Effect of Aluminum Polycation Solution on the Morphology and VUV Characteristics of BaMgAl10O17 Blue Phosphor Prepared by Spray Pyrolysis

Dong Youl Lee, Yun Chan Kang, Kyeong Youl Jung

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Spherical BaMgAl10O17:Eu (BAM) phosphor particles with good photoluminescence characteristics under the excitation of vacuum ultraviolet light were synthesized by spray pyrolysis. Two different spray solutions were prepared to see the changes in the morphology and luminance properties of BAM particles. One was an aqueous solution; the other was a polycation solution which was obtained by chemically modifying the aqueous solution with NH4OH. The BAM particles prepared with the aqueous solution had a porous structure and utterly lost their spherical morphology after post heat-treatment. On the contrary, completely dense and spherical particles were obtained from the polycation solution and their spherical morphology was maintained even after heat-treatment. The dense and spherical BAM particles showed remarkable improvement in photoluminescence intensity compared to that of the hollow particles as well as the commercial one. According to X-ray diffraction analysis, there was no difference in the crystal structures of the two samples. So, the improved photoluminescence comes not from the difference of chemical composition or crystal structure, but from the morphological difference.

Original languageEnglish
JournalElectrochemical and Solid-State Letters
Volume6
Issue number11
DOIs
Publication statusPublished - 2003 Nov 1
Externally publishedYes

Fingerprint

Spray pyrolysis
Aluminum
Phosphors
phosphors
pyrolysis
sprayers
aluminum
Photoluminescence
aqueous solutions
photoluminescence
heat treatment
Crystal structure
Heat treatment
crystal structure
luminance
ultraviolet radiation
X ray diffraction analysis
polycations
Luminance
hollow

ASJC Scopus subject areas

  • Electrochemistry
  • Materials Science(all)

Cite this

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abstract = "Spherical BaMgAl10O17:Eu (BAM) phosphor particles with good photoluminescence characteristics under the excitation of vacuum ultraviolet light were synthesized by spray pyrolysis. Two different spray solutions were prepared to see the changes in the morphology and luminance properties of BAM particles. One was an aqueous solution; the other was a polycation solution which was obtained by chemically modifying the aqueous solution with NH4OH. The BAM particles prepared with the aqueous solution had a porous structure and utterly lost their spherical morphology after post heat-treatment. On the contrary, completely dense and spherical particles were obtained from the polycation solution and their spherical morphology was maintained even after heat-treatment. The dense and spherical BAM particles showed remarkable improvement in photoluminescence intensity compared to that of the hollow particles as well as the commercial one. According to X-ray diffraction analysis, there was no difference in the crystal structures of the two samples. So, the improved photoluminescence comes not from the difference of chemical composition or crystal structure, but from the morphological difference.",
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T1 - Effect of Aluminum Polycation Solution on the Morphology and VUV Characteristics of BaMgAl10O17 Blue Phosphor Prepared by Spray Pyrolysis

AU - Lee, Dong Youl

AU - Kang, Yun Chan

AU - Jung, Kyeong Youl

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N2 - Spherical BaMgAl10O17:Eu (BAM) phosphor particles with good photoluminescence characteristics under the excitation of vacuum ultraviolet light were synthesized by spray pyrolysis. Two different spray solutions were prepared to see the changes in the morphology and luminance properties of BAM particles. One was an aqueous solution; the other was a polycation solution which was obtained by chemically modifying the aqueous solution with NH4OH. The BAM particles prepared with the aqueous solution had a porous structure and utterly lost their spherical morphology after post heat-treatment. On the contrary, completely dense and spherical particles were obtained from the polycation solution and their spherical morphology was maintained even after heat-treatment. The dense and spherical BAM particles showed remarkable improvement in photoluminescence intensity compared to that of the hollow particles as well as the commercial one. According to X-ray diffraction analysis, there was no difference in the crystal structures of the two samples. So, the improved photoluminescence comes not from the difference of chemical composition or crystal structure, but from the morphological difference.

AB - Spherical BaMgAl10O17:Eu (BAM) phosphor particles with good photoluminescence characteristics under the excitation of vacuum ultraviolet light were synthesized by spray pyrolysis. Two different spray solutions were prepared to see the changes in the morphology and luminance properties of BAM particles. One was an aqueous solution; the other was a polycation solution which was obtained by chemically modifying the aqueous solution with NH4OH. The BAM particles prepared with the aqueous solution had a porous structure and utterly lost their spherical morphology after post heat-treatment. On the contrary, completely dense and spherical particles were obtained from the polycation solution and their spherical morphology was maintained even after heat-treatment. The dense and spherical BAM particles showed remarkable improvement in photoluminescence intensity compared to that of the hollow particles as well as the commercial one. According to X-ray diffraction analysis, there was no difference in the crystal structures of the two samples. So, the improved photoluminescence comes not from the difference of chemical composition or crystal structure, but from the morphological difference.

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