Luminescence properties of Ce3+-activated alkaline earth silicon nitride M2Si5N8 (M = Ca, Sr, Ba) materials

被引：154

作者：

Li, YQ ^{[1
]}

de With, G ^{[1
]}

Hintzen, HT ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Lab Mat & Interface Chem, NL-5600 MB Eindhoven, Netherlands

来源：

JOURNAL OF LUMINESCENCE | 2006年 / 116卷 / 1-2期

关键词：

alkaline-earth silicon nitride; luminescence; phosphors; cerium; X-ray powder diffraction; white-light LEDs;

D O I：

10.1016/j.jlumin.2005.03.014

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The luminescence properties of Ce3+, Li+ or Na+ co-doped alkaline-earth silicon nitride M2Si5N8 (M = Ca, Sr, Ba) are reported. The solubility of Ce3+ and optical properties Of M2-2xCexLixSi5N8 (x <= 0.1) materials have been investigated as function of the cerium concentration by X-ray powder diffraction analysis and fluorescence spectroscopy. X-ray diffraction results show that the maximum solubility of Ce3+ in M2Si5N8 is about 2.5 mol% (x approximate to 0.05) for both Ca2Si5N8 and Sr2Si5N8, and at 1.0 mol% (x <= 0.02) for Ba2Si5N8. The Ce3+-activated M2Si5N8 phosphors exhibit broad emission bands with maxima at 470, 553 and 451 nm for M = Ca, Sr, Ba, respectively, due to the 5d -> 4f transition of Ce3+. In addition, M2Si5N8:Ce3+, Li+ (M = Sr, Ba) obviously shows two Ce3+ emission centers due to the fact that the Ce3+ ions occupy two M sites. With increasing Ce3+ concentration, both absorption and emission intensity increase and the position of the emission bands show a slight red-shift (< 10 nm). The influence of using Na+ instead of Li+ ion as charge compensator on emission and excitation properties is small but Na+ enhances the emission intensity because of larger solubility of Ce3+ in M2Si5N8 (M = Ca, Sr). With increasing the ionic radius going from Ca to Sr and Ba, the ratio of the emission intensity to the absorption intensity of Ce3+ decreases related to a decreasing Ce3+ solubility. An intense absorption and excitation band in the blue range (370-450 nm) in M2Si5N8:Ce, Li(Na) (M = Ca, Sr) points out that these materials are promising conversion phosphors for white-light LEDs. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：107 / 116

页数：10

共 20 条

[1]

Blasse G., 1994, LUMINESCENT MAT, DOI [10.1007/978-3-642-79017-1_1, DOI 10.1007/978-3-642-79017-1_1]

[2] The influence of the composition on the luminescence of Ce(III)-Ln-Si-Al-O-N glasses (Ln = Sc, Y, La, Gd) [J].

de Graaf, D ;

Hintzen, HT ;

de With, G .

JOURNAL OF LUMINESCENCE, 2003, 104 (1-2) :131-136

[3] 5d-level energies of Ce3+ and the crystalline environment.: III.: Oxides containing ionic complexes -: art. no. 125117 [J].

Dorenbos, P .

PHYSICAL REVIEW B, 2001, 64 (12)

[4] Inorganic luminescent materials:: 100 years of research and application [J].

Feldmann, C ;

Jüstel, T ;

Ronda, CR ;

Schmidt, PJ .

ADVANCED FUNCTIONAL MATERIALS, 2003, 13 (07) :511-516

[5]

HINTZEN HT, 1999, Patent No. 1104799

[6] Luminescence in Eu2+-doped Ba2Si5N8:: fluorescence, thermoluminescence, and upconversion [J].

Höppe, HA ;

Lutz, H ;

Morys, P ;

Schnick, W ;

Seilmeier, A .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2000, 61 (12) :2001-2006

[7] CE-3+-ACTIVATED PHOTOLUMINESCENCE IN BAO-SRO-SIO2 SYSTEM .1. CRYSTALLINE PHASES [J].

KELSEY, PV ;

BROWN, JJ .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1976, 123 (09) :1384-1388

[8] LUMINESCENCE OF CE-3+DOPED ALUMINOBORATES, M3AL6B8O24 (M = MG, CA, SR, BA) [J].

KUTTY, TRN .

MATERIALS RESEARCH BULLETIN, 1990, 25 (03) :343-348

[9] LUMINESCENCE OF CE-3+ AND TB-3+ IN SR3(PO4)2, BA3(PO4)2 [J].

LAMMERS, MJJ ;

VERHAAR, HCG ;

BLASSE, G .

MATERIALS CHEMISTRY AND PHYSICS, 1987, 16 (01) :63-66

[10] Preparation, structure and photoluminescence properties of EU2+ and Ce3+-doped SrYSi4N7 [J].

Li, YQ ;

Fang, CM ;

de With, G ;

Hintzen, HT .

JOURNAL OF SOLID STATE CHEMISTRY, 2004, 177 (12) :4687-4694

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