Luminescence distribution of Yb-doped Ca-α-SiAlON phosphors

被引：21

作者：

Dierre, B. ^{[1
,2
]}

Yuan, X. L. ^{[1
]}

Hirosaki, N. ^{[1
]}

Kimura, T. ^{[1
]}

Xie, R-J. ^{[1
]}

Sekiguchi, T. ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[2] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3050044, Japan

来源：

JOURNAL OF MATERIALS RESEARCH | 2008年 / 23卷 / 06期

关键词：

D O I：

10.1557/JMR.2008.0208

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Luminescence properties of Yb-doped Ca-alpha-SiAlON phosphors with composition of Ca1-xYbxSi12-(m+n)Alm+nOnN16-n were investigated by using cathodoluminescence (CL). The ratio of Yb to Ca was kept constant while the host lattice was changed by replacing m+n(Si-N) bonds with m(Al-N) and n(Al-O) bonds. The luminescence of these phosphors consists of three peaks in the ultraviolet (UV), green (VIS), and infrared (IR) regions, which are attributed to the emissions from secondary phases, Yb2+ and Yb3+, respectively. The UV emission depends on the Si/Al ratio: the UV peak is centered at 310 nm for the Si-rich mix and at 360 nm for the Al-rich mix. We have found that Yb exists in the divalent state in alpha-SiAlON and in the trivalent state in the secondary phases.

引用

页码：1701 / 1705

页数：5

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