Characterization of the VUV excitation spectrum of BaZr(BO3)2:Eu

Lin, He; Wang, Yuhua; Gao, Hui

doi:10.1016/j.jlumin.2006.06.004

Cited by 18 publications

(6 citation statements)

References 28 publications

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“…Figure 1 shows the X-ray diffraction (XRD) spectra of BaZr(BO 3 ) 2 :Eu 3+ and BaZr(BO 3 ) 2 :Eu 3+ doped with 20 mol% of Si. The XRD spectra clearly imply that the two samples exhibit trigonal symmetry consistent with noncentrosymmetric space group R3c similar to a previous report [13]. The position of the (0011) diffraction peak shows a small shift of 0.04° between the doped and undoped samples (inset of Figure 1).…”

Section: Methodssupporting

confidence: 87%

Structural investigation and luminescent properties of BaZr(BO3)2:Eu3+ phosphors containing Si

Zhang

et al. 2010

Chin. Sci. Bull.

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Si 4+ -doped BaZr(BO 3 ) 2 :Eu 3+ phosphors are prepared by a conventional solid-state reaction. The influence of Si 4+ addition on the charge transfer state of Eu 3+ -O 2-and photoluminescence (PL) properties of BaZr(BO 3 ) 2 :Eu 3+ are discussed. Room temperature PL spectra indicated that efficient emission is obtained by Si doping. Increased values for the peak-peak ratio (PPR) of BaZr(BO 3 ) 2 :Eu 3+ at higher Si doping concentrations implied that the Eu 3+ ion is located in a more asymmetric environment in BaZr 0.8 Si 0.2 (BO 3 ) 2 :Eu 3+ than in the undoped samples. The Judd-Ofelt parameters Ω λ (λ=2,4) were calculated from the PL data, giving results that were consistent with those from the PPR. The maximum radiative quantum efficiency was achieved at a Si doping concentration of 20 mol%. BaZr(BO 3 ) 2 :Eu 3+ , charge transfer state, peak-peak ratio, Judd-Ofelt theory Citation: Zhang Z P, Li G M, Zhang X S, et al. Structural investigation and luminescent properties of BaZr(BO 3 ) 2 :Eu 3+ phosphors containing Si.In recent years, many researchers have focused on improving the luminescence properties of traditional materials [1-3] and preparing new luminescent phosphors with high performance [4,5]. Xing et al. [3] reported an enhancement of the luminescent intensity of Gd 2 O 2 S:Tb phosphors through the use of a new synthetic method. Luo et al.[5] reviewed the recent progress in alkaline earth silicate host luminescent materials with broad excitation bands for phosphor-converted white light emitting diodes. Borate-based systems have the advantages of low synthesis temperature, high UV transparency and good thermal stability. Eu 3+ is commonly adopted as an activator in commercial red phosphors [1,2]. There are two main radiative transitions that occur in the 4f levels of Eu 3+ . The emission centered at 591 nm is caused by a magnetic dipole transition of 5 D 0 -7 F 1 and

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Section: Methodssupporting

confidence: 87%

Structural investigation and luminescent properties of BaZr(BO3)2:Eu3+ phosphors containing Si

Zhang

et al. 2010

Chin. Sci. Bull.

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“…In the crystal structure of AZr 2 (PO 4 ) 3 , alternate layers of AO 6 distorted (or rotated) octahedron and ZrO 6 octahedron perpendicular to the c-axis, each ZrO 6 octahedron is connected to six PO 4 tetrahedra, while each tetrahedron is linked to four octahedra. Ling He and co-workers have explained this phenomenon which happened in BaZr(BO 3 ) 2 ;Eu 3+ [18]. They have drawn the conclusion that the weak O-Eu CT transition is associated with the covalent bonding to the strength of Zr-O bonds.…”

Section: Luminescence Of Azrmentioning

confidence: 97%

VUV spectroscopic properties of rare-earth (RE³⁺= Eu, Tb, Tm)-dopedAZr₂(PO₄)₃(A⁺= Li, Na, K) type phosphate

Zhang¹,

Chen²,

Yang³

et al. 2008

J. Phys. D: Appl. Phys.

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The excitation spectra of pure and rare-earth (RE3+ = Eu, Tb, Tm)-doped AZr2(PO4)3 (A+ = Li, Na, K) in the vacuum ultraviolet (VUV) regions are investigated. The results indicate that these samples show strong absorption in the VUV range. The band ranging from 130 to 160 nm is due to the absorption band of host lattice or PO4 groups; the band at 160–200 nm is related to the charge transfer (CT) transition of O–Zr. For Eu3+-doped samples, the weak band in the excitation spectra at about 208 nm is related to the CT band of O2−–Eu3+. As for Tb3+-doped samples, the strong band at 225 nm and the weak band at 261 nm in the excitation spectra are assumed to the spin-allowed and spin-forbidden f–d transitions (4f8→ 4f75 d1) of Tb3+. However, there is no obvious band of CT of O2−–Tm3+ in the Tm3+-doped samples.

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“…However, in the current study, the charge transfer (CT) absorption band is not effective, as there is an f→f transition of Eu 3+ due to weak interactions between Eu 3+ –O 2− and similar observations have been reported in various phosphors such as LiEu(PO 3 ) 4 and [ 19 ] BaZr(BO 3 ) 2 :Eu 3+ . [ 75 ]…”

Section: Resultsmentioning

confidence: 99%

“…in various phosphors such as LiEu(PO 3 ) 4 and [19] BaZr(BO 3 ) 2 :Eu 3+ . [75] The dominant peaks at 393 nm and 464 nm, arose as a result of 7 F 0 ! 5 L 6 and 7 F 0 !…”

Section: Morphology Of Phosphor Materialsmentioning

confidence: 99%

Structural and optical properties of a new Milarite type Na₃Mg₄LiSi₁₂O₃₀:Eu³⁺ phosphor

et al. 2022

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A new red-emitting Eu 3+ (1À17 mol%)-doped Na 3 Mg 4 LiSi 12 O 30 (NMLS) phosphor was prepared using a conventional solid-state reaction method at low temperature.The prepared samples belong to a hexagonal structure with a good match to JCPDS card no. 73-0934. The photoluminescence (PL) emission spectrum showed an intense peak at 612 nm when excited at 393 nm. The variation of electric dipole transition ( 5 D 0 -7 F 2 ) emission intensity with increasing Eu 3+ ion concentration was investigated. The concentration quenching at 11 mol% is due to the dipole-dipole interaction mechanism in the NMLS host. The optimized NMLS:Eu 3+ phosphor shows 2.18 times higher luminescence intensity than the (Y,Gd)BO 3 (YGB) commercial phosphor. The NMLS:Eu 3+ showed an intense red emission, having Commission Internationale de l'éclairage (CIE) coordinates (0.6280, 0.3691) and colour purity of 99.2%.The resulting phosphor exhibits good thermal stability of 80% at 423 K. The magnified images of fingerprint showed various minute features such as bridges, sweat pores, ridge end, bifurcation, island and core with better visualization under 393 nm excitation. Furthermore, the optimized NMLS:Eu 3+ was used for pc-LED, latent fingerprints, and anticounterfeit applications as a promising red phosphor.

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Characterization of the VUV excitation spectrum of BaZr(BO3)2:Eu

Cited by 18 publications

References 28 publications

Structural investigation and luminescent properties of BaZr(BO3)2:Eu3+ phosphors containing Si

Structural investigation and luminescent properties of BaZr(BO3)2:Eu3+ phosphors containing Si

VUV spectroscopic properties of rare-earth (RE³⁺= Eu, Tb, Tm)-dopedAZr₂(PO₄)₃(A⁺= Li, Na, K) type phosphate

Structural and optical properties of a new Milarite type Na₃Mg₄LiSi₁₂O₃₀:Eu³⁺ phosphor

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Characterization of the VUV excitation spectrum of BaZr(BO3)2:Eu

Cited by 18 publications

References 28 publications

Structural investigation and luminescent properties of BaZr(BO3)2:Eu3+ phosphors containing Si

Structural investigation and luminescent properties of BaZr(BO3)2:Eu3+ phosphors containing Si

VUV spectroscopic properties of rare-earth (RE3+= Eu, Tb, Tm)-dopedAZr2(PO4)3(A+= Li, Na, K) type phosphate

Structural and optical properties of a new Milarite type Na3Mg4LiSi12O30:Eu3+ phosphor

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Product

Resources

About

VUV spectroscopic properties of rare-earth (RE³⁺= Eu, Tb, Tm)-dopedAZr₂(PO₄)₃(A⁺= Li, Na, K) type phosphate

Structural and optical properties of a new Milarite type Na₃Mg₄LiSi₁₂O₃₀:Eu³⁺ phosphor