Mechanism of the prolongation of the green afterglow of SrAl2O4:Dy3+ caused by the use of H3BO3 flux

Zhai, Bao-gai; Yang, Long; Ma, Qing-Lan; Liu, Xianyun; Huang, Yuan Ming

doi:10.1016/j.jlumin.2016.09.010

Cited by 43 publications

(39 citation statements)

References 34 publications

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“…Color coordinates are important parameters to quantitatively describe the emission color for luminescent materials, and the CIE chromaticity coordinates can be calculated from the PL spectral data of luminescent materials [17][18][19][20]. the Eu 3+ doped ZMO at 600 ∘ C for 2 h. As can be seen in Figure 7, the X-ray emission peaks are located at 0.53, 1.02, 2.30, 8.61, and 9.57 keV, corresponding to the characteristic X-ray emissions of O(…”

Section: Eumentioning

confidence: 99%

Effects of Sintering Temperature on the Morphology and Photoluminescence of Eu³⁺ Doped Zinc Molybdenum Oxide Hydrate

Zhai

Yang

et al. 2018

Journal of Nanomaterials

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Synthesis of shape controlled and rare-earth doped ZnMoO 4 nanostructures on a large scale with low costs is a present challenge in nanotechnology. The precursor of Eu 3+ doped zinc molybdenum oxide hydrate (Zn 5 Mo 2 O 11 ⋅5H 2 O) was synthesized at room temperature via the coprecipitation method. The influences of the sintering temperature on the microstructures and photoluminescence (PL) of the precursor were investigated by means of X-ray diffraction, scanning electron microscopy, thermal gravimetry, differential scanning calorimetry, energy dispersive X-ray spectroscopy, diffuse reflectance spectroscopy, and PL spectrophotometry. It is found that Eu 3+ doped ZnMoO 4 nanostructures can be derived by sintering the precursor at a relatively low temperature of about 400 ∘ C. Our results have demonstrated that Eu 3+ doped ZnMoO 4 nanostructures can be cost-effectively derived by sintering the precursor at a relatively low temperature.

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Section: Eumentioning

confidence: 99%

Effects of Sintering Temperature on the Morphology and Photoluminescence of Eu³⁺ Doped Zinc Molybdenum Oxide Hydrate

Zhai

Yang

et al. 2018

Journal of Nanomaterials

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“…The first four X-ray emission peaks in the left section of Figure 2b are located at 0.53 keV, 1.02 keV, 1.78 keV, and 2.13 keV, which can be attributed to the characteristic X-ray emissions of O(Kα 1 ), Zn(Lα 1,2 ), W(Mα 1 ), and Au(Mα 1 ), respectively. The Au element was introduced in the specimen during the Au sputtering for the convenience of SEM analysis [47,48]. In the middle section of Figure 2b, there are four peaks located at 5.85 keV, 6.46 keV, 6.85 keV, and 7.48 keV, which can be assigned to the characteristic emissions of Eu(Lα 1,2 ), Eu(Lβ 1 ), Eu(Lβ 2,15 ), and Eu(Lγ 1 ), respectively [41,43].…”

Section: Resultsmentioning

confidence: 99%

“…Density functional calculations can be reliably applied to electronic structure calculations for a variety of materials [39,47,48,59]. In the framework of GGA + U, we performed electronic structure calculations for perfect ZnWO 4 and defect-containing ZnWO 4 by defining U 5d = 8 eV for W. Figure 6 presents the calculated band structures and density of states of perfect ZnWO 4 .…”

Section: Resultsmentioning

confidence: 99%

Eu2+ and Eu3+ Doubly Doped ZnWO4 Nanoplates with Superior Photocatalytic Performance for Dye Degradation

Huang

Yang

et al. 2018

Nanomaterials

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Eu2+ and Eu3+ doubly doped ZnWO4 nanoplates with highly exposed {100} facets were synthesized via a facile hydrothermal route in the presence of surfactant cetyltrimethyl ammonium bromide. These ZnWO4 nanoplates were characterized using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectrometry, diffuse UV-vis reflectance spectroscopy, photoluminescence spectrophotometry, and photoluminescence lifetime spectroscopy to determine their morphological, structural, chemical, and optical characteristics. It is found that Eu-doped ZnWO4 nanoplates exhibit superior photo-oxidative capability to completely mineralize the methyl orange into CO2 and H2O, whereas undoped ZnWO4 nanoparticles can only cleave the organic molecules into fragments. The superior photocatalytic performance of Eu-doped ZnWO4 nanoplates can be attributed to the cooperative effects of crystal facet engineering and defect engineering. This is a valuable report on crystal facet engineering in combination with defect engineering for the development of highly efficient photocatalysts.

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“…It is well‐known that the PL properties are very impressible to flux. Some fluxes such as boric acid has been introduced into the crystal structure of many phosphors and the results show that it can improve the emission performance remarkably because of the smoothed particle morphology and the enhanced crystallinity of prepared phosphors . However, doping H 3 BO 3 into Ca 3 Al 4 ZnO 10 :4%Ti 4+ phosphor may alter the lifetimes .…”

Section: Resultsmentioning

confidence: 99%

Exploration of bluish violet‐emitting phosphor Ca₃Al₄ZnO₁₀:Ti⁴⁺ with enhanced emission by Ca²⁺ vacancies

Zhou

et al. 2018

J Am Ceram Soc

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In this paper, we introduced a bluish violet‐emitting phosphor Ca3Al4ZnO10:Ti (IV) (CAZO:Ti4+) synthesized by high‐temperature solid‐state reaction. Upon 265 nm excitation, a broad emission band spanned from 300 nm to 500 nm and centered at 370 nm was observed. In addition, the effects of flux and charge compensation to photoluminescence properties of CAZO:Ti4+ were systematically investigated. The results show that 103% improvement of emission intensity was achieved when 1% H3BO3 flux was introduced and 32.8% enhancement of it for 2% Ca2+ vacancies doped as charge compensator. Moreover, the lifetimes, band gap energy, concentration quenching mechanism, as well as electron transition process of CAZO:Ti4+ were discussed. Due to the efficient broad bluish violet emission, this phosphor may find a potential application in mercury vapor‐excited fluorescent lamp for plant growth.

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Mechanism of the prolongation of the green afterglow of SrAl2O4:Dy3+ caused by the use of H3BO3 flux

Cited by 43 publications

References 34 publications

Effects of Sintering Temperature on the Morphology and Photoluminescence of Eu³⁺ Doped Zinc Molybdenum Oxide Hydrate

Effects of Sintering Temperature on the Morphology and Photoluminescence of Eu³⁺ Doped Zinc Molybdenum Oxide Hydrate

Eu2+ and Eu3+ Doubly Doped ZnWO4 Nanoplates with Superior Photocatalytic Performance for Dye Degradation

Exploration of bluish violet‐emitting phosphor Ca₃Al₄ZnO₁₀:Ti⁴⁺ with enhanced emission by Ca²⁺ vacancies

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Mechanism of the prolongation of the green afterglow of SrAl2O4:Dy3+ caused by the use of H3BO3 flux

Cited by 43 publications

References 34 publications

Effects of Sintering Temperature on the Morphology and Photoluminescence of Eu3+ Doped Zinc Molybdenum Oxide Hydrate

Effects of Sintering Temperature on the Morphology and Photoluminescence of Eu3+ Doped Zinc Molybdenum Oxide Hydrate

Eu2+ and Eu3+ Doubly Doped ZnWO4 Nanoplates with Superior Photocatalytic Performance for Dye Degradation

Exploration of bluish violet‐emitting phosphor Ca3Al4ZnO10:Ti4+ with enhanced emission by Ca2+ vacancies

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Product

Resources

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Effects of Sintering Temperature on the Morphology and Photoluminescence of Eu³⁺ Doped Zinc Molybdenum Oxide Hydrate

Effects of Sintering Temperature on the Morphology and Photoluminescence of Eu³⁺ Doped Zinc Molybdenum Oxide Hydrate

Exploration of bluish violet‐emitting phosphor Ca₃Al₄ZnO₁₀:Ti⁴⁺ with enhanced emission by Ca²⁺ vacancies