Size-dependent luminescent properties of hollow and dense BaMgAl10O17 : Eu blue phosphor particles prepared by spray pyrolysis

Hollow and dense BaMgAl10O17 : Eu2+ (BAM) phosphor particles were synthesized by a spray pyrolysis process and their luminescent properties were investigated under vacuum ultraviolet (VUV) excitation as varying the average particle size. The dependence of the luminescent intensity on the particle size was greatly influenced by the morphology of BAM particles. For the BAM particles with a hollow structure, the luminescent intensity linearly increased with increasing the particle size. However, no significant change in the luminescent intensity was observed for dense particles as the particle size changed. Also, all dense BAM particles had higher photoluminescence intensity than that of the hollow ones regardless of the particle size. The luminescent intensity of BAM phosphor particles prepared by spray pyrolysis was found to have a linear relationship with the crystallite size. Therefore, it was concluded that suppressing the formation of a hollow structure and increasing the crystallite size are needed to obtain high luminous BAM phosphor particles with a spherical shape and fine size of less than 1 . On the basis of penetration depth of VUV, a simple relation equation between the particle size and the luminescent intensity was derived and correlated with experimental results in order to interpret the luminescent behavior of BAM phosphor as the particle size changes.
Publisher
KOREAN INST CHEM ENGINEERS
Issue Date
2004-09
Language
ENG
Keywords

ULTRASONIC SPRAY; VUV CHARACTERISTICS; MORPHOLOGY CONTROL; OPTICAL-PROPERTIES; PHOTOLUMINESCENCE; PRECURSOR

Citation

KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.21, no.5, pp.1072 - 1080

ISSN
0256-1115
DOI
10.1007/BF02705595
URI
http://hdl.handle.net/10203/9560
Appears in Collection
CBE-Journal Papers(저널논문)
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