In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 31, No. 15 ( 2016-08-15), p. 2268-2276
Abstract:
Red-emitting (La,Eu) 2 O 2 SO 4 phosphors have been successfully prepared using the layered hydroxide of (La,Eu) 2 (OH) 4 SO 4 ·2H 2 O as the precursor. The precursor compound was firstly crystallized via hydrothermal reaction (100 °C and pH = 9.0) as well-dispersed nanoplates, followed by dehydration and dehydroxylation in the 400–1200 °C temperature range in ambient air to yield (La,Eu) 2 O 2 SO 4 . The phosphors show intense red emissions originated from the f – f transitions of Eu 3+ , dominantly peaking at 617 nm, under O–Eu charge transfer excitation at 284 nm. The optimal Eu 3+ content was experimentally determined to be 5 at.%, agreeing well with theoretical analysis, and the concentration quenching of luminescence was suggested to be due to exchange interactions. Fluorescence decay analysis indicates that a higher calcination temperature or Eu 3+ content would decrease the lifetime of the 617 nm emission.
Type of Medium:
Online Resource
ISSN:
0884-2914
,
2044-5326
DOI:
10.1557/jmr.2016.185
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2016
detail.hit.zdb_id:
54876-5
detail.hit.zdb_id:
2015297-8
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