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The Photoluminescence Characteristic of Ba2-xSrxSiO4:Eu2+ Phosphor Particles Prepared by Spray Pyrolysis  

Kang, Hee Sang (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology)
Park, Seung Bin (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology)
Koo, Hye Young (Department of Chemical Engineering, Konkuk University)
Kang, Yun Chan (Department of Chemical Engineering, Konkuk University)
Publication Information
Korean Chemical Engineering Research / v.44, no.6, 2006 , pp. 609-613 More about this Journal
Abstract
Ba2-xSrxSiO4:Eu2+ phosphor particles with the high photoluminescence (PL) intensity under long wavelength ultraviolet (UV) were prepared by spray pyrolysis. The photoluminescence, morphological and crystalline characteristics of $Ba_{2-x.}Sr_{x.}SiO_4:Eu^{2+}$ phosphor particles prepared by spray pyrolysis were investigated. $Ba_{2-x.}Sr_{x.}SiO_4:Eu^{2+}$ phosphor particles prepared by spray pyrolysis had various colors from bluish green to yellow by changing the ratio of barium and strontium of the host material. In case of x=0, the main emission peak of $Ba_2SiO_4:Eu^{2+}$ phosphor was 500 nm. In case of x=2, the main emission peak of $Sr_2SiO_4:Eu^{2+}$ phosphor was 554nm. $Ba_{2-x.}Sr_{x.}SiO_4:Eu^{2+}$ phosphor particles obtained by spray pyrolysis had spherical shape and hollow structure. On the other hand, the post-treated $Ba_{2-x.}Sr_{x.}SiO_4:Eu^{2+}$ phosphor particles had large size and irregular shape. The $Ba_{1.488}Sr_{0.5}SiO_4:Eu_{0.012}{^{2+}}$ phosphor particles had the maximum PL intensity after post-treatment at temperature of $1300^{\circ}C$ for 3h under reduction atmosphere.
Keywords
Phosphor; Silicate; Spray Pyrolysis; LED;
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