LUMINESCENCE AND HIGH-RESOLUTION TRANSMISSION ELECTRON-MICROSCOPY STUDY OF CR3-DOPED LAPO4 AND LAMGB5O10()

Authors
VANSCHAIK W POORT SHM BLASSE G OMIL JAP MARQUEZ SB
Citation
W. Vanschaik et al., LUMINESCENCE AND HIGH-RESOLUTION TRANSMISSION ELECTRON-MICROSCOPY STUDY OF CR3-DOPED LAPO4 AND LAMGB5O10(), Chemistry of materials, 6(6), 1994, pp. 755-760
Citations number
24
Categorie Soggetti
Chemistry Physical","Material Science
Journal title
Chemistry of materials → ACNP
ISSN journal
08974756
Volume
6
Issue
6
Year of publication
1994
Pages
755 - 760
Database
ISI
SICI code
0897-4756(1994)6:6<755:LAHTES>2.0.ZU;2-C
Abstract
The luminescence properties of the compounds LaPO4:Cr and LaMgB5O10:Cr at 4.2 K are reported. Furthermore, the morphology of these compounds has been studied with a high-resolution transmission electron microsc ope (HRTEM). The Cr3+ ion shows a Stokes-shifted broad-band emission i n the near-infrared region which is attributed to the 4T2 --> 4A2 tran sition. In the excited state of Cr3+ a large relaxation takes place. T he luminescence characteristics are typical for Cr3+ in a glass. It is concluded that the Cr3+ ion is not built-in into either LaPO4 or LaMg B5O10 but is present in an amorphous surface layer. The amorphous seco nd phase is observed in HRTEM images.