Blue-yellow multicolor phosphor, Eu2+-activated Li3NaSiO4: Excellent thermal stability and quenching mechanism

被引：40

作者：

Iwaki, Masato ^{[1
]}

Kumagai, Shota ^{[1
]}

Konishi, Shoma ^{[1
]}

Koizumi, Atsuya ^{[1
]}

Hasegawa, Takuya ^{[1
,2
]}

Uematsu, Kazuyoshi ^{[1
]}

Itadani, Atsushi ^{[3
]}

Toda, Kenji ^{[1
]}

Sato, Mineo ^{[4
]}

机构：

[1] Niigata Univ, Grad Sch Sci & Technol, 8050 Ikarashi 2 Nocho, Niigata 9502181, Japan

[2] Kochi Univ, Fac Agr & Marine Sci, Dept Marine Resource Sci, 200 Otsu, Nankoku, Kochi 7838502, Japan

[3] Obihiro Univ Agr & Vet Med, Dept Human Sci, Obihiroshi Inadacho Nishi 2 Sen 11, Obihiro, Hokkaido 0808555, Japan

[4] Niigata Univ, Dept Chem & Chem Engn, 8050 Ikarashi 2 Nocho, Niigata 9502181, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 776卷

关键词：

Multicolor emission phosphor; Good thermal stability; Eu2+-activated phosphor; Alkaline sites; EU3+ ENERGY-TRANSFER; LUMINESCENCE PROPERTIES; EMITTING PHOSPHOR; PHOTOLUMINESCENCE PROPERTIES; OPTICAL-PROPERTIES; RECENT PROGRESS; RED EMISSION; WHITE; GENERATION; TB3+;

D O I：

10.1016/j.jallcom.2018.10.299

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：1016 / 1024

页数：9

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