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P‐93: Thermal Stability of (Sr 1−x ,Ba x ) 3 MgSi 2 O 8 : Eu 2+ Phosphor for Plasma Display Panel Applications
Author(s) -
Im Won Bin,
Kim YongIl,
Jeon Duk Young
Publication year - 2006
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2433561
Subject(s) - phosphor , thermal stability , rietveld refinement , photoluminescence , analytical chemistry (journal) , powder diffraction , materials science , crystallography , chemistry , crystal structure , optoelectronics , organic chemistry , chromatography
We have synthesized a blue‐emitting (Sr 1−x ,Ba x ) 3 MgSi 2 O 8 : Eu 2+ (SB x MS: Eu 2+ ) phosphors with various Ba contents and evaluated their thermal stability. When SB x MS: Eu 2+ samples having various Ba contents were baked at 500 °C in air, the large difference in photoluminescence decrease ratio with various Ba contents was observed. From analyses of electron spin resonance on Eu 2+ and Rietveld refinement against neutron powder diffraction, the difference in thermal stability of SB x MS: Eu 2+ could be ascribed to different Eu 2+ sites occupied depending upon amount of Ba substitution. From calculation of the average inter‐atomic distance between Eu 2+ −O (d Eu−O ) of SB x MS: Eu 2+ , we confirmed that the d Eu‐O of different Sr sites may play an important role in thermal stability of phosphors.