Novel multicolor-tunable phosphor Ba3B6Si2O16: Tb3+, Eu3+ - Luminescent properties and energy transfer for near-UV white LEDs

Zhao, Wenyu; Wen, Huixia; Fan, Bin; Li, Hong‐Xi

doi:10.1016/j.jssc.2020.121403

Cited by 10 publications

(1 citation statement)

References 19 publications

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“…A triplet state (electrons have parallel spins) is lower in energy than the corresponding singlet state (electrons have paired spins). Furthermore, spin-forbidden and symmetry-forbidden selection rules have to be considered [78].…”

Section: Uv-vismentioning

confidence: 99%

Nanomaterials Based on Collaboration with Multiple Partners: Zn3Nb2O8 Doped with Eu3+ and/or Amino Substituted Porphyrin Incorporated in Silica Matrices for the Discoloration of Methyl Red

Bîrdeanu

Fratilescu

Epuran

et al. 2023

IJMS

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Designing appropriate materials destined for the removal of dyes from waste waters represents a great challenge for achieving a sustainable society. Three partnerships were set up to obtain novel adsorbents with tailored optoelectronic properties using silica matrices, Zn3Nb2O8 oxide doped with Eu3+, and a symmetrical amino-substituted porphyrin. The pseudo-binary oxide with the formula Zn3Nb2O8 was obtained by the solid-state method. The doping of Zn3Nb2O8 with Eu3+ ions was intended in order to amplify the optical properties of the mixed oxide that are highly influenced by the coordination environment of Eu3+ ions, as confirmed by density functional theory (DFT) calculations. The first proposed silica material, based solely on tetraethyl orthosilicate (TEOS) with high specific surface areas of 518–726 m2/g, offered better performance as an adsorbent than the second one, which also contained 3-aminopropyltrimethoxysilane (APTMOS). The contribution of amino-substituted porphyrin incorporated into silica matrices resides both in providing anchoring groups for the methyl red dye and in increasing the optical properties of the whole nanomaterial. Two different types of methyl red adsorption mechanisms can be reported: one based on surface absorbance and one based on the dye entering the pores of the adsorbents due to their open groove shape network.

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Section: Uv-vismentioning

confidence: 99%

Nanomaterials Based on Collaboration with Multiple Partners: Zn3Nb2O8 Doped with Eu3+ and/or Amino Substituted Porphyrin Incorporated in Silica Matrices for the Discoloration of Methyl Red

Bîrdeanu

Fratilescu

Epuran

et al. 2023

IJMS

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A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs

et al. 2022

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Due to the advantages of good physicochemical properties, thermal stability, and optical properties, double perovskite compounds have received extensive attention. On this basis, a new type of red phosphor, Ca2YNbO6:xEu3+, was synthesized using a high‐temperature solid‐phase method. Its phase purity, morphology, elemental composition, absorption spectrum, photoluminescence, thermal stability, and Commission Internationale de l'éclairage (CIE) chromaticity coordinates were thoroughly investigated. The results display that there is no impurity phase in the samples and the convergence factor Rwp = 14.2%; the microscopic particles are uniform and full, and the distribution of each element is uniform. The energy band gap ΔE is between 3.71 eV and 3.65 eV. The luminescence intensity is the best when the doped Eu3+ concentration x reaches 0.4, and emits 612 nm red light (5D0→7F2) under 465 nm excitation, and the concentration quenching is attributed to a d–d interaction. The luminescence intensity at 425 K was still 75% of the room temperature luminescence intensity, which indicates that the thermal stability is extremely superior. The CIE chromaticity coordinates (0.6534, 0.3455) of the Ca2YNbO6:0.4Eu3+ phosphors are very close to National Television Standards Committee (0.670, 0.330), and the samples have low correlated colour temperature (2656 K) and high colour purity (99.90%). All findings suggest that Ca2YNbO6:Eu3+ can serve as a substitute for red phosphor in WLEDs.

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Structural and photoluminescence properties of a novel Ba2GdNbO6: Sm3+ phosphor

Zhang

Cui

Zhang

et al. 2021

Optik

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Novel multicolor-tunable phosphor Ba3B6Si2O16: Tb3+, Eu3+ - Luminescent properties and energy transfer for near-UV white LEDs

Cited by 10 publications

References 19 publications

Nanomaterials Based on Collaboration with Multiple Partners: Zn3Nb2O8 Doped with Eu3+ and/or Amino Substituted Porphyrin Incorporated in Silica Matrices for the Discoloration of Methyl Red

Nanomaterials Based on Collaboration with Multiple Partners: Zn3Nb2O8 Doped with Eu3+ and/or Amino Substituted Porphyrin Incorporated in Silica Matrices for the Discoloration of Methyl Red

A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs

Structural and photoluminescence properties of a novel Ba2GdNbO6: Sm3+ phosphor

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Novel multicolor-tunable phosphor Ba3B6Si2O16: Tb3+, Eu3+ - Luminescent properties and energy transfer for near-UV white LEDs

Cited by 10 publications

References 19 publications

Nanomaterials Based on Collaboration with Multiple Partners: Zn3Nb2O8 Doped with Eu3+ and/or Amino Substituted Porphyrin Incorporated in Silica Matrices for the Discoloration of Methyl Red

Nanomaterials Based on Collaboration with Multiple Partners: Zn3Nb2O8 Doped with Eu3+ and/or Amino Substituted Porphyrin Incorporated in Silica Matrices for the Discoloration of Methyl Red

A novel red phosphor Ca2YNbO6:Eu3+ for WLEDs

Structural and photoluminescence properties of a novel Ba2GdNbO6: Sm3+ phosphor

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Product

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A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs