulfide based phosphors, such as SrAl 2 O 4 :Eu, Dy (green) [4], CaAl 2 O 4 :Eu, Nd (blue) [5], rare-earth-ions doped oxysulfide yttrium (red or reddish-orange) [6][7][8] and Dy 3+ , Mn 2+ -codoped Mg 2 SiO 4 (red) [9]. The brightness of these phosphors is greatly improved compared with that of the previous sulfide phosphors and without doping any radioactive materials.…”

Section: Introductionmentioning

confidence: 99%

Luminescence properties of a Tb3+ activated long-afterglow phosphor

Liu

Che

et al. 2009

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Luminescence properties of a Tb3+ activated long-afterglow phosphor

Liu

Che

et al. 2009

Journal of Alloys and Compounds

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“…[45,46] It is often ascribed to a nonradiative energy transfer from one activator to another, the probability of which increases with increasing activator concentration. [47] Blasse [48,49] indicated that the nonradiative energy transfer can be expressed by the critical transfer distance (R c ), which represents the distance between the activators to the quenching concentration noted x c . R c is calculated by the following equation:…”

Section: Luminescent Propertiesmentioning

confidence: 99%

Structural Characterization and Photoluminescent Properties of (La_1–xSm_x)₂Ti₂O₇ Solid Solutions Synthesized by a Sol–Gel Route

et al. 2011

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Keywords: Perovskite phases / Sol-gel processes / Luminescence / Density functional calculations / X-ray diffraction / Raman spectroscopy A series of compounds with the general formula (La 1-x Sm x ) 2 -Ti 2 O 7 (0 Յ x Յ 1.0) has been synthesized by a sol-gel method and characterized by XRD, Raman spectroscopy, and scanning electron microscopy (SEM). These compounds are structurally isomorphic to perovskite-type La 2 Ti 2 O 7 until a substitution rate of x = 0.8. Above this substitution rate (x Ͼ 0.8), a biphasic mixture is obtained between the substituted perovskite layered phase and the pyrochlore Sm 2 Ti 2 O 7 phase. The unusual phosphor (La 1-x Sm x ) 2 Ti 2 O 7 has been elaborated and its luminescent properties were investigated for low rates of substitution. The emission and excitation spectra were used to study the luminescent properties. The

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“…The afterglow time and the brightness performance of red phosphor are far less than those of green and blue materials. The progress in developing the red afterglow material is slow [1][2][3]. Rare earth ions and some trivalent ions, such as Sm 3+ , Eu 3+ , Eu 2+ , Tb 3+ , Dy 3+ , and Bi 3+ , are good luminescent activators for their abundant energy levels.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and luminescence properties of Eu3+, Sm3+ doped (Y x Gd1−x )2O3:Si4+, Mg2+ long-lasting phosphor

Liu

Wang

et al. 2010

Int J Miner Metall Mater

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A novel red long-lasting phosphor, (Y 1−x Gd x ) 2 O 3 :Eu 3+ , Sm 3+ , Si 4+ , Mg 2+ , was synthesized by the co-precipitation method using oxalate precipitation as the precursor. X-ray diffraction (XRD), scanning electronic microscopy (SEM), integrated thermal analyzer (TG), and photoluminescence spectra (PL) as well as the ST-900PM weak light photometer were used to study the synthesis conditions, morphology, luminescence properties, and the decay time of the phosphor. The XRD results show that the products synthesized at 1400°C for 4 h have good crystallization without any detectable impurity phases. Based on the PL spectra, the optimal conditions are as the following. The molar ratios of Y 3+ to Gd 3+ and Eu 3+ to Sm 3+ are 2:8 and 3:1, respectively, and the contents of Mg 2+ and SiO 2 are 5mol% and 3mol%, respectively. The decay time monitored by the ST-900PM weak light photometer is 7200 s, increasing 44% and 100%, respectively, compared with the Eu 3+ and Sm 3+ single-doped phosphors. The results indicate that the energy transfer is from Sm 3+ to Eu 3+ ion, and Sm 3+ is a good sensitizer to Eu 3+ .

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Spectra and long-lasting properties of Sm3+-doped yttrium oxysulfide phosphor

Cited by 95 publications

References 14 publications

Luminescence properties of a Tb3+ activated long-afterglow phosphor

Luminescence properties of a Tb3+ activated long-afterglow phosphor

Structural Characterization and Photoluminescent Properties of (La_1–xSm_x)₂Ti₂O₇ Solid Solutions Synthesized by a Sol–Gel Route

Synthesis and luminescence properties of Eu3+, Sm3+ doped (Y x Gd1−x )2O3:Si4+, Mg2+ long-lasting phosphor

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Spectra and long-lasting properties of Sm3+-doped yttrium oxysulfide phosphor

Cited by 95 publications

References 14 publications

Luminescence properties of a Tb3+ activated long-afterglow phosphor

Luminescence properties of a Tb3+ activated long-afterglow phosphor

Structural Characterization and Photoluminescent Properties of (La1–xSmx)2Ti2O7 Solid Solutions Synthesized by a Sol–Gel Route

Synthesis and luminescence properties of Eu3+, Sm3+ doped (Y x Gd1−x )2O3:Si4+, Mg2+ long-lasting phosphor

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Structural Characterization and Photoluminescent Properties of (La_1–xSm_x)₂Ti₂O₇ Solid Solutions Synthesized by a Sol–Gel Route