Y 2 O 3 :Eu phosphor particles prepared by spray pyrolysis from a solution containing citric acid and polyethylene glycol

Roh, Hyun Sook; Park, HD; Park, SeungBin

doi:10.1007/s003390201427

Cited by 20 publications

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“…This viscous gel promoted the volume precipitation of precursors within the droplets and resulted in the formation of powders spherical in shape and with a dense morphology. 12 Fig. 4 shows the TG/DSC curves of the powders prepared by the FEAG process obtained from the spray solutions with low and high concentrations of PEG.…”

Section: Resultsmentioning

confidence: 99%

Droplet size control in the filter expansion aerosol generator

Jung

2008

Journal of the European Ceramic Society

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Section: Resultsmentioning

confidence: 99%

Droplet size control in the filter expansion aerosol generator

Jung

2008

Journal of the European Ceramic Society

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“…These sizes of particle are consistent with the XRD results. In addition, the spherical morphology of phosphors synthesized by the method in this paper has several advantages, including the high packing densities, good slurry properties, and smoother light intensity distributions [13].…”

Section: Resultsmentioning

confidence: 99%

The Influence of Codopant Aluminum Ions (Al³⁺) on the Optical Characteristics of YBO₃:Sm³⁺ Phosphors

Chen

2015

Journal of Nanomaterials

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The yttrium borate (YBO3) phosphors with codopants Al3+and Sm3+ions were prepared via the chemical coprecipitation method with one-hour thermal treatment at 1200°C. From the XRD patterns, the codopant Al3+does not change the crystal structures of YBO3:Sm3+and these patterns indicate that the phosphors crystallize as the hexagonal structure. Besides, the codopant Al3+does not affect the wavelengths of emission bands but enhances the PL intensities of emission bands. Under the wavelength 406 nm excitation source, the emission peaks locating at wavelengths 571 nm, 611 nm, and 657 nm are assigned to the electronic transitions4G5/2→6H5/2,4G5/2→6H7/2, and4G5/2→6H9/2, respectively. The PL intensities of phosphors Sm0.01AlxY0.99−xBO3increase with the Al3+ion concentration. As the concentration of Al3+ions increases to 3%, the PL intensity of Sm0.01AlxY0.99−xBO3phosphor reaches its maximum intensity. When the concentration of Al3+ions is above 3%, the PL intensity of phosphor Sm0.01AlxY0.99−xBO3decreases. Comparing with the Sm0.01Y0.99BO3phosphor, the PL intensity locating at wavelength 571 nm of Sm0.01Al0.03Y0.96BO3phosphor is about 1.8 times stronger than the Sm0.01Y0.99BO3phosphor. It is believed that the codopant Al3+can improve the luminescent characteristics of YBO3:Sm3+phosphors.

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“…PEG was also selected as an additive to improve the densification of product particles via the SP process, in which PEG serves as a stabilizer of a liquid-phase reaction. [15][16][17][18] In a previous study, our group prepared ZnO/PEG nanocomposites using an in situ method. 19 Gold nanoparticles have recently been synthesized using a polymer method similar to that reported by Bhattacharjee et al 20 In the present study, we report on an alternative route for separating nanocrystallites of as-prepared sprayed particles into dispersed nanoparticles using a CSP method in conjunction with a polymer-assisted heat treatment (annealing).…”

Section: Introductionmentioning

confidence: 99%

Polymer‐Assisted Annealing of Spray‐Pyrolyzed Powders for Formation of Luminescent Particles with Submicrometer and Nanometer Sizes

Wang

Kim

Lenggoro

et al. 2007

Journal of the American Ceramic Society

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Ce) were prepared using a conventional spray pyrolysis method in conjunction with a polymer-assisted heat treatment (annealing). The effects of spray/annealing temperatures, polymer type, polymer concentration, and salt addition on the morphology, crystallinity, particle/crystal size, and the photoluminescence intensity of as-prepared as well as annealed phosphor particles were investigated. The results showed that the nanocrystal growth of as-prepared-sprayed submicrometer particles was improved and that the nanocrystal networks disintegrate into nanoparticles when polymer or salt solutions are added during the heat-treatment process. The additional combustion heat and gas evolution during the thermal reaction of polymer appear to be the main reasons for this. On the contrary, only compacted agglomerated particles rather than dispersed nanoparticles were found in the case of annealing without polymer/salt addition.

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Y 2 O 3 :Eu phosphor particles prepared by spray pyrolysis from a solution containing citric acid and polyethylene glycol

Cited by 20 publications

References 0 publications

Droplet size control in the filter expansion aerosol generator

Droplet size control in the filter expansion aerosol generator

The Influence of Codopant Aluminum Ions (Al³⁺) on the Optical Characteristics of YBO₃:Sm³⁺ Phosphors

Polymer‐Assisted Annealing of Spray‐Pyrolyzed Powders for Formation of Luminescent Particles with Submicrometer and Nanometer Sizes

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Y 2 O 3 :Eu phosphor particles prepared by spray pyrolysis from a solution containing citric acid and polyethylene glycol

Cited by 20 publications

References 0 publications

Droplet size control in the filter expansion aerosol generator

Droplet size control in the filter expansion aerosol generator

The Influence of Codopant Aluminum Ions (Al3+) on the Optical Characteristics of YBO3:Sm3+ Phosphors

Polymer‐Assisted Annealing of Spray‐Pyrolyzed Powders for Formation of Luminescent Particles with Submicrometer and Nanometer Sizes

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The Influence of Codopant Aluminum Ions (Al³⁺) on the Optical Characteristics of YBO₃:Sm³⁺ Phosphors