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

Y.Q. Li, G. With, de, H.T.J.M. Hintzen

Research output: Contribution to journalArticleAcademicpeer-review

159 Citations (Scopus)

Abstract

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 (x0.1) 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˜0.05) for both Ca2Si5N8 and Sr2Si5N8, and at 1.0 mol% (x0.02) 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 (
Original languageEnglish
Pages (from-to)107-116
JournalJournal of Luminescence
Volume116
Issue number1-2
DOIs
Publication statusPublished - 2006

Fingerprint

Dive into the research topics of 'Luminescence properties of Ce3+-activated alkaline earth silicon nitride M2Si5N8 (M = Ca, Sr, Ba) materials'. Together they form a unique fingerprint.

Cite this