Predicting metal-to-metal charge transfer in closed-shell transition metal oxides doped with Bi3+ or Pb2+

Boutinaud, Philippe; Cavalli, Enrico

doi:10.1016/j.cplett.2011.01.036

Cited by 75 publications

(71 citation statements)

References 38 publications

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“…6 demonstrates the room temperature excitation (top; λem = 615 nm) and emission (bottom; λexc = 395 nm) spectra for Ca0.85-1.5xGdxEu0.10.05+0.5xWO4 (x = 0.1 -0.567). The excitation spectra consists of a broad band in the low wavelength region, which can be assigned to the charge-transfer state (250-310 nm) and Eu 3+ 4f 6 -4f 6 transitions between 300 and 400 nm [35]. nm.…”

Section: Luminescent Propertiesmentioning

confidence: 99%

Effect of cation vacancies on the crystal structure and luminescent properties of Ca 0.85−1.5x Gd x Eu 0.1 □ 0.05+0.5x WO 4 (0 ≤ x ≤ 0.567) scheelite-based red phosphors

Batuk

Морозов

et al. 2017

Journal of Alloys and Compounds

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The Ca0.85-1.5xGdxEu0.10.05+0.5xWO4 (0 ≤ x ≤ 0.567) series of cation-deficient scheelites is investigated to unveil the influence of the cation vacancies on the crystal structure and luminescent properties. The concentration of the vacancies is varied by the heterovalent substitution of Gd 3+ for Ca 2+ , keeping the concentration of the Eu 3+ luminescent centers constant in all compounds of the series. The crystal structure of the materials is studied using a combination of transmission electron microscopy and synchrotron X-ray powder diffraction. However, the difference in the local coordination environment of the A cation species noticeably affects the line width and the multiplet splitting of the 4f 6 -4f 6 transitions.

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Section: Luminescent Propertiesmentioning

confidence: 99%

Effect of cation vacancies on the crystal structure and luminescent properties of Ca 0.85−1.5x Gd x Eu 0.1 □ 0.05+0.5x WO 4 (0 ≤ x ≤ 0.567) scheelite-based red phosphors

Batuk

Морозов

et al. 2017

Journal of Alloys and Compounds

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“…3 H 4 transition of the Pr 3+ ions. The energy transfer between the Bi 3+ ions and other activators (including Pr 3+ ions as well) is well-known [25][26][27]. In our case it can be evidenced by Fig.…”

Section: Luminescencementioning

confidence: 61%

Spectroscopic properties of Bi2ZnOB2O6 single crystals doped with Pr3+ ions: Absorption and luminescence investigations

et al. 2015

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“…The used values of d corr and MMCT in NNOP/KNOP system are shown in Table (see Supporting Information). Therefore, the Equation can be written as follows:

MMCT false(Pr, c m^{- 1} false) = 78876 - \frac{164613}{d_{corr}}

…”

Section: Resultsmentioning

confidence: 99%

Tunable trap depth for persistent luminescence by cationic substitution in Pr³⁺:K_1−xNa_xNbO₃ perovskites

Castaing

Rytz

et al. 2018

J Am Ceram Soc

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The development of efficient red-emitting persistent phosphor is still an ongoing challenge. In the search of persistent materials in red range, Pr 3+ is a good candidate owing to its transitions between 1 D 2 and 3 H 4 state at about 612 nm. In this paper, we investigated the red persistent properties of Pr 3+ -doped perovskite oxide ABO 3 , (A: K, Na and B: Nb), which can be elaborated as large single crystal.KNbO 3 :Pr 3+ appears to have weak photoluminescence and no persistent luminescence. However, the cationic substituted compounds K 1−x Na x NbO 3 :Pr 3+ (x = 0, 0.4, 0.5, 0.7 0.9, 1) exhibit intense persistent luminescence, which increases steadily with increase in Na content. We correlated persistence behavior with the position of Metal-to-Metal Charge Transfer (MMCT) band, which plays crucial role in tuning of the trap depth. The MMCT band position decreases with the addition of Na contents and the thermoluminescence peak shifts toward higher temperature indicating the formation of deeper traps. This is in good agreement with the enhancement of the persistent luminescence suggesting that a proper tailoring of MMCT is needed to design efficient Pr 3+ -persistent phosphors with better performance. A detailed analysis on the trap depth, bandgap energy, and persistent luminescence properties is reported tuning the composition in the K 1−x Na x NbO 3 :Pr powder. K E Y W O R D SK 1−x Na x NbO 3 , perovskites, persistent luminescence, Pr 3+ , Tunable trap depth Liyi Li and Victor Castaing are equally contributed to this work.

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Predicting metal-to-metal charge transfer in closed-shell transition metal oxides doped with Bi3+ or Pb2+

Cited by 75 publications

References 38 publications

Effect of cation vacancies on the crystal structure and luminescent properties of Ca 0.85−1.5x Gd x Eu 0.1 □ 0.05+0.5x WO 4 (0 ≤ x ≤ 0.567) scheelite-based red phosphors

Effect of cation vacancies on the crystal structure and luminescent properties of Ca 0.85−1.5x Gd x Eu 0.1 □ 0.05+0.5x WO 4 (0 ≤ x ≤ 0.567) scheelite-based red phosphors

Spectroscopic properties of Bi2ZnOB2O6 single crystals doped with Pr3+ ions: Absorption and luminescence investigations

Tunable trap depth for persistent luminescence by cationic substitution in Pr³⁺:K_1−xNa_xNbO₃ perovskites

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Predicting metal-to-metal charge transfer in closed-shell transition metal oxides doped with Bi3+ or Pb2+

Cited by 75 publications

References 38 publications

Effect of cation vacancies on the crystal structure and luminescent properties of Ca 0.85−1.5x Gd x Eu 0.1 □ 0.05+0.5x WO 4 (0 ≤ x ≤ 0.567) scheelite-based red phosphors

Effect of cation vacancies on the crystal structure and luminescent properties of Ca 0.85−1.5x Gd x Eu 0.1 □ 0.05+0.5x WO 4 (0 ≤ x ≤ 0.567) scheelite-based red phosphors

Spectroscopic properties of Bi2ZnOB2O6 single crystals doped with Pr3+ ions: Absorption and luminescence investigations

Tunable trap depth for persistent luminescence by cationic substitution in Pr3+:K1−xNaxNbO3 perovskites

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Tunable trap depth for persistent luminescence by cationic substitution in Pr³⁺:K_1−xNa_xNbO₃ perovskites