Blue-yellow multicolor phosphor, Eu2+-activated Li3NaSiO4: Excellent thermal stability and quenching mechanism
Blue-yellow multicolor phosphor, Eu2+-activated Li3NaSiO4: Excellent thermal stability and quenching mechanism
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DOI：
10.1016/j.jallcom.2018.10.299
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发表时间：
2019-03-05
影响因子：
6.2
通讯作者：
Sato, Mineo
中科院分区：
文献类型：
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作者：
Iwaki, Masato;Kumagai, Shota;Sato, Mineo
荧光发射磷光体可以成为用于诸如LED的发射器件的新的发光材料。然而，大多数磷光体需要两种或更多种发光离子，例如Eu 2 +/Mn 2+和Eu 2 +/Tb 3 +/Mn 2+。采用传统的固相反应法成功地合成了新型的Li 3 NaSiO 4：Eu 2+荧光粉。在360 nm的近紫外光下，荧光粉呈现出独特的白色，并发射出多色的蓝色和黄色。基于这一结果，似乎有强有力的证据表明Eu 2+离子取代了两个阳离子位点NaO（6）和LiO 5。此外，Eu 2+掺杂的Li 3 NaSiO 4磷光体与Eu 2+激活的硅酸盐磷光体相比由于电子陷阱的存在而表现出优异的热稳定性，所述电子陷阱可以在高温下被激活。(C)2018由Elsevier B. V.出版
A multicolor emission phosphor can become a new luminescent material for emitting devices such as LEDs. However, most multicolor emission phosphors require two or more luminescent ions, such as Eu2+/Mn2+ and Eu2+/Tb3+/Mn2+. In this study, novel multicolor phosphor materials Li3NaSiO4:Eu2+ were successfully synthesized using a conventional solid-state reaction. The phosphors showed a unique white color with multicolored blue and yellow emissions under a near-ultraviolet light at 360 nm. Based on this result, there seems to be strong evidence that Eu2+ ions are substituted for two cation sites, NaO(6 )and LiO5. Moreover, Eu2+-doped Li3NaSiO4 phosphors exhibit excellent thermal stability in comparison with Eu2+-activated silicate phosphors owing to the presence of electron traps, which can be activated at high temperatures. (C) 2018 Published by Elsevier B.V.