Jagannathan, R and Rao, RP and Kutty, TRN (1992) Eu2+ luminescence in MAl3BO7 aluminoborates (M=Ca, Sr, Ba). In: Materials Research Bulletin, 27 (4). pp. 459-466.
PDF
Eu_LUMINESCENCE_IN.pdf - Published Version Restricted to Registered users only Download (457kB) | Request a copy |
Abstract
Three new aluminoborates having the composition MAl3BO7, where M = Ca,Sr or Ba, have been prepared. X-ray diffraction data indicate that all the phases are monoclinic, with close structural similarity to the meta stable aluminate, SrAl4O7. These aluminoborates are good host lattices for Eu2+ luminescence. The emission spectra show multiple bands in the blue region, corresponding to two inequivalent sites in each case, with one of them having quantum efficiency greater-than or equivalent to 75%. In the case of SrAl3BO7:Eu2+, the d–f band emission dominates at 300 K whereas at 77 K both d–f band and f–f line emissions are observed. Efficient Eu2+→Mn2+ energy transfer is observed in MAl3BO7 leading to strong green emission of Mn2+in the tetrahedral sites.aluminoborates; europium
Item Type: | Journal Article |
---|---|
Publication: | Materials Research Bulletin |
Publisher: | Elsevier science |
Additional Information: | Copyright of this article belongs to Elsevier science. |
Department/Centre: | Division of Chemical Sciences > Materials Research Centre |
Date Deposited: | 24 Jan 2011 08:57 |
Last Modified: | 24 Jan 2011 08:57 |
URI: | http://eprints.iisc.ac.in/id/eprint/35222 |
Actions (login required)
View Item |