A single-phase white-emitting La(BO3,PO4):Dy3+ phosphor with high thermostability

Song, Ruitong; Zhang, Zhuohui; Li, Hong; Luo, Zhenyu; Yang, Jian; Ma, Jie; Xiang, Xianfeng; Zeng, Qing; Zhu, Jing

doi:10.1016/j.ceramint.2022.10.075

Cited by 19 publications

(7 citation statements)

References 52 publications

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“…The emission spectrum of Dy 3+ has four distinct emission bands, with peak values located at 492, 577, 666, and 756 nm. These peaks correspond to the transition from 4 F 9/2 to 6 H 15/2 , 6 H 13/2 , 6 H 11/2 , and 6 H 9/2 [ 14 , 28 ], respectively. The emission intensity initially increases and then decreases with the doping concentration of Dy 3+ .…”

Section: Resultsmentioning

confidence: 99%

“…Sharp excitation peaks are visible in the excitation spectrum of KYC:3%Dy 3+ . These peaks are observed at 325, 339, 351, 365, 386, 428, 453, and 476 nm and correspond to the transition of Dy 3+ from 6 H 15/2 to 6 P 3/2 , 4 I 9/2 , 6 P 7/2 , 6 P 5/2 , 4 I 13/2 , 4 G 11/2 , 4 I 15/2 , and 4 F 9/2 [ 5 , 28 ], respectively. When Ce 3+ was added to KYC:3%Dy 3+ , two broad absorption peaks were detected at 274 and 340 nm (monitoring at 577 nm), which belong to the energy transition of Ce 3+ from 4f to 5d [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

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Fixed Yellow-to-Blue Intensity Ratio of Dy3+ in KY(CO3)2 Host for Emission Color Tuning

Huang,

Qian,

Sun

et al. 2024

Materials

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Dy3+, Ce3+ co-doped KY(CO3)2 phosphors with a monoclinic structure were synthesized using the hydrothermal method to create a fixed yellow-to-blue ratio emission. The [YO8] polyhedron, consisting of a Y atom and eight oxygen atoms, forms a relatively independent microstructure within the KY(CO3)2 host. Y3+ ions are partially replaced by Ce3+ or Dy3+ ions to construct the [CeO8] or [DyO8] polyhedral fluorescence emission unit. The spectral measurements indicate that Ce3+ and Dy3+ can maintain relatively independent fluorescence emission characteristics in the KY(CO3)2 host. The yellow-to-blue intensity ratio of Dy3+ remains close to 1 and does not change with the variation in the doping concentration of KY(CO3)2:Dy3+ and KY(CO3)2:Dy3+,Ce3+ phosphors. When Ce3+ and Dy3+ are co-doped with KY(CO3)2, the emission intensities of Dy3+ under 339 nm and 365 nm excitation increase by 8.43 and 2.32 times, respectively, through resonance energy transfer and cross-relaxation. All Ce3+-doped KY(CO3)2:Dy3+ phosphors can emit white light. Among them, the emitted light of KY(CO3)2:3%Dy3+,5%Ce3+ is closest to standard daylight. Therefore, a stable [YO8] polyhedral structure can be used to achieve more color tuning of light.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Fixed Yellow-to-Blue Intensity Ratio of Dy3+ in KY(CO3)2 Host for Emission Color Tuning

Huang,

Qian,

Sun

et al. 2024

Materials

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“…Table 1 presents detailed data. The value of Y/B in the table decreases with increasing concentration of Dy 3+ , [ 8,20,21 ] reaching its closest value to 1 at x = 0.05, with the color being closest to white, benefiting from the unique lattice symmetry of GBPO. Subsequently, as the concentration continues to rise, the color gradually returns to yellow.…”

Section: Resultsmentioning

confidence: 99%

“…6 H 13/2 (magnetic dipole) transitions. [8][9][10] The luminescence of Dy 3þ is closely associated with the coordination environment, which can be modulated by altering the structure and doping of the host. It is an important activator ion for single-phase white light output.…”

Section: Introductionmentioning

confidence: 99%

“…[ 5–7 ] The Dy 3+ ion exhibits two main emission bands, centered at 488 and 574 nm, respectively, corresponding to the 4 F 9/2 → 6 H 15/2 (electrical dipole) and 4 F 9/2 → 6 H 13/2 (magnetic dipole) transitions. [ 8–10 ] The luminescence of Dy 3+ is closely associated with the coordination environment, which can be modulated by altering the structure and doping of the host. It is an important activator ion for single‐phase white light output.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Single‐Phase White Phosphor Gd₇O₆(BO₃)(PO₄)₂:Dy³⁺

Zhao

Guo

Liu

et al. 2023

Physica Status Solidi (b)

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A series of Gd7O6(BO3)(PO4)2:xDy3+ phosphors are synthesized using high‐temperature solid‐phase method. The phase and spectral characteristics of phosphors are analyzed using X‐ray diffraction and spectrometer. It is found that the ratio of the light intensity corresponding to the electric dipole and magnetic dipole can regulate the color of the photoluminescence, and the optimal concentration x = 0.05 reaches 1.0834, which is very close to white light. This phenomenon is related to the symmetry of the lattice. Simultaneously, it is observed that the fluorescence decay lifetime decreases with increasing concentration. The Commission Internationale de l'Eclairage coordinates obtained from the measured color of the sample are also very close to the standard white light coordinates (0.3333, 0.3333). The results presented above suggest that Gd7O6(BO3)(PO4)2:xDy3+ is a promising candidate for the next generation of white light‐emitting diodes.

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Structural and Photoluminescence Characteristics of a Novel Single‐Phase White‐Emitting Phosphor SrBi₂Nb₂O₉:Dy³⁺

Yang,

Cui,

Zhang

et al. 2024

Physica Status Solidi (b)

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A group of white light‐emitting phosphors SrBi2Nb2O9:xDy3+ (SBN:xDy3+) are prepared by high‐temperature solid reaction. The crystal phase, morphology, and photoluminescence (PL) characteristics of the prepared SBN:xDy3+ are analyzed. The X‐ray diffraction results prove that the synthesized samples are pure phase, in which the shift of the main peak depicted that crystal interplanar distance decreases after Dy3+ replacing Bi3+. The scanning electron microscope results show that the average crystal size of the sample is ≈1–10 μm. Energy dispersive X‐ray spectroscopy shows that the ratio of element composition of the SBN:xDy3+ is similar to the theoretical calculation. The PL excitation illustrates the excitation peaks mainly exist at 389, 399, 426, and 450 nm due to the transitions of Dy3+. For PL, the emission peaks of samples with different doping concentrations are centered at 479 and 573 nm. The ratio of yellow intensity to blue intensity indicates that Dy3+ is located at a high symmetry site, which has the possibility to produce suitable white light. The Commission Internationale de l’Eclairage coordinates of the SBN:xDy3+ are located near the standard white light coordinate. All these results prove that SrBi2Nb2O9:xDy3+ can be a potential material in the white light application.

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A single-phase white-emitting La(BO3,PO4):Dy3+ phosphor with high thermostability

Cited by 19 publications

References 52 publications

Fixed Yellow-to-Blue Intensity Ratio of Dy3+ in KY(CO3)2 Host for Emission Color Tuning

Fixed Yellow-to-Blue Intensity Ratio of Dy3+ in KY(CO3)2 Host for Emission Color Tuning

A Novel Single‐Phase White Phosphor Gd₇O₆(BO₃)(PO₄)₂:Dy³⁺

Structural and Photoluminescence Characteristics of a Novel Single‐Phase White‐Emitting Phosphor SrBi₂Nb₂O₉:Dy³⁺

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A single-phase white-emitting La(BO3,PO4):Dy3+ phosphor with high thermostability

Cited by 19 publications

References 52 publications

Fixed Yellow-to-Blue Intensity Ratio of Dy3+ in KY(CO3)2 Host for Emission Color Tuning

Fixed Yellow-to-Blue Intensity Ratio of Dy3+ in KY(CO3)2 Host for Emission Color Tuning

A Novel Single‐Phase White Phosphor Gd7O6(BO3)(PO4)2:Dy3+

Structural and Photoluminescence Characteristics of a Novel Single‐Phase White‐Emitting Phosphor SrBi2Nb2O9:Dy3+

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Product

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A Novel Single‐Phase White Phosphor Gd₇O₆(BO₃)(PO₄)₂:Dy³⁺

Structural and Photoluminescence Characteristics of a Novel Single‐Phase White‐Emitting Phosphor SrBi₂Nb₂O₉:Dy³⁺