(La,Dy)2W2O9 tungstates: Selected synthesis, enhanced luminescence through Gd3+ co-doping, and favorable quantum efficiency

Wang, Xuejiao; Feng, Xiaowen; Gong, Changshui; Sun, Meng; Wang, Chuang; Wang, Qiushi; Li, Ji‐Guang

doi:10.1016/j.apt.2021.12.011

Cited by 3 publications

(1 citation statement)

References 41 publications

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“…2, while the decreased luminescence upon further doping of Gd 3+ ( x = 0.10 and 0.25) may be due to lattice expansion (lower lattice stiffness), which enhances phonon vibration and strengthens phonon–photon coupling to some degree. 36–39 Besides, the intensified distortion of the Bi–O polyhedron by Gd 3+ doping is also harmful to the 3 P 1 → 1 S 0 emission of Bi 3+ , as the transition is parity allowed and can be suppressed to a larger extent by polyhedron distortion. The emission intensity of the x = 0.50 sample is even lower than the Gd 3+ -free one, and this may be due to the multi-phase nature of this sample (Fig.…”

Section: Resultsmentioning

confidence: 99%

Modulation of Bi³⁺ luminescence from broadband green to broadband deep red in Lu₂WO₆ by Gd³⁺ doping and its applications in high color rendering index white LED and near-infrared LED

et al. 2023

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Section: Resultsmentioning

confidence: 99%

Modulation of Bi³⁺ luminescence from broadband green to broadband deep red in Lu₂WO₆ by Gd³⁺ doping and its applications in high color rendering index white LED and near-infrared LED

et al. 2023

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Energy transfer from the [WO₆]⁶⁻ group to Er³⁺ in Lu₂WO₆ and favorable optical thermometry with strong emission color variability

Xue,

Gong,

Yang

et al. 2024

New J. Chem.

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Optical grade (Gd _{0.95-
x}Lu _xEu _0.05) ₃Al ₅O ₁₂ ceramics with near-zero optical loss: Effects of Lu ³⁺ doping on structural feature, microstructure evolution, and far-red luminescence

Sun,

Li,

Qian

et al. 2024

Journal of Advanced Ceramics

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A chemical co-precipitation strategy was employed to synthesize a series of (Gd 0.95−x Lu x Eu 0.05 ) 3 Al 5 O 12 (x = 0.1−0.95) powder phosphors, followed by vacuum sintering to achieve transparent garnet ceramic phosphors. The density functional theory indicated Lu 3 Al 5 O 12 was formed in priority compared with Gd 3 Al 5 O 12 during solid-phase reaction. Upon high-temperature sintering, the Lu 3+ substitution for Gd 3+ suppressed point mass diffusion leading to a smaller grain size. The in-line transmittances of bulk specimens with x = 0.1, 0.3, 0.5, 0.7, and 0.95 nm were ~83.5%, 80.1%, 68.8%, 73.7%, and 82.2% at 710 nm (Eu 3+ emission center), respectively, among which the sample of x = 0.1 exhibited the optical grade with near-zero optical loss in agreement with the defect-free single crystal (~100% of the theoretical transmittance). The resulting particle and ceramic materials both presented characteristic Eu 3+ emission arising from 5 D 0 → 7 F J (J = 1−4) transition, where the dominant far-red emission at ~710 nm arising from 5 D 0 → 7 F 4 transition overlapped with the absorption of phytochrome (P FR ). The photoluminescence excitation and photoluminescence intensities of (Gd 0.95−x Lu x Eu 0.05 ) 3 Al 5 O 12 powders and ceramics generally increased at a higher Gd 3+ /Lu 3+ ratio. Lu 3+ dopants delayed the fluorescence lifetime while the bulk samples had shorter lifetime compared to the particle counterparts. The transparent (Gd 0.85 Lu 0.1 Eu 0.05 ) 3 Al 5 O 12 ceramic phosphor exhibited good thermal stability with a high thermal quenching temperature above 533 K. The designed ceramic phosphor-converted light-emitting diode had a saturation injection current of 435 mA and a current-dependent color rendering index. More importantly, our report marked the developmental stage of transparent ceramic materials towards zero optical loss.

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(La,Dy)2W2O9 tungstates: Selected synthesis, enhanced luminescence through Gd3+ co-doping, and favorable quantum efficiency

Cited by 3 publications

References 41 publications

Modulation of Bi³⁺ luminescence from broadband green to broadband deep red in Lu₂WO₆ by Gd³⁺ doping and its applications in high color rendering index white LED and near-infrared LED

Modulation of Bi³⁺ luminescence from broadband green to broadband deep red in Lu₂WO₆ by Gd³⁺ doping and its applications in high color rendering index white LED and near-infrared LED

Energy transfer from the [WO₆]⁶⁻ group to Er³⁺ in Lu₂WO₆ and favorable optical thermometry with strong emission color variability

Optical grade (Gd _{0.95-
x}Lu _xEu _0.05) ₃Al ₅O ₁₂ ceramics with near-zero optical loss: Effects of Lu ³⁺ doping on structural feature, microstructure evolution, and far-red luminescence

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(La,Dy)2W2O9 tungstates: Selected synthesis, enhanced luminescence through Gd3+ co-doping, and favorable quantum efficiency

Cited by 3 publications

References 41 publications

Modulation of Bi3+ luminescence from broadband green to broadband deep red in Lu2WO6 by Gd3+ doping and its applications in high color rendering index white LED and near-infrared LED

Modulation of Bi3+ luminescence from broadband green to broadband deep red in Lu2WO6 by Gd3+ doping and its applications in high color rendering index white LED and near-infrared LED

Energy transfer from the [WO6]6− group to Er3+ in Lu2WO6 and favorable optical thermometry with strong emission color variability

Optical grade (Gd 0.95- x Lu x Eu 0.05) 3Al 5O 12 ceramics with near-zero optical loss: Effects of Lu 3+ doping on structural feature, microstructure evolution, and far-red luminescence

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Modulation of Bi³⁺ luminescence from broadband green to broadband deep red in Lu₂WO₆ by Gd³⁺ doping and its applications in high color rendering index white LED and near-infrared LED

Modulation of Bi³⁺ luminescence from broadband green to broadband deep red in Lu₂WO₆ by Gd³⁺ doping and its applications in high color rendering index white LED and near-infrared LED

Energy transfer from the [WO₆]⁶⁻ group to Er³⁺ in Lu₂WO₆ and favorable optical thermometry with strong emission color variability

Optical grade (Gd _{0.95-
x}Lu _xEu _0.05) ₃Al ₅O ₁₂ ceramics with near-zero optical loss: Effects of Lu ³⁺ doping on structural feature, microstructure evolution, and far-red luminescence