Photoluminescence Properties of a Promising Red‐emitting Phosphor CaNb2O6:Eu3+ for Trichromatic White Light Emitting Diodes Application

Huang, Junlia; Zhou, Liya; He, Xipu; Gong, Fuzhong

doi:10.1002/cjoc.201190101

Cited by 14 publications

(8 citation statements)

References 30 publications

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“…The multi-phonon relaxation by NbO 4 3À was not able to bridge the gaps between the higher energy levels ( 5 D 1 , 5 D 2 and 5 D 3 ) and the 5 D 0 level of Eu 3+ completely, which resulted in emissions from these higher levels. [44][45][46][47] A simple model illustrating the energy transfer from the NbO 4 (O 2À -Nb 5+ charge transfer band) group to the Gd 3+ ion, concentration quenching of the Gd 3+ ion, and the energy transfer from the O 2À -Nb 5+ charge transfer band to Eu 3+ and Dy 3+ ions process in GdNbO 4 is shown in Fig. 9.…”

Section: Photoluminescence Propertiesmentioning

confidence: 99%

Hydrothermal approach and luminescent properties for the synthesis of orthoniobates GdNbO₄:Ln³⁺(Ln = Dy, Eu) single crystals under high-temperature high-pressure conditions

Yang

Zhao

et al. 2014

New J. Chem.

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Section: Photoluminescence Propertiesmentioning

confidence: 99%

Hydrothermal approach and luminescent properties for the synthesis of orthoniobates GdNbO₄:Ln³⁺(Ln = Dy, Eu) single crystals under high-temperature high-pressure conditions

Yang

Zhao

et al. 2014

New J. Chem.

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“…CaNb 2 O 6 , a subcomponent of the complex perovskite family A(B′ 1/3 B″ 2/3 )O 3 , crystallizing with orthorhombic columbite structure in the space group of Pbcn (60), has been investigated as a blue luminescence material, a good dielectric material for microwave dielectric applications, a catalyst for photocatalytic splitting of water, a strong source of coherent light which can be useful in applications of holography, as well as laser host material. − In 2007, Boutinaud et al have investigated the dependence of PL properties of Tb 3+ -doped CaNb 2 O 6 on temperature . In 2011, Huang et al have shown the PL of CaNb 2 O 6 :Eu 3+ under 393 nm excitation . Recently, Wang et al.…”

Section: Introductionmentioning

confidence: 99%

Host-Sensitized Luminescence Properties in CaNb₂O₆:Ln³⁺ (Ln³⁺ = Eu³⁺/Tb³⁺/Dy³⁺/Sm³⁺) Phosphors with Abundant Colors

et al. 2014

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A series of Ln(3+) (Ln(3+) = Eu(3+)/Tb(3+)/Dy(3+)/Sm(3+)) ion doped CaNb2O6 (CNO) phosphors have been prepared via the conventional high-temperature solid-state reaction route. The X-ray diffraction (XRD) and structure refinement, diffuse reflection, photoluminescence (PL), and fluorescent decay curves were used to characterize the as-prepared samples. Under UV radiation, the CNO host present a broad emission band from about 355 to 605 nm centered around 460 nm originating from the NbO6 octahedral groups, which has spectral overlaps with the excitation of f-f transitions of Eu(3+)/Tb(3+)/Dy(3+)/Sm(3+) in CNO:Eu(3+)/Tb(3+)/Dy(3+)/Sm(3+) samples. They show both host emission and respective emission lines derived from the characteristic f-f transitions of activators, which present different emission colors owing to the energy transfer from the NbO6 group in the host to Eu(3+)/Tb(3+)/Dy(3+)/Sm(3+) with increasing activator concentrations. The decreases of decay lifetimes of host emissions in CNO:Eu(3+)/Tb(3+)/Dy(3+)/Sm(3+) demonstrate the energy transfer from the hosts to Eu(3+)/Tb(3+)/Dy(3+)/Sm(3+). The energy transfer mechanisms in CNO:Eu(3+)/Tb(3+)/Dy(3+) phosphors have been determined to be a resonant type via dipole-dipole mechanisms. For CNO:Sm(3+), the metal-metal charge transfer transition (MMCT) might contribute to the different variations of decay lifetimes and emission intensity from CNO:Eu(3+)/Tb(3+)/Dy(3+) samples. The best quantum efficiency is 71.2% for CNO:0.01/0.02Dy(3+). The PL properties of as-prepared materials indicate the promising application in UV-pumped white-emitting lighting diodes field.

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“…However, there is an obvious impurity peak of CYN:0.1Eu 3+ material locating at around 29.3°, which can be assigned to the CaNb 2 O 6 host (No. 71-2406); according to the previous literature, − the most important thing is that the Eu 3+ -activated CaNb 2 O 6 phosphors have been promising for SSL as an efficient red-emitting phosphor, in spite of only presenting a weak phase in this work. The double-perovskite Ca 2 GdNbO 6 is determined to have a monoclinic structure with the P 2 1 / c space group, as shown in Figure S2a (SI) .…”

Section: Resultsmentioning

confidence: 98%

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca₂BB′O₆ (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

Hua

2021

ACS Sustainable Chem. Eng.

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At present, rare-earth-activated perovskite-type materials have attracted lots of interest from researchers owing to their excellent advantages of unique electron properties and stable structure. This present work was designed to synthesize, investigate, and compare the photoluminescence properties in europium(III) (Eu 3+ )-activated Ca 2 BB′O 6 (B = Y, Gd, and La; B′ = Sb and Nb) double-perovskite (A 2 BB′O 6 ) luminescent materials. The doped Eu 3+ ions substitute the B sites of Y 3+ , Gd 3+ , and La 3+ ions, which are distributed to the equilibrium valence state and exhibit little difference in ion radius among them. All the resultant samples have a monoclinic structure, and the B sites strongly affect the space group in double-perovskite Ca 2 BB′O 6 frameworks. Additionally, the emission intensity, thermal stability, decay curve, color purity, quantum yield (QY), etc. were determined. The Ca 2 BNbO 6 :Eu 3+ (B = Y, Gd, and La) frameworks have good QYs (>42%), which are promising for white-light-emitting diodes (WLEDs). Besides, the red-emitting Ca 2 BB′O 6 :Eu 3+ − polydimethylsiloxane (PDMS) and white-emitting CYN0.1Eu 3+ −commercial phosphors (CP)−PDMS films were fabricated. Eventually, the packaged WLEDs based on the Ca 2 BNbO 6 :Eu 3+ (B = Y, Gd, and La) powders and a novel white-emitting structure based on the CYN:0.1Eu 3+ −CP−PDMS film were confirmed to have suitable color rendering index and correlated color temperature values for indoor illumination.

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Photoluminescence Properties of a Promising Red‐emitting Phosphor CaNb₂O₆:Eu³⁺ for Trichromatic White Light Emitting Diodes Application

Abstract: Motivated by the need for new phosphors of white light emitting diode (WLED) application, Ca 0.95 Nb 2 O 6 : 3 0.05

Cited by 14 publications

References 30 publications

Hydrothermal approach and luminescent properties for the synthesis of orthoniobates GdNbO₄:Ln³⁺(Ln = Dy, Eu) single crystals under high-temperature high-pressure conditions

Hydrothermal approach and luminescent properties for the synthesis of orthoniobates GdNbO₄:Ln³⁺(Ln = Dy, Eu) single crystals under high-temperature high-pressure conditions

Host-Sensitized Luminescence Properties in CaNb₂O₆:Ln³⁺ (Ln³⁺ = Eu³⁺/Tb³⁺/Dy³⁺/Sm³⁺) Phosphors with Abundant Colors

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca₂BB′O₆ (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

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Photoluminescence Properties of a Promising Red‐emitting Phosphor CaNb2O6:Eu3+ for Trichromatic White Light Emitting Diodes Application

Abstract: Motivated by the need for new phosphors of white light emitting diode (WLED) application, Ca 0.95 Nb 2 O 6 : 3 0.05

Cited by 14 publications

References 30 publications

Hydrothermal approach and luminescent properties for the synthesis of orthoniobates GdNbO4:Ln3+(Ln = Dy, Eu) single crystals under high-temperature high-pressure conditions

Hydrothermal approach and luminescent properties for the synthesis of orthoniobates GdNbO4:Ln3+(Ln = Dy, Eu) single crystals under high-temperature high-pressure conditions

Host-Sensitized Luminescence Properties in CaNb2O6:Ln3+ (Ln3+ = Eu3+/Tb3+/Dy3+/Sm3+) Phosphors with Abundant Colors

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca2BB′O6 (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

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Photoluminescence Properties of a Promising Red‐emitting Phosphor CaNb₂O₆:Eu³⁺ for Trichromatic White Light Emitting Diodes Application

Hydrothermal approach and luminescent properties for the synthesis of orthoniobates GdNbO₄:Ln³⁺(Ln = Dy, Eu) single crystals under high-temperature high-pressure conditions

Hydrothermal approach and luminescent properties for the synthesis of orthoniobates GdNbO₄:Ln³⁺(Ln = Dy, Eu) single crystals under high-temperature high-pressure conditions

Host-Sensitized Luminescence Properties in CaNb₂O₆:Ln³⁺ (Ln³⁺ = Eu³⁺/Tb³⁺/Dy³⁺/Sm³⁺) Phosphors with Abundant Colors

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca₂BB′O₆ (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes