Luminescence and high-resolution transmission electron microscopy study of Cr3+-doped LaPO4 and LaMgB5O10

Autor:	W. van Schaik, S. H. M. Poort, G. Blasse, S. Bernal Marquez, J. A. Perez Omil
Předmět:	Materials science General Chemical Engineering Doping General Chemistry Amorphous solid Ion chemistry.chemical_compound Crystallography chemistry Ternary compound Transmission electron microscopy Materials Chemistry Diffuse reflection Luminescence High-resolution transmission electron microscopy
Zdroj:	Scopus-Elsevier
Popis:	The luminescence properties of the compounds LaPO{sub 4}:Cr and LaMgB{sub 5}O{sub 10}:Cr at 4.2 K are reported. Furthermore, the morphology of these compounds has been studied with a high-resolution transmission electron microscope (HRTEM). The Cr{sup 3+} ion shows a Stokes-shifted broad-band emission in the near-infrared region which is attributed to the {sup 4}T{sub 2}{r_arrow}{sup 4}A{sub 2} transition. It is concluded that the Cr{sup 3+} ion is not built-in into either LaPO{sub 4} or LaMgB{sub 5}O{sub 10} but is present in an amorphous surface layer. The amorphous second phase is observed in HRTEM images. 22 refs., 6 figs.
Databáze:	OpenAIRE
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