Rare earth doped silicate-oxyfluoride glass ceramics incorporating LaF3 nano-crystals for UV-LED color conversion

被引：28

作者：

Bae, Suk-Rok ^{[1
,2
]}

Choi, Yong Gyu ^{[3
]}

Bin Im, Won ^{[4
]}

Lee, Ki Seok ^{[5
]}

Chung, Woon Jin ^{[1
,2
]}

机构：

[1] Kongju Natl Univ, Inst Rare Met, Cheonan 330717, Chungnam, South Korea

[2] Kongju Natl Univ, Div Adv Mat Engn, Cheonan 330717, Chungnam, South Korea

[3] Korea Aerosp Univ, Dept Mat Sci & Engn, Goyang 412791, Gyeonggi, South Korea

[4] Chonnam Natl Univ, Sch Mat Sci & Engn, Kwangju 500757, South Korea

[5] Kongju Natl Univ, Dept Mech Engn & Automot Engn, Cheonan 330717, Chungnam, South Korea

来源：

OPTICAL MATERIALS | 2013年 / 35卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

LaF3; Glass-ceramics; Nano-crystals; Dy3+; Luminescence; LUMINESCENCE BEHAVIOR; BAF2; NANOCRYSTALS; CAF2; EMISSION; IONS;

D O I：

10.1016/j.optmat.2012.09.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Rare earth doped oxyfluoride glass ceramics with LaF3 nano-crystals formed inside were fabricated for color converter of UV-LED. Among various rare earth ions, Dy3+ and Eu3+ showed practically utilizable visible emissions under UV-LED excitation of 365 nm. The visible emission has been improved by the formation of LaF3 brought by heat treatment. X-ray diffraction and transmission electron microscopy along with its energy dispersive spectra confirmed the formation of LaF3 nano-crystals. Compositional dependence and the effects of heat treatment conditions on the visible emissions have been investigated. The CIE chromaticity coordinates of the glasses were also examined for Dy3+ singly doped and co-doped samples. The effect of LaF3 nano-crystals and co-dopants on the visible emission properties of Dy3+ was discussed. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：2034 / 2038

页数：5

共 18 条

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