Luminescence centers and valence change of Eu2+ in KCaF3

Authors
Liu, YL Shi, CS
Citation
Yl. Liu et Cs. Shi, Luminescence centers and valence change of Eu2+ in KCaF3, MATER RES B, 35(5), 2000, pp. 689-694
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS RESEARCH BULLETIN
ISSN journal
00255408 → ACNP
Volume
35
Issue
5
Year of publication
2000
Pages
689 - 694
Database
ISI
SICI code
0025-5408(20000315)35:5<689:LCAVCO>2.0.ZU;2-P
Abstract
The nature of the emission centers and the valence change of Eu2+ in KCaF3: Eu2+ depends strongly on preparation conditions. Experimental results show that there are two different d-->f emission bands, located at 425 and 510 n m, respectively. Their origin, relationship, and the effect of doping conce ntration on them are discussed. A Eu2+-Eu3+ valence change process is propo sed. (C) 2000 Elsevier Science Ltd. All rights reserved.