Photoluminescence, energy transfer, and thermal stability of BaAl2Si2O8:Bi3+, Tb3+ phosphors for w-LEDs

Ma, P.; Song, Yanhua; Yuan, Bo; Ye, Sheng; Xu, Chengyi; Zou, Haifeng; Zheng, Keyan

doi:10.1016/j.ceramint.2016.08.161

Cited by 40 publications

(9 citation statements)

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“…This reduction could be due to the introduction of intermediate energy states as well as due to the creation of point defects such as oxygen vacancies in this system. Th 0.50 Bi 0.50 O 2‐δ showed a broad emission starting from 380 to 600 nm in the photoluminescence spectrum, of which peak centered at 436 nm could be ascribed to 1 P 1 ‐ 1 S 0 transition of Bi 3+ ion (Figure ) . This observation also supported our claim of +3 oxidation state of bismuth in these samples.…”

Section: Resultssupporting

confidence: 84%

Efficient Use of a Polyamine Carboxylate Ligand to Probe the Extent of Incorporation of Stereochemically Active Bi³⁺ in ThO₂

et al. 2018

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Realizing the advantages of atomic level mixing, high homogeneity precise stoichiometric control and low processing temperatures, co‐precipitation route employing the polyamine carboxylate, ethylenediamine tetra acetic acid (EDTA) has been followed to determine the extent of dissolution of bismuth in ThO2 adopting fluorite structure. While the precursors containing varying amounts of Th4+ and Bi3+ were X‐ray amorphous, calcining them at 800 °C for 6 h yielded crystalline oxides with fluorite structure till Th0.40Bi0.60O2‐δ. This was supported by Raman spectral measurements in which defect band due to oxygen vacancies was present at around 590 cm−1 in addition to the band due to fluorite at around 460 cm−1. An increasing trend of cubic lattice constant with progressive substitution of bismuth in ThO2 was observed. The direct band gap was found to decrease with increase in bismuth content and was lying in the range of 2.54‐3.62 eV. Porous morphology of the samples was evident in their scanning electron microscopic images and they were macro porous as determined from surface area analysis measurements. Th0.50Bi0.50O2‐δ was found to efficiently catalyze the reduction of some nitroaromatics for nearly six cycles.

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Section: Resultssupporting

confidence: 84%

Efficient Use of a Polyamine Carboxylate Ligand to Probe the Extent of Incorporation of Stereochemically Active Bi³⁺ in ThO₂

et al. 2018

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“…Dy 3+ firstly increased and then decreased due to the concentration quenching phenomena. This can also demonstrate the existence of energy transfer process from Tm 3+ to Dy 3+ …”

Section: Luminescence Propertiesmentioning

confidence: 61%

Spherical Microstructures of Lu₂O₃:Ln³⁺ (Ln=Tm, Dy, Tb, Eu): Rapid Microwave‐Assisted Synthesis, Energy Transfer, and Multicolor Emission

et al. 2017

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microspheres have been synthesized via a rapid microwave route followed by annealing process. Diverse morphologies of samples can be easily realized by changing the volume ratio of H 2 O/EtOH. The samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), thermogravimetry analysis (TGA). Under the excitation of UV light, Lu 2 O 3 :Ln 3 + exhibited the characteristic transitions of Ln 3 + , and green (Tb 3 + ), blue (Tm 3 + ), red (Eu 3 + ), yellow (Dy 3 + ) light can be obtained. Under 360 nm irradiation ( 1 D 2 -3 F 4 transition of Tm 3 + ), both characteristic transitions of Tm 3 + and Dy 3 + can be observed in Lu 2 O 3 :1%Tm 3 + ,x%Dy 3 + samples. Furthermore, the critical distance between Tm 3 + and Dy 3 + was calculated, and the energy transfer process from Tm 3 + to Dy 3 + was dipole-dipole interaction. This synthetic method may be useful for preparing other inorganic materials with multi-color emitting.

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“…3(d) depicts the luminescence decay curves of the Mn 4+ ions in the LLS:xMn 4+ (x ¼ 0.1-1.5%) phosphors (l ex ¼ 338 nm; l em ¼ 712 nm). The decay curves of as-prepared samples could be well tted by the following double exponential expression: [54][55][56]…”

Section: Resultsmentioning

confidence: 99%

Thermally stable La₂LiSbO₆:Mn⁴⁺,Mg²⁺far-red emitting phosphors with over 90% internal quantum efficiency for plant growth LEDs

et al. 2018

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Photoluminescence, energy transfer, and thermal stability of BaAl2Si2O8:Bi3+, Tb3+ phosphors for w-LEDs

Cited by 40 publications

References 44 publications

Efficient Use of a Polyamine Carboxylate Ligand to Probe the Extent of Incorporation of Stereochemically Active Bi³⁺ in ThO₂

Efficient Use of a Polyamine Carboxylate Ligand to Probe the Extent of Incorporation of Stereochemically Active Bi³⁺ in ThO₂

Spherical Microstructures of Lu₂O₃:Ln³⁺ (Ln=Tm, Dy, Tb, Eu): Rapid Microwave‐Assisted Synthesis, Energy Transfer, and Multicolor Emission

Thermally stable La₂LiSbO₆:Mn⁴⁺,Mg²⁺far-red emitting phosphors with over 90% internal quantum efficiency for plant growth LEDs

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Photoluminescence, energy transfer, and thermal stability of BaAl2Si2O8:Bi3+, Tb3+ phosphors for w-LEDs

Cited by 40 publications

References 44 publications

Efficient Use of a Polyamine Carboxylate Ligand to Probe the Extent of Incorporation of Stereochemically Active Bi3+ in ThO2

Efficient Use of a Polyamine Carboxylate Ligand to Probe the Extent of Incorporation of Stereochemically Active Bi3+ in ThO2

Spherical Microstructures of Lu2O3:Ln3+ (Ln=Tm, Dy, Tb, Eu): Rapid Microwave‐Assisted Synthesis, Energy Transfer, and Multicolor Emission

Thermally stable La2LiSbO6:Mn4+,Mg2+far-red emitting phosphors with over 90% internal quantum efficiency for plant growth LEDs

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Efficient Use of a Polyamine Carboxylate Ligand to Probe the Extent of Incorporation of Stereochemically Active Bi³⁺ in ThO₂

Efficient Use of a Polyamine Carboxylate Ligand to Probe the Extent of Incorporation of Stereochemically Active Bi³⁺ in ThO₂

Spherical Microstructures of Lu₂O₃:Ln³⁺ (Ln=Tm, Dy, Tb, Eu): Rapid Microwave‐Assisted Synthesis, Energy Transfer, and Multicolor Emission

Thermally stable La₂LiSbO₆:Mn⁴⁺,Mg²⁺far-red emitting phosphors with over 90% internal quantum efficiency for plant growth LEDs