Photoluminescence properties of Yb2+ in CaAlSiN3 as a novel red-emitting phosphor for white LEDs

被引：69

作者：

Zhang, Zhijun ^{[1
,2
]}

ten Kate, Otmar M. ^{[1
,3
]}

Delsing, Anneke C. A. ^{[1
]}

Stevens, Marjo J. H. ^{[1
]}

Zhao, Jingtai ^{[2
]}

Notten, Peter H. L. ^{[1
]}

Dorenbos, Pieter ^{[3
]}

Hintzen, Hubertus T. ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Dept Chem Engn & Chem, NL-5600 MB Eindhoven, Netherlands

[2] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Transparent Optofunct Inorgan Mat, Shanghai 200050, Peoples R China

[3] Delft Univ Technol, Luminescent Mat Res Grp, NL-2629 JB Delft, Netherlands

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 45期

关键词：

INORGANIC-COMPOUNDS; ALPHA-SIALON; LUMINESCENCE PROPERTIES; DIODES; EMISSION; EU2+;

D O I：

10.1039/c2jm35170f

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：

This paper reports on the diffuse reflection spectra, photoluminescence spectra and chromaticity of ytterbium in CaAlSiN3 at room temperature. It can be excited efficiently over a broad spectral range between 280 and 580 nm and exhibits a single intense red emission at 629 nm with a full width at half maximum of 75 nm due to the electronic transitions from the excited state of 4f(13)5d to the ground state 4f(14) of Yb2+. The low energy of Yb2+ emission in CaAlSiN3 can be attributed to the large nephelauxetic effect and crystal field splitting due to the coordination of Yb2+ by nitrogen. This novel developed CaAlSiN3:Yb2+, which is the first Yb2+-activated nitride red-emitting phosphor, has potential applications in spectral conversion materials for warm-white LEDs. The width of the emission band, Stokes shift and thermal quenching mechanism of Yb2+ in CaAlSiN3 and (oxy)nitride-based phosphors are discussed and compared with those of Eu2+.

引用

页码：23871 / 23876

页数：6

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