The luminescence of Zr–Eu–O–N materials

Gutzov, S.; Kohls, Marco; Lerch, Martin

doi:10.1016/s0022-3697(99)00406-0

Cited by 18 publications

(4 citation statements)

References 21 publications

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“…In any case, such non-radiative relaxation is confirmed by the fast decay time observed on the decay curve. These calculated values reported here are longer than those reported for zirconia ceramic powder, 1.45 ms and 0.6 ms, for tetragonal and monoclinic, respectively [29]. Furthermore, they are longer than the values reported for submicrometre tetragonal powders prepared by spray pyrolysis (1.0-1.7 ms) [30].…”

Section: Luminescence Properties 321 Luminescence Of Eu 3+contrasting

confidence: 57%

Brilliant blue, green and orange–red emission band on Tm³⁺-, Tb³⁺- and Eu³⁺-doped ZrO₂ nanocrystals

Romero¹,

Rosa²,

López–Luke³

et al. 2010

J. Phys. D: Appl. Phys.

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Tm3+-, Tb3+- and Eu3+-doped ZrO2 nanocrystals were prepared by a facile precipitation method with a hydrothermal process. Structural characterization showed a crystallite size ranging from 30 to 40 nm, and monoclinic and tetragonal zirconia phases were observed depending on the dopant concentration. The monoclinic phase was dominant for 0.5 mol% of Tb3+ and Eu3+, and the tetragonal phase was 100% stabilized for 2 mol% of Tm3+ and Tb3+. The structure of emission bands associated with Eu3+ confirms the substitution of Zr4+ located at C1 and D2h symmetry sites for the monoclinic and tetragonal phases. The emission of three primary colours, red, green and blue, was obtained from Eu3+, Tb3+ and Tm3+, respectively, which makes this nanophosphor an excellent candidate for use in photonics applications. The emitted signal was analysed as a function of ion concentration and the optimum concentration was determined.

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Section: Luminescence Properties 321 Luminescence Of Eu 3+contrasting

confidence: 57%

Brilliant blue, green and orange–red emission band on Tm³⁺-, Tb³⁺- and Eu³⁺-doped ZrO₂ nanocrystals

Romero¹,

Rosa²,

López–Luke³

et al. 2010

J. Phys. D: Appl. Phys.

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“…The s m values obtained for the silica composites appear also to be much longer (2.66-1.96 ms) than those reported for Eu 3+ -doped m-ZrO 2 (0.6 ms) and Eu 3+ -doped t-nitridated ZrO 2 ceramic powders (1.45 ms) [11], for 10 mol% Eu 3+ -doped t-ZrO 2 submicrometer powders prepared by a spray pyrolysis process (1.0-1.7 ms) [12] and 1.5 mol% Eu 3+ -doped Y-stabilized ZrO 2 (1.5 ms) [13] micrometer powders prepared by a sonochemical method, even if they are still lower than those found by us for 1 mol% Eu 3+ -doped t-ZrO 2 (about 5 ms) and m-ZrO 2 (about 5 ms) [14].…”

Section: Resultsmentioning

confidence: 47%

Reduction of concentration-induced luminescence quenching in Eu3+-doped nanoparticles embedded in silica

et al. 2006

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“…2 Recently, luminescent materials containing RE ions coordinated by nitrogen rather than fluorine, chlorine, bromine, and oxygen have been reported; the examples are Ce 3ϩ -doped Y-Si-O-N compounds, 3 Eu 3ϩ -doped LaSi 3 N 5 , 4 Eu 2ϩ -doped Ba 2 Si 5 N 8 , 5 Zr-Eu/Ce-O-N ceramics. 6,7 These nitride ceramics or compounds have good thermal and chemical stabilities and, thus, are expected to be new host lattices for phosphors.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Luminescence Spectra of Calcium‐ and Rare‐Earth (R = Eu, Tb, and Pr)‐Codoped α‐SiAlON Ceramics

Xie

Mitomo

Uheda

et al. 2002

Journal of the American Ceramic Society

338

232

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Rare-earth-doped oxynitride or nitride compounds have been reported to be luminescent and may then serve as new phosphors with good thermal and chemical stabilities. In this work, we report the photoluminescence (PL) spectra of europium-, terbium-, and praseodymium-doped Ca-␣-SiAlON ceramics. The highly dense ceramics were prepared by hot pressing at 1750°C for 1 h under 20 MPa in a nitrogen atmosphere. Europium-doped Ca-␣-SiAlON displayed a single broad emission band peaking at ‫؍‬ 550 -590 nm depending on the europium concentration. The emission bands in the spectra of europium-doped Ca-␣-SiAlONs were assigned to the allowed transition of Eu 2؉ from the lowest crystal field component of 4f 6 5d to 8 S 7/2 (4f 7 ) ground-state level. The emission spectra of terbium-and praseodymium-doped Ca-␣-SiAlON ceramics both consisted of several sharp lines, which were attributed to the 5 D 4 3 7 F j (j ‫؍‬ 3, 4, 5, 6) transitions of Tb 3؉ and 3 P 0 3 3 H j (j ‫؍‬ 3, 4, 5) transitions of Pr 3؉ , respectively. In particular, the terbium-doped ␣-SiAlON ceramics showed a strong green emission among these phosphors.

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The luminescence of Zr–Eu–O–N materials

Cited by 18 publications

References 21 publications

Brilliant blue, green and orange–red emission band on Tm³⁺-, Tb³⁺- and Eu³⁺-doped ZrO₂ nanocrystals

Brilliant blue, green and orange–red emission band on Tm³⁺-, Tb³⁺- and Eu³⁺-doped ZrO₂ nanocrystals

Reduction of concentration-induced luminescence quenching in Eu3+-doped nanoparticles embedded in silica

Preparation and Luminescence Spectra of Calcium‐ and Rare‐Earth (R = Eu, Tb, and Pr)‐Codoped α‐SiAlON Ceramics

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The luminescence of Zr–Eu–O–N materials

Cited by 18 publications

References 21 publications

Brilliant blue, green and orange–red emission band on Tm3+-, Tb3+- and Eu3+-doped ZrO2 nanocrystals

Brilliant blue, green and orange–red emission band on Tm3+-, Tb3+- and Eu3+-doped ZrO2 nanocrystals

Reduction of concentration-induced luminescence quenching in Eu3+-doped nanoparticles embedded in silica

Preparation and Luminescence Spectra of Calcium‐ and Rare‐Earth (R = Eu, Tb, and Pr)‐Codoped α‐SiAlON Ceramics

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Brilliant blue, green and orange–red emission band on Tm³⁺-, Tb³⁺- and Eu³⁺-doped ZrO₂ nanocrystals

Brilliant blue, green and orange–red emission band on Tm³⁺-, Tb³⁺- and Eu³⁺-doped ZrO₂ nanocrystals