Luminescence and energy transfer of warm white-emitting phosphor Mg2Y2Al2Si2O12:Dy3+,Eu3+ for white LEDs

Zhang, Zhu; Tao, Chunjing; Wang, Zhijun; Yang, Zhiping; Li, Panlai

doi:10.1039/d1ra06215h

Cited by 21 publications

(7 citation statements)

References 42 publications

(54 reference statements)

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“…A warm white LED device based on Mg 2 Y 1.88 Al 2 Si 2 O 12 :0.05Dy 3+ ,0.07Eu 3+ , and a UV LED chip (370 nm) showed white emission with CIE (0.4071, 0.3944), CCT = 3500 K and CRI = 91.3. 228…”

Section: Eu3+ Based Phosphors With Scheelite and Double Perovskite Re...mentioning

confidence: 99%

Recent progress in trivalent europium (Eu³⁺)-based inorganic phosphors for solid-state lighting: an overview

Singh¹,

Pradhan²,

Priya³

et al. 2023

Dalton Trans.

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Section: Eu3+ Based Phosphors With Scheelite and Double Perovskite Re...mentioning

confidence: 99%

Recent progress in trivalent europium (Eu³⁺)-based inorganic phosphors for solid-state lighting: an overview

Singh¹,

Pradhan²,

Priya³

et al. 2023

Dalton Trans.

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“…4 F 9/2 → 6 H 15/2 and 6 H 13/2 correspond to magnetic and electric dipole transitions, respectively. 32 In general, when the blue light intensity is high, Dy 3+ occupies the position of the center of the inverse symmetry, and the magnetic dipole occurs preferentially; when the yellow light intensity is high, Dy 3+ occupies the low symmetry position, and the electric dipole occurs preferentially. The illustration is a line graph of the luminous intensity of 481 nm (blue light) and 581 nm (yellow light) at different Dy 3+ ion concentrations.…”

Section: Photoluminescence Propertiesmentioning

confidence: 99%

Garnet Structure-Activated Warm White Light Phosphors Ca₃Al₂Ge₃O₁₂: Dy³⁺, Eu³⁺ with Ultrahigh Thermal Stability and Tunable Luminescence

Zhou,

Chen,

Jiang

et al. 2024

Inorg. Chem.

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A series of Ca 3 Al 2 Ge 3 O 12 : xDy 3+ , yEu 3+ phosphors were successfully prepared by the high-temperature solid-phase method. The phase and morphology of the phosphors were studied by means of Rietveld refinement and scanning electron microscopy. The results show that the phase is pure, and the crystal structure is the Ia3̅ d space group. In the Ca 3 Al 2 Ge 3 O 12 : xDy 3+ phosphors, using 380 nm excitation, phosphors showed blue ( 4 F 9/2 → 6 H 15/2 ) and yellow ( 4 F 9/2 → 6 H 13/2 ) emission peaks at 481 and 581 nm, respectively. In Ca 3 Al 2 Ge 3 O 12 : xDy 3+ , yEu 3+ phosphors, the energy transfer was inferred by the spectrum overlap of Dy 3+ and Eu 3+ , and the lifetime attenuation was analyzed from the perspective of dynamics; finally, the band gap structure of the phosphors was analyzed by combining diffuse reflection spectra with the first principle, and the energy transfer mechanism and luminescence mechanism were elaborated by combining theory and practice. The transition from blue white light to red light can be achieved by tuning the range of y in Ca 3 Al 2 Ge 3 O 12 : 0.015Dy 3+ , yEu 3+ . Wherein, when y = 0.07, phosphors, the chromaticity coordinate of warm white CIE is (0.3932, 0.3203), the color temperature is 3093 K, and the warm white light is synthesized. The thermal stability of the synthesized warm white phosphors is 90.1% (423 K), the thermal sensing factors are S amax = 5.51 × 10 −4 K −1 (303 K) and S rmax = 0.0359% K −1 (303 K), and the actual quantum efficiency is IQE = 52.48%. These results prove that Ca 3 Al 2 Ge 3 O 12 : Dy 3+ , Eu 3+ have good application prospects as singlecomponent warm w-LED devices.

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“…The activator ions include, but are not limited to, Ce 3+ , Eu 2+ , Bi 3+ , Eu 3+ , Mn 2+ , Dy 3+ , etc. [ 16 , 17 , 18 , 19 , 20 , 21 ] Various luminescence and its modification are achieved due to the multi-site doping, local structure tuning and energy transfer.…”

Section: Multi-site Luminescence Of Phosphorsmentioning

confidence: 99%

Recent Advances in Multi-Site Luminescent Materials: Design, Identification and Regulation

2023

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The development of novel phosphor materials with excellent performance and modification of their photoluminescence to meet the higher requirements for applications are the essential research subjects for luminescent materials. Multi-site luminescent materials with crystallographic sites for the activator ions that broaden the tunable range of luminescent spectra and even enhance the luminescent performance have attracted significant attention in the pursuit of high-quality luminescence for white light-emitting diodes. Here, we summarize multi-site luminescence characteristics based on the different kinds of host and activator ions, introduce the identifications of multi-site activator ions via optical analysis, provide a structural analysis and theoretical calculation methods, and introduce the regulation strategies and advance applications of multi-site phosphors. The review reveals the relationship between crystal structure and luminescent properties and discusses future opportunities for multi-site phosphors. This will provide guidance for the design and development of luminescent materials or other materials science.

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Luminescence and energy transfer of warm white-emitting phosphor Mg₂Y₂Al₂Si₂O₁₂:Dy³⁺,Eu³⁺ for white LEDs

Abstract: MYAS:xDy3+,yEu3+ can produce warm white light with CIE chromaticity coordinates of (0.4071, 0.3944) and relative color temperature of 3500 K.

Cited by 21 publications

References 42 publications

Recent progress in trivalent europium (Eu³⁺)-based inorganic phosphors for solid-state lighting: an overview

Recent progress in trivalent europium (Eu³⁺)-based inorganic phosphors for solid-state lighting: an overview

Garnet Structure-Activated Warm White Light Phosphors Ca₃Al₂Ge₃O₁₂: Dy³⁺, Eu³⁺ with Ultrahigh Thermal Stability and Tunable Luminescence

Recent Advances in Multi-Site Luminescent Materials: Design, Identification and Regulation

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Luminescence and energy transfer of warm white-emitting phosphor Mg2Y2Al2Si2O12:Dy3+,Eu3+ for white LEDs

Abstract: MYAS:xDy3+,yEu3+ can produce warm white light with CIE chromaticity coordinates of (0.4071, 0.3944) and relative color temperature of 3500 K.

Cited by 21 publications

References 42 publications

Recent progress in trivalent europium (Eu3+)-based inorganic phosphors for solid-state lighting: an overview

Recent progress in trivalent europium (Eu3+)-based inorganic phosphors for solid-state lighting: an overview

Garnet Structure-Activated Warm White Light Phosphors Ca3Al2Ge3O12: Dy3+, Eu3+ with Ultrahigh Thermal Stability and Tunable Luminescence

Recent Advances in Multi-Site Luminescent Materials: Design, Identification and Regulation

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Luminescence and energy transfer of warm white-emitting phosphor Mg₂Y₂Al₂Si₂O₁₂:Dy³⁺,Eu³⁺ for white LEDs

Recent progress in trivalent europium (Eu³⁺)-based inorganic phosphors for solid-state lighting: an overview

Recent progress in trivalent europium (Eu³⁺)-based inorganic phosphors for solid-state lighting: an overview

Garnet Structure-Activated Warm White Light Phosphors Ca₃Al₂Ge₃O₁₂: Dy³⁺, Eu³⁺ with Ultrahigh Thermal Stability and Tunable Luminescence