Luminescence Matching with the Sensitivity Curve of the Human Eye: Optical Ceramics Mg 8– x M x (BN 2 ) 2 N 4 with M = Al ( x = 2) and M = Si ( x = 1)

Autor:	David Enseling, Boriana Mihailova, Konstantin Dolabdjian, Thomas Jüstel, Danuta Dutczak, H.-Jürgen Meyer, Markus Ströbele
Rok vydání:	2015
Předmět:	Inorganic Chemistry Diffraction Chemistry Doping Analytical chemistry chemistry.chemical_element Mineralogy Crystal structure Nitride Luminescence Europium Excitation Ion
Zdroj:	European Journal of Inorganic Chemistry. 2015:1716-1725
ISSN:	1099-0682 1434-1948
DOI:	10.1002/ejic.201403116
Popis:	Compounds Mg8–xMx(BN2)2N4 were prepared by solid-state reaction of MgCl2, Li3(BN2), and AlN for M = Al, and of Mg3N2, BN, and Si3N4 for M = Si. Their crystal structures were refined from powder X-ray diffraction data with the space group Rm for M = Al, Si, and P21/c for M = Si. The structures of Mg8–xMx(BN2)2N4 are characterized by layered arrangements of wurtzite-related block layers alternating with a layer of di-nitridoborate ions along the c-axis direction. Cations in each structure are surrounded tetrahedrally by nitride and di-nitridoborate ions. Europium(II)-doped powders of Mg8–xMx(BN2)2N4 show exceptional broad band emissions in the visible region of the spectrum, on excitation with UV radiation at λex = 320 nm.
Databáze:	OpenAIRE
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