Jump to main content
Jump to site search

Issue 37, 2019
Previous Article Next Article

Synthesis, structure and properties of a calcium oxonitridosilicate phosphor showing green or red luminescence upon doping with Eu2+ or Ce3+

Author affiliations

Abstract

The phase LixCa16−xSi17N32−xO2+x was synthesized by solid-state metathesis at 1050 °C in weld-sealed niobium ampoules. The crystal structure was solved from powder X-ray diffraction data in the space group F[4 with combining macron]3m (a = 14.7391(1) Å, Z = 4); it is closely related to the previously reported structure of Ca16Si17N34. The structure of LixCa16−xSi17N32−xO2+x is based on a complex network of [SiN4] tetrahedra with interstitial voids filled by Ca ions, partially substituted by Li. This Li substitution is charge-compensated by replacement of N by O in the structure. Theoretical calculations confirm that the unit cell volume decreases with increasing stoichiometric factor x. Europium doped samples of this compound show intense Eu2+ emission at 536 nm on excitation with near-UV or blue radiation at 350–480 nm. Ce3+ doping yields orange to red emission with two broad emission bands at 600 and 665 nm.

Graphical abstract: Synthesis, structure and properties of a calcium oxonitridosilicate phosphor showing green or red luminescence upon doping with Eu2+ or Ce3+

Back to tab navigation

Supplementary files

Article information


Submitted
18 Jun 2019
Accepted
29 Aug 2019
First published
06 Sep 2019

Dalton Trans., 2019,48, 14069-14076
Article type
Paper

Synthesis, structure and properties of a calcium oxonitridosilicate phosphor showing green or red luminescence upon doping with Eu2+ or Ce3+

R. Schmidt, M. Ströbele, C. P. Romao, D. Enseling, T. Jüstel and H. Meyer, Dalton Trans., 2019, 48, 14069
DOI: 10.1039/C9DT02564B

Social activity

Search articles by author

Spotlight

Advertisements