Energy migration in YBO 3 :Yb 3+ ,Tb 3+ materials: Down- and upconversion luminescence studies

Grzyb, Tomasz; Kubasiewicz, Konrad; Szczeszak, Agata; Lis, Stefan

doi:10.1016/j.jallcom.2016.06.230

Cited by 24 publications

(5 citation statements)

References 61 publications

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“…出可见光的荧光材料, 其发光本质是一种反 Stokes 发光现象 [1] 。由于稀土离子掺杂的上转换发光材料具有特殊的发光性质, 使其在 3D 成像 [2] 、光纤拉丝材料 [3] 、温度传感 [4] 、彩色显示 [5] 和生物成像 [6] [7][8] 。在几种常见的上转换共掺杂体系中, 主要以 980 nm 激光器作为激发光源, 这是因为 Yb 3+ 的 2 F 5/2 与 2 F 7/2 之间的能级差刚好与 980 nm 光子的能量吻合, 并且 2 F 5/2 激发态具有较宽的吸收截面 [9] , 因此可与 Er 3+ 、Tm 3+ 及 Ho 3+ 等多种稀土离子的激发态匹配, 进而实现能量传递。但 980 nm 波长恰好处于水的波长吸收范围, 生物组织中的水会吸收该波长的光并转化成热, 造成局部过热, 在造成生物组织损伤的同时还会降低对组织的穿透深度 [10] , 这也成为上转换材料走向实际应用亟待解决的问题之一。值得注意的是, 水分子在 800 nm 附近的吸收很弱, 但 Yb 3+ 离子的能级与该波长并不匹配, 无法有效地完成能量传递, 因此需要引入新的共掺杂体系。Dy 3+…”

Section: 上转换发光材料即在红外光辐射激发下能发unclassified

Multicolor Upconversion Emission Tuning of NaY(WO₄)₂: Dy³⁺ via Er³⁺ Doping

史忠祥¹,

王晶²,

关昕³

2018

Journal of Inorganic Materials

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A series of Dy 3+ and Er 3+ co-doped NaY(WO 4) 2 phosphors were synthesized by hydrothermal reactions. X-ray diffraction and scanning electron microscope were used to characterize their crystal structure and morphology. The upconversion luminescent properties and the fluorescence lifetime of 4 F 9/2 → 6 H 13/2 transition of the Dy 3+ ion were also investigated. Moreover, the energy transfer from Dy 3+ to Er 3+ ions in NaY(WO 4) 2 : Dy 3+ , Er 3+ was analyzed in detail. The results indicated that all the samples had pure tetragonal crystal structure. Furthermore, the micrometersized needle spheres and excellent dispersion of the particles were obtained by adding polyethylene glycol (PEG-2000) as surfactant. Under near infrared light excitation at 780 nm, the NaY(WO 4) 2 : Dy 3+ , Er 3+ samples exhibited blue emission at 480 nm (4 F 9/2 → 6 H 15/2 transition of Dy 3+), yellow emission at 576 nm (4 F 9/2 → 6 H 13/2 transition of Dy 3+) and green emission at 531 and 554 nm (2 H 11/2 → 4 I 15/2 and 4 S 3/2 → 4 I 15/2 transition of Er 3+ , respectively). The energy transfer process from Dy 3+ to Er 3+ is a resonant transfer, in which electric dipole-dipole interaction plays a leading role. By adjusting the doping concentration of Er 3+ in NaY(WO 4) 2 : 1.0mol% Dy 3+ , xmol% Er 3+ phosphors, conversion from quasi white light to blue light can be realized.

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Section: 上转换发光材料即在红外光辐射激发下能发unclassified

Multicolor Upconversion Emission Tuning of NaY(WO₄)₂: Dy³⁺ via Er³⁺ Doping

史忠祥¹,

王晶²,

关昕³

2018

Journal of Inorganic Materials

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“…For the Yb 3+ /Tb 3+ dopants, the mechanism of up-conversion is called cooperative energy transfer (CET), two excited Yb 3+ (sensitizer) ions simultaneously transfer their energy to one Tb 3+ (activator) ion, and the Tb 3+ is excited to the 5 D4 level. In previous literatures, some works had been done in Yb 3+ /Tb 3+ co-doped materials [19][20][21][22]. However, Yb 3+ /Tb 3+ co-doped YAG crystal has never been reported.…”

Section: Introductionmentioning

confidence: 99%

Up-conversion properties of Yb,Tb:YAG single crystals grown by the micro-pulling-down method

Liu

Song

et al. 2022

Journal of Luminescence

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“…It follows that Yb 3+ is a great sensitizer to enhance the pump efficiency in up-conversion luminescence. In recent years, after the study of activators such as Er 3+ , Ho 3+ , and Tm 3+ , the up-conversion luminescence of Yb 3+ -Tb 3+ co-doped in various samples has gained increasing attention due to the high energy-transfer efficiency from Yb 3+ to Tb 3+ and green luminescence (~543 nm) from 5 D 4 → 7 F 5 transition in Tb [25][26][27][28]. However, for the Yb 3+ /Tb 3+ dopants, the mechanism of up-conversion is cooperative energy transfer (CET) which differs from remaining.…”

Section: Introductionmentioning

confidence: 99%

“…CET derives from the too large energy gap between the ground state and the first excited state of Ln 3+ . Only some host compounds are suitable to support the relatively rare process [26]. In the present paper, green-emitting LaNbO 4 co-doped with Yb 3+ and Tb 3+ was prepared by a facile sol-gel and combustion method.…”

Section: Introductionmentioning

confidence: 99%

Luminescence, energy transfer, and up-conversion mechanisms of Yb3+ and Tb3+ co-doped LaNbO4

Huang

Wang

Zhou

et al. 2017

Journal of Alloys and Compounds

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Novel green-emitting Yb 3+ and Tb 3+ co-doped LaNbO 4 particles were prepared through a facile sol-gel and combustion method. X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), thermogravimetric and differential thermal analysis (TG-DTA), up-conversion luminescence (UCL) with different powers and varied concentrations, and luminescent lifetimes were employed to test the prepared samples. The XRD data exhibit that a sample with high crystallinity can be acquired at 1000 °C. FE-SEM images show homogeneous and spherical grains after Yb 3+ and Tb 3+ are co-doped in the LaNbO 4 samples. TG-DTA reveals that the LaNbO 4 synthetic process is accompanied by a temperature increase. In our work, we utilize a 980 nm laser to excite Yb 3+ ions to achieve the 2 F 7/2 → 2 F 5/2 transition, and the LaNbO 4 :Yb 3+ , Tb 3+ sample exhibits intense green emission. Luminescent spectra at different powers demonstrated the two-photon absorption process; meanwhile, the corresponding energy transfer mechanism from Yb 3+ to Tb 3+ and the emission of Tb 3+ under 980 nm laser excitation was described via an energy level diagram. Moreover, concentration-dependent up-conversion luminescent properties were systematically explored, and it was confirmed that LaNbO 4 :0.15Yb 3+ ,0.02Tb 3+ exhibits the strongest luminescent properties. In particular, as the content of Yb 3+ ions increases, the 5 D 4 → 7 F 6 transition quickly becomes stronger, resulting in the emitted color shifting from green to blue. Therefore, the emitted color can be tuned by adjusting the content of Yb 3+ ions. The excellent up-conversion emission properties of the obtained samples allow for their potential application in the fields of 3D display technologies and 3 solid-state lasers.

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Energy migration in YBO 3 :Yb 3+ ,Tb 3+ materials: Down- and upconversion luminescence studies

Cited by 24 publications

References 61 publications

Multicolor Upconversion Emission Tuning of NaY(WO₄)₂: Dy³⁺ via Er³⁺ Doping

Multicolor Upconversion Emission Tuning of NaY(WO₄)₂: Dy³⁺ via Er³⁺ Doping

Up-conversion properties of Yb,Tb:YAG single crystals grown by the micro-pulling-down method

Luminescence, energy transfer, and up-conversion mechanisms of Yb3+ and Tb3+ co-doped LaNbO4

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Energy migration in YBO 3 :Yb 3+ ,Tb 3+ materials: Down- and upconversion luminescence studies

Cited by 24 publications

References 61 publications

Multicolor Upconversion Emission Tuning of NaY(WO4)2: Dy3+ via Er3+ Doping

Multicolor Upconversion Emission Tuning of NaY(WO4)2: Dy3+ via Er3+ Doping

Up-conversion properties of Yb,Tb:YAG single crystals grown by the micro-pulling-down method

Luminescence, energy transfer, and up-conversion mechanisms of Yb3+ and Tb3+ co-doped LaNbO4

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Resources

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Multicolor Upconversion Emission Tuning of NaY(WO₄)₂: Dy³⁺ via Er³⁺ Doping

Multicolor Upconversion Emission Tuning of NaY(WO₄)₂: Dy³⁺ via Er³⁺ Doping