TY - JOUR
T1 - Blue-yellow multicolor phosphor, Eu2+-activated Li3NaSiO4
T2 - Excellent thermal stability and quenching mechanism
AU - Iwaki, Masato
AU - Kumagai, Shota
AU - Konishi, Shoma
AU - Koizumi, Atsuya
AU - Hasegawa, Takuya
AU - Uematsu, Kazuyoshi
AU - Itadani, Atsushi
AU - Toda, Kenji
AU - Sato, Mineo
N1 - Funding Information:
This work was partly supported by JSPS KAKENHI Grant Number 17H03124 and Number 17H03386 .
Publisher Copyright:
© 2018
PY - 2019/3/5
Y1 - 2019/3/5
N2 - 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, NaO6 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.
AB - 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, NaO6 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.
KW - Alkaline sites
KW - Eu-activated phosphor
KW - Good thermal stability
KW - Multicolor emission phosphor
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U2 - 10.1016/j.jallcom.2018.10.299
DO - 10.1016/j.jallcom.2018.10.299
M3 - Article
AN - SCOPUS:85055892649
VL - 776
SP - 1016
EP - 1024
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -