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Вид документа : Статья из журнала
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Автор(ы) : Ji, Haipeng, Cho, Yujin, Wang, L.e., Hirosaki, Naoto, Molokeev M. S., Huang, Zhaohui, Xie, Rong-Jun
Заглавие : Phase formation of (Y,Ce)2BaAl4SiO12 yellow microcrystal-glass phosphor for blue LED pumped white lighting
Место публикации : Ceram. Int.: Elsevier Science, 2017. - Vol. 43, Is. 8. - P.6425-6429. - ISSN 0272-8842, DOI 10.1016/j.ceramint.2017.02.055. - ISSN 1873-3956(eISSN)
Примечания : Cited References:12. - This study was partially supported by the National Natural Science Foundations of China (Grants No. 51272259, 51572232 and 51561135015). R.X. was partially supported by the JSPS KAKENHI (No. 15K06448). M.M. was partially supported by the Russian Foundation for Basic Research (Grant No. 15-52-53080) H.J. thanks the China Scholarship Council (CSC) for scholarship support.
Предметные рубрики: LUMINESCENCE
EVOLUTION
Ключевые слова (''Своб.индексиров.''): phosphor--wled--photoluminescence--cathodoluminescence
Аннотация: The (Y,Ce)2BaAl4SiO12 phosphor, a garnet-structured blue-to-yellow color convertor for WLED, exhibits an interesting “microcrystal-glass powder” feature, which can be regarded as the 4th form for phosphor, in addition to the “ceramic powder phosphor”, the “single crystal phosphor” and the “glass-ceramic phosphor”. The structure exhibits luminescent microcrystals embedding in non-luminescent glass matrix: the spherical crystals are mainly arranged around the glass phase forming a “necklace” pattern, while the individual crystals show a “core-shell” architecture regarding the luminescence intensity variation. Further combining the phase evolution evidence evaluated by Rietveld refinement, we propose the formation mechanism for such unique morphology/structure as a two-stage process, including an initial nucleation by solid state reaction and following liquid-assisted crystal growth, instead of a precipitation-crystallization process.
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