Lanthanide-activated Na5Gd9F32 nanocrystals precipitated from a borosilicate glass: Phase-separation-controlled crystallization and optical property

被引：35
作者：
Chen, Daqin [1 ,2 ]
Wan, Zhongyi [1 ]
Zhou, Yang [1 ]
Chen, Yan [1 ]
Yu, Hua [1 ]
Lu, Hongwei [1 ]
Ji, Zhenguo [1 ]
Huang, Ping [2 ]
机构：
[1] Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Hangzhou 310018, Zhejiang, Peoples R China
[2] Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 625卷
基金：
中国国家自然科学基金;
关键词：
Optical materials; Glass ceramics; Upconversion; Nanocrystals; Optical properties; UP-CONVERSION LUMINESCENCE; CERAMICS; EMISSION; ER3+;
D O I：
10.1016/j.jallcom.2014.11.128
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：
Lanthanide-activated cubic Na5Gd9F32 nanocrystals were precipitated from a borosilicate glass with a specifically designed composition. The precursor glass is already phase-separated after melt-quenching, which is beneficial to the realization of the controllable glass crystallization for affording desirable size, morphology and activator partition. Elemental mapping in the scanning transmission electron microscopy evidenced that the segregation of lanthanide ions into the Na5Gd9F32 lattice was in situ formed without the requirement of long-range ionic diffusion. Impressively, such fabricated glass ceramic co-doped with Yb3+/Er3+ ions exhibited intense upconversion luminescence, which was about 500 times higher than that of the precursor glass, and its luminescent color could be easily tuned from red to green by controlling glass crystallization temperature. It is anticipated that such phase-separation synthesis strategy with precise control over nanostructure of glass ceramics offer a great opportunity to design other highly transparent nanocomposites with a wide range of tunable optical properties. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：149 / 157
页数：9
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